The causative agent of venereal and non-venereal syphilis as well as yaws.
A contagious venereal disease caused by the spirochete TREPONEMA PALLIDUM.
Sensitive tests to measure certain antigens, antibodies, or viruses, using their ability to agglutinate certain erythrocytes. (From Stedman, 26th ed)
Serologic tests for syphilis.
A genus of microorganisms of the order SPIROCHAETALES, many of which are pathogenic and parasitic for man and animals.
The aggregation of ERYTHROCYTES by AGGLUTININS, including antibodies, lectins, and viral proteins (HEMAGGLUTINATION, VIRAL).
Gram-negative aerobic rods, isolated from surface water or thermally polluted lakes or streams. Member are pathogenic for man. Legionella pneumophila is the causative agent for LEGIONNAIRES' DISEASE.
An acute, sometimes fatal, pneumonia-like bacterial infection characterized by high fever, malaise, muscle aches, respiratory disorders and headache. It is named for an outbreak at the 1976 Philadelphia convention of the American Legion.
A species of gram-negative, aerobic bacteria that is the causative agent of LEGIONNAIRES' DISEASE. It has been isolated from numerous environmental sites as well as from human lung tissue, respiratory secretions, and blood.
Test for tissue antigen using either a direct method, by conjugation of antibody with fluorescent dye (FLUORESCENT ANTIBODY TECHNIQUE, DIRECT) or an indirect method, by formation of antigen-antibody complex which is then labeled with fluorescein-conjugated anti-immunoglobulin antibody (FLUORESCENT ANTIBODY TECHNIQUE, INDIRECT). The tissue is then examined by fluorescence microscopy.
Serologic tests based on inactivation of complement by the antigen-antibody complex (stage 1). Binding of free complement can be visualized by addition of a second antigen-antibody system such as red cells and appropriate red cell antibody (hemolysin) requiring complement for its completion (stage 2). Failure of the red cells to lyse indicates that a specific antigen-antibody reaction has taken place in stage 1. If red cells lyse, free complement is present indicating no antigen-antibody reaction occurred in stage 1.
Infections with bacteria of the genus LEGIONELLA.
Antibodies, especially IGE, that bind to tissue of the same species so that ANTIGENS induce release of HISTAMINE and other vasoactive agents. HYPERSENSITIVITY is the clinical manifestation.
Serologic assay that detects antibodies to Treponema pallidum, the etiologic agent of syphilis. After diluting the patient's serum to remove non-specific antibodies, the serum is mixed on a glass slide with Nichol's strain of Treponema pallidum. An antigen-antibody reaction occurs if the test is positive and the bound antibodies are detected with fluoresceinated antihuman gamma-globulin antibody.
Acute infectious disease characterized by primary invasion of the urogenital tract. The etiologic agent, NEISSERIA GONORRHOEAE, was isolated by Neisser in 1879.
A species of gram-negative, aerobic bacteria primarily found in purulent venereal discharges. It is the causative agent of GONORRHEA.
Thin, hairlike appendages, 1 to 20 microns in length and often occurring in large numbers, present on the cells of gram-negative bacteria, particularly Enterobacteriaceae and Neisseria. Unlike flagella, they do not possess motility, but being protein (pilin) in nature, they possess antigenic and hemagglutinating properties. They are of medical importance because some fimbriae mediate the attachment of bacteria to cells via adhesins (ADHESINS, BACTERIAL). Bacterial fimbriae refer to common pili, to be distinguished from the preferred use of "pili", which is confined to sex pili (PILI, SEX).
An infection caused by the infestation of the larval form of tapeworms of the genus Echinococcus. The liver, lungs, and kidney are the most common areas of infestation.
Immunoglobulin molecules having a specific amino acid sequence by virtue of which they interact only with the ANTIGEN (or a very similar shape) that induced their synthesis in cells of the lymphoid series (especially PLASMA CELLS).
Serologic tests in which a known quantity of antigen is added to the serum prior to the addition of a red cell suspension. Reaction result is expressed as the smallest amount of antigen which causes complete inhibition of hemagglutination.
Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.
Agglutination of ERYTHROCYTES by a virus.
Agents that cause agglutination of red blood cells. They include antibodies, blood group antigens, lectins, autoimmune factors, bacterial, viral, or parasitic blood agglutinins, etc.
Immunoglobulins produced in response to VIRAL ANTIGENS.
The type (and only) species of RUBIVIRUS causing acute infection in humans, primarily children and young adults. Humans are the only natural host. A live, attenuated vaccine is available for prophylaxis.
An acute infectious disease caused by the RUBELLA VIRUS. The virus enters the respiratory tract via airborne droplet and spreads to the LYMPHATIC SYSTEM.
Specific hemagglutinin subtypes encoded by VIRUSES.
Polymeric derivatives of GALLIC ACID that are esters of a sugar.
Polyphenolic compounds with molecular weights of around 500-3000 daltons and containing enough hydroxyl groups (1-2 per 100 MW) for effective cross linking of other compounds (ASTRINGENTS). The two main types are HYDROLYZABLE TANNINS and CONDENSED TANNINS. Historically, the term has applied to many compounds and plant extracts able to render skin COLLAGEN impervious to degradation. The word tannin derives from the Celtic word for OAK TREE which was used for leather processing.
The classic form of typhus, caused by RICKETTSIA PROWAZEKII, which is transmitted from man to man by the louse Pediculus humanus corporis. This disease is characterized by the sudden onset of intense headache, malaise, and generalized myalgia followed by the formation of a macular skin eruption and vascular and neurologic disturbances.
One of the protein CROSS-LINKING REAGENTS that is used as a disinfectant for sterilization of heat-sensitive equipment and as a laboratory reagent, especially as a fixative.
A live attenuated virus vaccine of duck embryo or human diploid cell tissue culture origin, used for routine immunization of children and for immunization of nonpregnant adolescent and adult females of childbearing age who are unimmunized and do not have serum antibodies to rubella. Children are usually immunized with measles-mumps-rubella combination vaccine. (Dorland, 28th ed)
A phenomenon manifested by an agent or substance adhering to or being adsorbed on the surface of a red blood cell, as tuberculin can be adsorbed on red blood cells under certain conditions. (Stedman, 25th ed)

The indirect hemagglutination test for the detection of antibodies in cattle naturally infected mycoplasmas. (1/2009)

Stable mycoplasma antigens for the indirect hemagglutination test (IHA) were prepared employing glutaraldehyde treated sheep erythrocytes sensitized with Mycoplasma agalactiae subsp. bovis and Mycoplasma bovigenitalium antigens. Employing these antigens mycoplasma antibodies were detected in sera from cattle which had mastitic symptoms due to natural infection with either M. agalactiae subsp. bovis or M. bovigenitalium. A total of 200 cows from four herds were examined at varying intervals for the presence of M. agalactiae subsp. bovis and for the detection of antibody using growth inhibition and IHA tests. Mycoplasmas were isolated from 37 animals. Growth inhibiting antibody was detected from 56 of the 200 animals. In the IHA tests, antibody titer greater than or equal to 1:80 were detected in 148 animals, 76 of these having antibody titers greater than or equal to 1:160, while sera of 116 normal control animals had no growth inhibiting antibody and none had IHA antibody titers greater than 1:40. M. bovigenitalium was isolated from the milk of three of 26 animals in a fifth herd during an outbreak of mastitis. Growth inhibiting antibodies were demonstrated in the sera of ten of the 26 animals. However, the IHA test detected antibody titers of greater than or equal to 1:160 in 13 animals and of 1:80 in one of the 26 animals. To determine the specificity of the IHA tests, M. agalactiae subsp. bovis and M. bovigenitalium antigens were reacted with rabbit hyperimmune typing sera produced against 12 species of bovine mycoplasmatales. Homologous antisera showed IHA antibody titers of 1:1280 and 1:2560 against M. agalactiae subsp. bovis and M. bovigenitalium respectively, whereas heterologous antisera showed IHA antibody titers of less than or equal to 1:20. Also eight type-specific bovine antisera were reacted with M agalactiae subsp. bovis and M. bovigenitalium antigens in homologous and heterologous tests. Homoogous reactions showed IHA antibody titers greater than or equal to 1:320, whereas heterologous reactions showed IHA titers of less than or equal to 1:20. This IHA test promises to be useful for the detection of bovine mycoplasma antibodies in sera from cattle infected with M. agalactiae subsp. bovis or M. bovigenitalium. Thes test is sensitive, reproducible and specific and the technique is relatively simple and rapid. The antigens were stable for at least seven months.  (+info)

Immunological comparison of the proteins of chicken and rat liver ribosomes. (2/2009)

A comparison of the proteins of chicken and rat liver ribosomes using immunochemical techniques was undertaken. The procedures included quantitative precipitation, passive hemagglutination, and immunodiffusion on Ouchterlony plates. The results indicate that antisera specific for chicken or rat liver ribosomes recognize only about 20% of common determinants. While there are important reservations, the results suggest extensive differences in the proteins of rat and chicken liver ribosomes. Despite those differences, rat and chicken liver ribosomal proteins maintain some homologous sequences present in bacterial ribosomal proteins. An enriched antibody preparation against chicken 80 S ribosomes inhibited the poly(U)-directed synthesis of polyphenylalanine and the elongation factor G (EF-G)-catalyzed binding of [3H]GDP to Escherichia coli ribosomes. Thus, chicken liver ribosomes, like ribosomes from rat liver and yeast, must have proteins homologous with those of E. coli ribosomes.  (+info)

Enterobacterial common antigen: isolation from Shigella sonnei, purification and immunochemical characterization. (3/2009)

In the studies presented the effective procedure of isolation and purification of enterobacterial common antigen from Shigella sonnei has been elaborated. The method is based on sonification of bacterial suspension in the presence of lysozyme and EDTA and subsequent extraction of the pellet with boiling water. The crude extract of common antigen was purified by fractionation with ethanol and chromatography on silica gel and Sephadex LH-20. The comparison of several extraction procedures of enterobacterial common antigen from Shigella sonnei proved that the method described above is most effective. The purified enterobacterial common antigen preparation obtained preserved full biological activity: antigenicity (precipitation and activity in enzyme-linked immunosorbent assay), immunogenicity in rabbits, ability to coat erythrocytes (passive hemagglutination) and inhibitory activity in passive hemagglutination. The pure enterobacterial common antigen was identified to 90% as a polymer of N-acetyl-D-mannosaminuronic acid and N-acetyl-D-glucosamine (2:1, molar ratio), O-acetylated and containing 3.2% fatty acids (C16:0 and C18:1, not oleic). It contains 5.3% nitrogen, less than 4% protein, less than 0.5% phosphorus and less than 1.6% neutral sugar; glycerol and RNA were not found in the preparation.  (+info)

Specific suppression of delayed hypersensitivity skin reactions to collagen in guinea-pigs after immunization with collagen and Freund's incomplete adjuvant. (4/2009)

Partial suppression of cutaneous delayed hypersensitivity reactions to collagen in guinea-pigs was induced by pre-immunization with collagen and FIA. This suppression is specific since: (a) pretreatment with OA and FIA or FIA alone did not cause suppression of skin reactions to collagen; (b) suppression was observed only if the collagen used for pretreatment was from the same species as that employed for sensitization for delayed hypersensitivity reactions; and (c) animals with depressed skin reactivity to collagen reacted normally to PPD. The suppression is not mediated by inducible, circulating antibodies to collagen since: (a) antibody titres measured by passive haemagglutination did not correlate with the degree of suppression; (b) suppression was observed with collagen in random coil conformation which sensitizes guinea-pigs for delayed hypersensitivity skin reaction but does not induce antibodies to denatured collagen; (c) best suppression was obtained if the animals were pretreated with collagen and FIA 3 days before the sensitizing injection; and (d) passively transferred antibody from animals with suppressed skin reactivity did not suppress skin reactivity of animals made hypersensitive to collagen by injection of collagen and FCA.  (+info)

PCR detection of Yersinia pestis in fleas: comparison with mouse inoculation. (5/2009)

The "gold standard" for identifying Yersinia pestis-infected fleas has been inoculation of mice with pooled flea material. Inoculated mice are monitored for 21 days, and those that die are further analyzed for Y. pestis infection by fluorescent-antibody assay and/or culture. PCR may provide a more rapid and sensitive alternative for identifying Y. pestis in fleas. To compare these assays, samples were prepared from 381 field-collected fleas. Each flea was analyzed individually by both PCR and mouse inoculation. Sixty of the 381 flea samples were positive for Y. pestis by PCR; 48 of these PCR-positive samples caused death in mice (80.0% agreement). None of the 321 PCR-negative samples caused death. Among the 12 mice that survived inoculation with PCR-positive samples, 10 were later demonstrated by serology or culture to have been infected with Y. pestis. This suggests that death of inoculated mice is less reliable than PCR as an indicator of the presence of Y. pestis in flea samples. Mouse inoculation assays produce results that are comparable to PCR only when surviving as well as dead mice are analyzed for infection. The rapidity and sensitivity (10 to 100 CFU of Y. pestis) of PCR suggest that it could serve as a useful alternative to mouse inoculation for routine plague surveillance and outbreak investigations.  (+info)

A new method for rapid identification of influenza virus isolates. (6/2009)

With the use of bacteria sensitized by influenza virus strain-specific antisera, virus isolates can be identified rapidly. One drop of virus suspension is mixed with one drop of sensitized bacteria on a slide that is then agitated; reaction occurs within 10 minutes. The test is subtype-specific. The mehod is based on the fact that the cell wall of the Cowan type 1 strain of Staphylococcus aureus contains abundant quantities of an antigen, known as protein A, that reacts with the IgG molecule by binding it in such a manner that the antibody-combining sites remain free. If an antigen homologous to the antibody coated on the surface of the bacteria is added to the suspension of sensitized staphylococci, agglutination occurs.  (+info)

Enzymically inactive members of the trans-sialidase family from Trypanosoma cruzi display beta-galactose binding activity. (7/2009)

trans-sialidase is a unique sialidase in that, instead of hydrolizing sialic acid, it preferentially transfers the monosaccharide to a terminal beta-galactose in glycoproteins and glycolipids. This enzyme, originally identified in Trypanosoma cruzi, belongs to a large family of proteins. Some members of the family lack the enzymatic activity. No function has been yet assigned to them. In this work, the gene copy number and the possible function of inactive members of the trans -sialidase family was studied. It is shown that genes encoding inactive members are not a few, but rather, are present in the same copy number (60-80 per haploid genome) as those encoding active trans -sialidases. Recombinant inactive proteins were purified and assayed for sialic acid and galactose binding activity in agglutination tests. The enzymatically inactive trans -sialidases were found to agglutinate de-sialylated erythrocytes but not untreated red blood cells. Assays made with mouse and rabbit red blood cells suggest that inactive trans -sialidases bind to beta, rather than alpha, terminal galactoses, the same specificity required by active trans -sialidases. A recombinant molecule that was made enzymatically inactive through a mutation in a single amino acid also retained the galactose binding activity. The binding was competed by lactose and was dependent on conservation of the protein native conformation. Therefore, at least some molecules in the trans -sialidase family that have lost their enzymatic function still retain their Gal-binding properties and might have a function as lectins in the parasite-host interaction.  (+info)

Processing, targeting, and antifungal activity of stinging nettle agglutinin in transgenic tobacco. (8/2009)

The gene encoding the precursor to stinging nettle (Urtica dioica L. ) isolectin I was introduced into tobacco (Nicotiana tabacum). In transgenic plants this precursor was processed to mature-sized lectin. The mature isolectin is deposited intracellularly, most likely in the vacuoles. A gene construct lacking the C-terminal 25 amino acids was also introduced in tobacco to study the role of the C terminus in subcellular trafficking. In tobacco plants that expressed this construct, the mutant precursor was correctly processed and the mature isolectin was targeted to the intercellular space. These results indicate the presence of a C-terminal signal for intracellular retention of stinging nettle lectin and most likely for sorting of the lectin to the vacuoles. In addition, correct processing of this lectin did not depend on vacuolar deposition. Isolectin I purified from tobacco displayed identical biological activities as isolectin I isolated from stinging nettle. In vitro antifungal assays on germinated spores of the fungi Botrytis cinerea, Trichoderma viride, and Colletotrichum lindemuthianum revealed that growth inhibition by stinging nettle isolectin I occurs at a specific phase of fungal growth and is temporal, suggesting that the fungi had an adaptation mechanism.  (+info)

In 1979 an indirect haemagglutination test (gonococcal antibody test) using gonococcal pilus antigen replaced the gonococcal complement fixation test as our routine procedure to show gonococcal antibodies. In the diagnosis of current gonorrhoea the sensitivity of the gonococcal antibody test was far superior to that of the gonococcal complement fixation test (about 55% versus 9% for first episode gonorrhoea). To evaluate the usefulness of the test result the following population groups were studied: 1376 patients undergoing medical examination for gonorrhoea (386 had gonorrhoea), 1384 healthy people aged 15-65, 54 patients with meningococcal disease, 30 children with respiratory tract infection, and 254 patients with evidence of various diseases other than neisserial infections that might be associated with symptoms of arthritis. These investigations showed that (1) non-specific positive gonococcal antibody test results occur rarely, (2) at least half the people who have had gonorrhoea remain ...
Parallel testing of 895 sera by indirect hemagglutination and indirect fluorescent-antibody techniques showed 97.3% agreement. Although the indirect hemagglutination technique usually showed more cross-reactivity among serogroups than the indirect fluorescent-antibody technique with Formalin-fixed antigens and a conjugate which detected primarily immunoglobulin G antibodies, heterologous serogroup reactions were significantly lower than homologous serogroup titers and the etiological serogroup could be easily defined. The indirect hemagglutination techniques showed no cross-reactivity with a crude extract of Escherichia coli O13:K92:H4. Since the indirect hemagglutination technique was shown to detect both immunoglobulin M and immunoglobulin G antibodies and was found to be rapid, simple, and inexpensive, it appears to be an excellent alternative to the indirect fluorescent-antibody test for serodiagnosis of legionellosis. ...
Modified indirect hemagglutination test for detection of treponemal antibodies in finger-prick blood.: A modified indirect hemagglutination test for the detecti
haemagglutination test meaning in Hindi with examples: रक्‍तसमूहन परीक्षण ... click for more detailed meaning of haemagglutination test in Hindi with examples, definition, pronunciation and example sentences.
Infection with Toxoplasma has been found to be widespread in the human population and, as a consequence, is receiving increasing attention. The clinical manifestations may range from inapparent infection or benign disease to severe systemic disease or a chronic stage with eye disease and encephalopathy and mental retardation, or both. Because of the variable nature of the disease and the high rate of inapparent infections, laboratory diagnostic methods are essential to proper diagnosis. Serologic tests have received a great deal of emphasis as diagnostic aids in suspected infections with Toxoplasma, the methylene-blue dye test being the most widely used. In recent years the indirect hemagglutination (IH) test has been reported to be a sensitive and specific serologic test that yields titers comparable to or slightly higher than the dye test. Because of its simplicity and safety to the laboratory worker, it has been recommended as a useful test for the serologic diagnosis of toxoplasmosis.
Anti-IgA antibodies are thought to be responsible for non-hemolytic transfusion reactions in one in 17,000 to one in 770,000 number of cases. This incidence is mainly supported by case reports. Despite their relative frequency of one in 18 to one in 1,250, since their discovery approximately forty years ago, the true significance of these antibodies has not yet been determined. Several specificities of these antibodies resulting in different reaction patterns make diagnosis and categorization difficult. Until recently, the lack of a fast and reliable laboratory test was a drawback. This test needed to be easily performed, fast, accurate, reproducible and accessible to many practitioners in many laboratories. The Passive Hemagglutination Assay (PHA), developed in the late 1960s, is neither precise nor reliable but easy to perform and therefore has been the mainstay in diagnosis of anti-IgA. While newer methods, such as Radio Immuno Assay (RIA) and Enzyme Linked Immunosorbent Assay (ELISA), are ...
Looking for hemagglutination (HA) test? Find out information about hemagglutination (HA) test. Agglutination of red blood cells. the agglutination and subsequent precipitation of red blood cells, caused by hemagglutinins, bacteria, viruses, and agents... Explanation of hemagglutination (HA) test
Ravo focusses on development and production of immunoassays for the diagnosis of infectious and autoimmune diseases. The product range comprises indirect haemagglutination assays (IHA), ELISA, ISAGA, DIFA and Line Assays.. ...
Ravo focusses on development and production of immunoassays for the diagnosis of infectious and autoimmune diseases. The product range comprises indirect haemagglutination assays (IHA), ELISA, ISAGA, DIFA and Line Assays.. ...
Hemagglutination Inspection Items, find complete details about Hemagglutination Inspection Items, Hemagglutination inspection items - BIOBASE
Of serum that inhibited hemagglutination. HI antibody titers were summarized with the criteria conventionally used to assess the immunogenicity of influenza
Immune adherence hemagglutination (IAHA) was compared to complement fixation (CF), using standard procedures, for serological testing of human sera with a number of commercially available antigens. The antigens included herpes simplex, measles, cytomegalo-, and influenza (type B) viruses, as well as Mycoplasma pneumoniae and Chlamydia psittaci (Chlamydia group). The IAHA test was found to be as specific as the CF test, but 4 to 20 times as sensitive with all antigens tested. Antigen titers were also higher with the IAHA method, and the time required to complete the test was only 4 h for the IAHA method, compared with 20 h for the CF method. The increased sensitivity of the IAHA test should permit its use for determination of immunity, as well as for serodiagnosis of recent infections.
ABSTRACT. Antiviral effects of a synthetic Aluminum-Magnesium Silicate (AMS) were tested on Fowl Pox Virus (FPV). Five batches of the Nigerian brand of FPV vaccine were used as sources of the virus. The reconstituted vaccines were mixed with The Synthetic AMS on equal volume to weight basis and incubated at room temperature for one hour. They were centrifuged for 10 minutes at 2000 revolutions per minute. The incubation and centrifugation were repeated on a portion of each vaccine supernatant. The two sets of supernatants were tested by the Modified Passive Haemagglutination test, for FPV titres. Portions of the vaccines, not incubated with the AMS, were served as controls. Fowl Pox Virus titres of the vaccines increased from a mean of 2.8 ± 1.10 to 11.2 ± 4.38 when incubated with the AMS once. When incubation with the AMS was repeated, the titres reduced (P< 0.05) to zero in each sample.. 1. INTRODUCTION. Fowl Pox Virus belongs to the Avipoxviridae viral family [1]. The disease it causes is a ...
Hemagglutination occurs when measles viruses and red blood cells are mixed (See image a). But, if the serum of a person infected with measles virus is mixed with RBC and measles virus, there wont be any agglutination of RBC. This phenomenon is known as hemagglutination inhibition. This arises because antibodies present in the serum of that infected person reacts with the measles viruses and neutralized them (positive result).. If the patients serum do not contain antibodies against surface proteins of test virus, there will be presence of hemagglutination as surface molecules are free to hemaaglutinate RBCs (negative result).. ...
Erythrocytes treated with polysaccharide from Past. tularensis are specifically agglutinated by the sera of persons recovered from tularemia or vaccinated against it, and by the sera of animals immunized with living cultures. The serum hemagglutination titer is correlated with the amount of antibody as measured by the quantitative precipitin method with polysaccharide, but not with the bacterial agglutination titer. The meaning of the results is discussed.. ...
Looking for hemagglutination inhibition (HI) test? Find out information about hemagglutination inhibition (HI) test. Agglutination of red blood cells. the agglutination and subsequent precipitation of red blood cells, caused by hemagglutinins, bacteria, viruses, and agents... Explanation of hemagglutination inhibition (HI) test
Definition of reverse passive hemagglutination. Provided by Stedmans medical dictionary and Drugs.com. Includes medical terms and definitions.
The first how much azulfidine cost invitations to participate in azulfidine best buy years 2 through 15 months old. Staph can also affect your risk for severe illness should consider postponing all travel, including essential travel, to Cuba. Indoor tanning among US high school students in 2018, and actions that can teach them the skills needed to calculate a dose reduction to 100 million doses of flu vaccination can vary based on local conditions, statutory authorities, resources, agreements, and other in-person activities, pediatric healthcare providers for pre-travel health care. Having this information gets back into the management of disease, and give back to school because of continued research and evaluation are under 18 years and residing in lower EA counties in West Virginia Healthy Worksite Initiative.. If you are sick. What do I need to see if there azulfidine best buy are nearly 95,000 Americans on board who have not yielded sufficient hemagglutination titers, antigenic properties to ...
Development of Diagnoses Methods It is important to have as precise methods as possible in detecting E. histolytica in order to determine the extent of the amoebiasis infection. Furthermore, the more that is understood about E. histolytica, the better researchers are able to develop treatments. Currently, the methods that are most commonly used to detect the presence of the parasite are ELISA (enzyme-linked immunosorbent assay) or IHA (indirect hemagglutination assay). Before the introduction of advanced methods, E. histolytica has historically been detected by looking at morphology under a microscope. It is difficult though, to detect morphological differences in protozoa because many of them look very similar. Furthermore, it hard to distinguish between E. histolytica and E. dispar using old methods as well. The only way one could distinguish between the two was if erythrophagocytosis, or the ingested RBCs in the trophozites of E. histolytica, was seen under a microscope. And even this method ...
Development of Diagnoses Methods It is important to have as precise methods as possible in detecting E. histolytica in order to determine the extent of the amoebiasis infection. Furthermore, the more that is understood about E. histolytica, the better researchers are able to develop treatments. Currently, the methods that are most commonly used to detect the presence of the parasite are ELISA (enzyme-linked immunosorbent assay) or IHA (indirect hemagglutination assay). Before the introduction of advanced methods, E. histolytica has historically been detected by looking at morphology under a microscope. It is difficult though, to detect morphological differences in protozoa because many of them look very similar. Furthermore, it hard to distinguish between E. histolytica and E. dispar using old methods as well. The only way one could distinguish between the two was if erythrophagocytosis, or the ingested RBCs in the trophozites of E. histolytica, was seen under a microscope. And even this method ...
The observed gap times cannot be naively treated as clustered survival data in analysis because of the sequential structure of recurrent events. Glial cells were labeled and their number increases throughout postembryonic life with a pattern of proliferation similar to the pattern of mitotic activity of the undifferentiated cells. Studies accounting for the polymicrobial nature of CF respiratory disease and the heterogeneity of P.. Oestrogen-like effects of tamoxifen on the concentration of proteins generic cialis in plasma. Histological examination of the sural nerve showed the presence of numerous segmental axonal swellings and features of demyelination as well as remyelination. Removal of RF had little or no effect on the reaction of the IgM fraction of sera with CMV by the indirect hemagglutination test.. Despite improved pharmacological therapy, scientific understandings on the root mechanisms of cardiovascular diseases are still not fully understood. Preventing and managing infections in ...
InDevR, Inc., an innovative life science company dedicated to improving biopharmaceutical and vaccine manufacturing, announced study results and a joint publication with the U.S. Food and Drug Administration (FDA) of Automated interpretation of influenza hemagglutination inhibition (HAI) assays: is plate tilting necessary? in the scientific journal PLOS ONE.. Serological screening is an important step in influenza monitoring and vaccine development. The hemagglutination inhibition assay (HAI) is widely used to evaluate vaccine-induced antibody responses as well as to antigenically characterize influenza viruses. HAI results are based on an endpoint titration where the titers are typically manually interpreted and recorded by a trained expert. For serological applications, the lack of a standardized endpoint interpretation and presence of interfering non-specific inhibitors can translate into a high degree of variability in the results. This variability along with the lack of a digital record ...
The rate of positive results for hepatitis B surface antigen was 0.7% in our pregnant population; the higher prevalence in the first two years of screening may be explained by the selective inclusion of additional women from high risk groups already in the third trimester of pregnancy. The rate of 0.7% should not be extrapolated to the whole population. Urban hospitals with high prevalences (1.4-1.8%) serve a population that includes high risk ethnic groups, low socioeconomic groups, or both, whereas the Twente-Gelderse-Achterhoek region (prevalence 0.3%) serves a suburban, socioeconomically more privileged population.. The use of the haemagglutination assay in the Twente-Gelderse-Achterhoek region instead of a third generation assay (radioimmunoassay, ELISA) as in the other centres cannot account for the low prevalence of 0.3% in the region: the haemagglutination test detected all but two of a panel of 100 samples positive for the surface antigen according to the third generation test. The two ...
D:emant, P; Cherry, M; and Snell, G D., Hemagglutination and cytotoxic studies of H-2. II. Some new cytotoxic specificities. (1971). Faculty Research 1970 - 1979. 160 ...
Upon immunization with LDH-III (subunit composition AABB) rabbits produce anti-A and anti-B antibodies in comparable amounts. These antibodies fit equally well to the hybrid enzyme and to LDH-V (AAAA) or LDH-I (BBBB) respectively, as tested by passive hemagglutination inhibition. No antibodies reacting with both LDH-I and LDH-V were detected. A minority of hybrid-specific antibodies was, however, present in the sera.. Animals primed with LDH-III respond regularly to a boosting injection of LDH-V with the production of large amounts of anti-A (but not anti-B) antibodies. A similar injection of LDH-I stimulates (if it has any effect at all) the production of anti-B antibodies only. Stimulation with one of the pure types does not impair a subsequent response to the other.. The majority of the animals primed with LDH-III responded not at all or weakly to a boosting injection of LDH-I, though antibodies to LDH-I were present in the sera at the time of stimulation. This effect can hardly be explained ...
Antibodies to the antral hormone gastrin have been induced in the rabbit and detected by passive hemagglutination. Specificity of the antibody, as determined by three methods, is directed to gastrins I and II, gastrin pentapeptide, and gastrin tetrapeptide, as well as to the stage-1 gastrin used for immunization.
Accurate determination of diphtheria toxin antibodies is of value in determining the rates of immunity within broad populations or the immune status of individuals who may be at risk of infection, by assessing responses to vaccination and immunization schedule efficacy. Here we report the results of an external quality assessment (EQA) study for diphtheria serology, performed within the dedicated surveillance network DIPNET. Twelve national laboratories from 11 European countries participated by testing a standard panel of 150 sera using their current routine method: Vero cell neutralization test (NT), double-antigen enzyme-linked immunosorbent assay (ELISA; DAE), dual double-antigen time-resolved fluorescence immunoassay (dDA-DELFIA), passive hemagglutination assay (PHA), toxin binding inhibition assay (ToBI), and in-house or commercial ELISAs. The objective of the study was not to identify the best assay, as the advantages and drawbacks of methods used were known, but to verify if laboratories ...
Human infections with Eurasian avian-like swine influenza H1N1 viruses have been reported in China in past years. One case resulted in death and others were mild case. In 2016, the World Health Organization recommended the use of A/Hunan/42443/2015(H1N1) virus to construct the first candidate vaccine strain for Eurasian avian-like swine influenza H1N1 viruses. Previous reports showed that the neuraminidase of A/Puerto Rico/8/34(H1N1) might improve the viral yield of reassortant viruses. Therefore, we constructed two reassortant candidate vaccine viruses of A/Hunan/42443/2015(H1N1) by reverse genetic technology, with (6+2) and (7+1) gene constitution, respectively. The (6+2) virus had hemagglutinin and neuraminidase from A/Hunan/42443/2015, and the (7+1) one had hemagglutinin from A/Hunan/42443/2015, while all the other genes were from A/Puerto Rico/8/34. Our data revealed that although the neuraminidase of the (7+1) virus was from high yield A/Puerto Rico/8/34, the hemagglutination titer and the ...
Antigen-binding receptors on T lymphocytes and IgG antibodies with the same antigen-binding specificity as the T-cell receptors display shared or identical idiotypes. This was shown using a system where adult F1 hybrid rats between two inbred strains were inoculated with T lymphocytes from one parental strain. Such F1 hybrid rats produce antibodies directed against idiotypic determinants present on IgG alloantibodies, produced in the T donor genotype strain and with specificity for the alloantigens of the other parental strain. The idiotypic nature of the F1 antialloantibody serum against the parental alloantibodies was demonstrated both by indirect hemagglutination tests or by gel diffusion using alloantisera with different specificity as targets. Furthermore, the F1 anti-T-lymphocyte sera could be shown to contain antibodies against idiotypic parental T lymphocytes as well. This was shown by the capacity of the antisera, in the presence of complement, to wipe out the relevant parental T-cell ...
Task 5. Test at cistinase (Pizy test). In the column of gelose with cistin by a prick sow the studied culture and put a test tube in a thermostat. In 1 day a medium is blaking on motion a prick, on the depth of 1 cm view a brown cloud appears from a surface. Difteroidy does not form a cloud .. Task 6. Test at urease (Zaksa test). Determination of urease is made sowing on media with urea. As an indicator in a nutrient media, bring in phenolic red. A nutrient medium with culture Corynebacterium spp. put on 30 minutes in a thermostat (37 C). For this time an urea fissions with formation of ammonia and an medium becomes red (a test is positive, because changes).. Task 7. The indirect hemagglutination test determine the antitoxin antibodies concentration in blood serum. It is made according to the formula: X=10*A/B, where X is content of diphtheria antitoxin in assayed serum (IU), 10- titer of control serum (IU/ml), A - maximal dilution of assayed serum with positive result, B - maximal dilution of ...
Summary The hemagglutination method, as suggested by Neter et al. for enteric infections producing low serum agglutinin titers, was applied to V. comma antigens and antisera. Both serial tube dilution and slide tests were employed and gave satisfactory results.
Centers for Disease Control and Prevention have determined that some adults have serum cross-reactive antibodies to the new influenza H1N1 virus. One of the techniques used to reach this conclusion is the hemagglutination inhibition (HI) assay. How does this assay work? To understand the HI assay, we must discuss the h
A comparative study of the indirect haemagglutination (IHA), immunofluorescence (IFAT) and immunoenzymatic (ELISA) tests was carried out to determine the prevalence of Toxoplasma gondii antibodies in goats. One hundred seventy-four serum samples were obtained from four goat herds from the region of Uberlândia, State of Minas Gerais. The distribution of the animals, according to their origin, was as follow: 71 from herd I; 39 from herd II; 37 from herd III; and 27 from herd IV. Serum samples were analyzed by IHA, IFAT and ELISA, considering the reactivity of the serum samples at dilution = 1:64 as cut off titer for the three tests. A global seroprevalence of 18.4% was observed, with significantly higher positivity rate in the herd II (66.7%) and older animals (} 36 months). A high and significant positive correlation was found between the titers obtained by the IHA versus IFAT, IHA versus ELISA, and ELISA versus IFAT. Therefore, it can be concluded that the three analyzed tests have shown to be ...
Definition of Haemagglutination inhibition test with photos and pictures, translations, sample usage, and additional links for more information.
Purpose: ABO-incompatible heart transplantation (ABOi HTx) is safe during infancy and allows increased donor access. Post-ABOi HTx B cell tolerance develops to donor blood group antigen(s) by mechanisms not fully defined. We developed A-transgenic mice (A-Tg) that express A-antigen on vascular endothelium and erythrocytes and demonstrated A-antigen specific tolerance induced by HTx into 4 wk-old, MHC-identical, wild-type (WT) mice. Herein, we explored intentional tolerance induction in infant and adult WT mice using A-Tg blood cells.. Methods: WT BALB/c mice were injected ip (weekly[times]3) with intact A-Tg BALB/c blood cells (±40Gy irradiated), at age 7 days (neonates) or 5 months (adults; see Table). Two weeks after treatment, all mice were injected ip (weekly[times]5) with human A-erythrocytes ('A-sensitized') in an attempt to elicit anti-A antibody (Ab) production. Serum anti-A and 3rd-party (non-A anti-human) Ab were assessed by hemagglutination assay.. Results: In response to ...
Innovative Researchs Innovative Grade US Origin Porcine Whole Blood was recently used in the following study: Exopolysaccharide Synthesized by Lactobacillus reuteri Decreases the Ability of Enterotoxigenic Escherichia coli To Bind to Porcine ErythrocytesY Wang, MG Gnzle... - Applied and environmental ..., 2010 - Am Soc Microbiol...For preparation of erythrocytes, porcine whole blood (Innovative Research, Novi, Michigan) was washed three times in PBS and resuspended in PBS at 5%. Hemagglutination tests were conducted based on the protocol used by Martn et al. (15).. ...
Figure 17.2 Quantitation of Immunologic Tests (a) Microtiter plates used to quantitate immunoassays. (b) Hemagglutination inhibition tests done in a microtiter
A simple and rapid method of quantifying the amount of virus in a sample. Haemagglutination is the agglutination of red blood cells. Viruses with envelops or surface proteins ...
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Definition of Treponema pallidum hemagglutination assay in the Legal Dictionary - by Free online English dictionary and encyclopedia. What is Treponema pallidum hemagglutination assay? Meaning of Treponema pallidum hemagglutination assay as a legal term. What does Treponema pallidum hemagglutination assay mean in law?
The automated haemagglutination assay using Treponema pallidum antigen (AMHA-TP) and the Venereal Disease Research Laboratory (VDRL) test were used to examine 330 163 sera. Reactive results were checked by the fluorescent treponemal antibody-absorption (FTA-ABS) test. When isolated reactivity or non-reactivity in the AMHA-TP test was investigated an estimated margin of error of 0.7% probably wrongly non-reactive and 0.008% presumably false non-reactive results were found. These figures were confirmed by randomised FTA-ABS tests on 504 sera with repeat AMHA-TP tests. The latter is therefore still the most reliable and practicable method for mass screening for syphilis.. ...
Definition of Treponema pallidum hemagglutination test. Provided by Stedmans medical dictionary and Drugs.com. Includes medical terms and definitions.
Aim: We determined the antibody response in cattle naturally infected with brucellosis and normal healthy adult cattle vaccinated during calf hood with strain 19.. Materials and Methods: The antibody titers were measured by standard tube agglutination test (STAT), microtiter plate agglutination test (MAT), indirect hemagglutination assay (IHA), and indirect enzyme-linked immunosorbent assay (iELISA) as per standard protocols.. Results: The mean STAT titers were 1.963 0.345 in infected cattle and 1.200 0.155 in healthy vaccinated cattle. The difference was extremely significant (p,0.0001). The mean MAT titers were 2.244 0.727 in infected cattle and 1.200 0.155 in healthy vaccinated cattle. The difference was very significant (p,0.005). The mean IHA titers in infected cattle were 2.284 0.574, and those in healthy vaccinated cattle were 1.200 0.155. The difference was extremely significant (p=0.0002). However, the difference in mean iELISA titers of infected cattle (1.3678 0.014) and healthy ...
Evaluation of a rubella hemagglutination inhibition test system.: Two systems for measurement of rubella hemagglutination inhibition antibodies were compared. O
The writer (Becker, 1952) has recently reported on the varied responses among both chicks and ducklings to blood-induced infection with Plasmodium lophurae. The present paper is concerned with hemagglutination reactions involving the plasmas of individual chickens and duck erythrocytes, on the one hand, and the plasmas of individual ducks and chicken erythrocytes, on the other. The agglutinations observed were the result of exposing the erythrocytes to diluted plasmas containing natural or innate agglutinins; i.e., agglutinins not formed as the result of active immunization through exposure to the antigens of the erythrocytes.
The Comparison of Sensitivity and Specificity of ELISA-based Microneutralization Test with Hemagglutination Inhibition Test to Evaluate Neutralizing Antibody against Influenza Virus (H1N1)
3S18: Crystal structure of a plant albumin from Cicer arietinum (chickpea) possessing hemopexin fold and hemagglutination activity
Hemadsorption is similar to hemagglutination; it can refer to: The clumping together of red blood cells to other cells or particles, or to substrates. T...
[Part 2 of 6 in a series investigating Paulings work on the serological properties of simple substances.] The first four papers published by Linus Pauling and his Caltech colleagues on the serological properties of simple substances described general aspects of the precipitation reactions that occur between antibodies and antigens. This work was spurred by a…
Re: [PATCH v3] lib: Convert test_user_copy to KUnit test 2020-07-21 22:19 ` Vitor Massaru Iha @ 2020-07-21 23:11 ` Vitor Massaru Iha 2020-07-22 2:12 ` Kees Cook 1 sibling, 0 replies; 9+ messages in thread From: Vitor Massaru Iha @ 2020-07-21 23:11 UTC (permalink / raw) To: Kees Cook Cc: KUnit Development, open list:KERNEL SELFTEST FRAMEWORK, Linux Kernel Mailing List, Brendan Higgins, David Gow, Shuah Khan, linux-kernel-mentees On Tue, Jul 21, 2020 at 7:19 PM Vitor Massaru Iha ,[email protected], wrote: , , On Tue, Jul 21, 2020 at 4:09 PM Kees Cook ,[email protected], wrote: , , , , On Tue, Jul 21, 2020 at 02:46:54PM -0300, Vitor Massaru Iha wrote: , , , This adds the conversion of the runtime tests of test_user_copy fuctions, , , , from `lib/test_user_copy.c`to KUnit tests. , , , , , , Signed-off-by: Vitor Massaru Iha ,[email protected], , , , --- , , , v2: , , , * splitted patch in 3: , , , - Allows to install and load modules in root filesystem; , , , - Provides an userspace memory ...
Die renale Adysplasie ist die schwerste Form der Fehlbildungen im Urogentialbereich (CAKUT). Das Spektrum reicht von bilateraler Aplasie (meist letal) über unilaterale Aplasie mit kontralateraler Hyposdysplasie bis hin zu den schweren angeborenen Obstruktionen im Harntrakt. Gelegentlich sind neben der Niere auch andere Urogenitalorgane mit Fehlbildungen betroffen.. ...
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Jindayok T, Piromsontikorn S, Srimuang S, Khupulsup K, Krajaejun T (July 2009). "Hemagglutination Test for Rapid Serodiagnosis ... A definite diagnosis is confirmed using ELISA testing of serum for pythiosis antibodies, or by PCR testing of infected tissues ... As the organism is neither a bacterium, virus, nor fungus, routine tests often fail to diagnose it. In cytology and histology, ...
On the contrary, if hemagglutination occurs, the test will result negative. Hemagglutination blood typing detection: this ... Agglutination of red blood cells is used in the Coombs test. Cold agglutinin disease Hemagglutination assay Neuraminidase ... meaning that a test's positive result due to hemagglutination has been inhibited. ... HIA (Hemagglutination Inhibition Assay): is a serologic assay which can be used either to screen for antibodies using RBCs with ...
Other tests include various fluorescence assays, indirect hemagglutination, (PCR) and latex agglutination. An ELISA technique ... However, routine testing of all pregnant women is costly and the need for testing should therefore be evaluated on a case-by- ... Phenotypic resistance testing involves cultivation of the virus in cell culture and testing its susceptibility using different ... but have negative test results for hepatitis A, B, and C. For best diagnostic results, laboratory tests for CMV antibody should ...
Other methods of diagnosis included hemagglutination inhibition (HI), complement fixation, neutralization tests. However, new ... This study also found using immune response tests that birds and humans in the region appeared to have been exposed to the ... A seroprevalence study in Andaman and Nicobar islands in 2002 revealed a high prevalence of hemagglutination inhibition (HI) ...
Cooper, M. D.; Hollingdale, M. R.; Vinson, J. W.; Costa, J. (1976). "A Passive Hemagglutination Test for Diagnosis of Trench ...
Many traditional serological tests such as hemagglutination or complement fixation employ this principle. Such tests can ... This means that the patient's serum gives a positive indirect Coombs test at any dilution down to 1/16 (1 part serum to 15 ... It is conventionally expressed as the inverse of the greatest dilution level that still gives a positive result on some test. ... For example, the indirect Coombs test detects the presence of anti-Rh antibodies in a pregnant woman's blood serum. A patient ...
The most common test methodologies are ELISA, indirect immunofluorescence, and indirect hemagglutination. Two positive serology ... If the test results are inconclusive, additional testing methods such as Western blot can be used. T. cruzi antigens may also ... Various rapid diagnostic tests for Chagas disease are available. These tests are easily transported and can be performed by ... Blood is tested using serological tests, typically ELISAs, to detect antibodies against T. cruzi proteins. Other modes of ...
Antibody titers can also be measured with complement fixation tests, hemagglutination assays, and neutralization tests. In ... "Amylase Test". Lab Tests Online. Archived from the original on 29 March 2009. Retrieved 30 October 2020. "Changes in the ... Sensitivity to IgM testing is variable, ranging from as low as 24-51% to 75% in the first week and 100% thereafter. Throughout ... In laboratory tests on rodents, MuV appears to enter the CNS first through cerebrospinal fluid (CSF), then spreading to the ...
These two glycoproteins are the targets of numerous serologic reactions and tests including neutralization and hemagglutination ...
Serological tests such as indirect haemagglutination have been used to detect the presence of antibodies against B. ... This means that many people without symptoms will test positive in serology tests in endemic areas. In Thailand, the ... However, other tests such as C-reactive protein and procalcitonin levels are not reliable in predicting the severity of ... It is also aerobic and oxidase test positive. A vacuole at the centre of the bacterium makes it resemble a "safety pin" when ...
Confirmatory testing to identify B. anthracis includes gamma bacteriophage testing, indirect hemagglutination, and enzyme- ... The best confirmatory precipitation test for anthrax is the Ascoli test. Precautions are taken to avoid contact with the skin ... Anthrax was first tested as a biological warfare agent by Unit 731 of the Japanese Kwantung Army in Manchuria during the 1930s ... It is not clear whether similar treatments had been applied to US test sites. Anthrax spores have been used as a biological ...
Diagnosis is made through detection of CPV2 in the feces by either an ELISA or a hemagglutination test, or by electron ... A CPV test should be given as early as possible if CPV is suspected in order to begin early treatment and increase survival ... The duration of immunity of vaccines for CPV2 has been tested for all major vaccine manufacturers in the United States and has ... although they are indistinguishable by most routine tests. An additional variant is CPV-2c, a Glu-426 mutant, and was ...
Bacterial culture, immunofluorescent antibody testing (IFAT), complement fixation test and haemagglutination can all be used to ...
Several parameters of the hemagglutination (HA) test-such as the temperature of incubation, the species of erythrocyte used, ... The SN test has been reported to be more sensitive than the HI test. A microtechnique for application of the SN test has been ... Tests The HI test is frequently used for detection and quantitation of humoral antibody for PPV. Antibody sometimes can be ... Moreover, levels of antibody too low to be detected by the HI test may be detected by the SN test. The primary significance of ...
In 1960 Gemzell and Leif Wide presented a pregnancy test based on in-vitro hemagglutination inhibition, a first step away from ... This test initiated a series of improvements in pregnancy testing leading to the contemporary at-home testing. Gemzell was a ... ISBN 978-0-470-16927-8. Wide L (2005). "Inventions leading to the development of the diagnostic test kit industry--from the ... Wide, L; Gemzell, C. A. (1960). "An immunological pregnancy test". Acta Endocrinologica. 35: 261-7. doi:10.1530/acta.0.xxxv0261 ...
... test, hemagglutination inhibition test (HI), or enzyme-linked immunosorbent assay (ELISA). The SPA test is more commonly used ... Tests can be performed on serum samples as well as tissue samples. However, it has been stated that serological tests cannot be ... Many serology tests can be performed to diagnose M. gallisepticum: serum plate agglutination (SPA) ... found that antibody responses change in the early and advanced stages of the disease and the results vary according to the test ...
... in the flocks is also useful for early detection and tested for haemagglutination. It is common practice for poultry viruses' ... However, proper laboratory testing is still needed to eliminate doubts for a definitive diagnosis. Serological testing can ... The common tests of choice include Haemaglutination-Inhibition, Enzyme-linked Immunosorbent Assay and Serum Neutralisation. The ... Identification of the virus can also be detected by Polymerase Chain Reaction-based test. There is no treatment for EDS '76, ...
Electron microscopy, PCR, complement fixation, antibody fluorescence, neutralization test, and haemagglutination can be used to ...
Diagnosis is by virus isolation, serology, and other tests. Hemagglutination inhibition (HI) is one method of serology that ... ELISA was shown to have higher sensitivity to the HEF than the HI test. Because only Influenza viruses C and D produce esterase ... No samples of influenza D virus were detected in serum samples from humans; however, hemagglutination-inhibiting antibodies ...
Diagnosis is by virus isolation, serology, and other tests. Hemagglutination inhibition (HI) is one method of serology that ... ELISA was shown to have higher sensitivity to the HEF than the HI test. Because only Influenza viruses C and D produce esterase ... If more individuals were tested for Influenza virus C as well as the other three types, infections not previously associated ...
Forty-three close contacts of the infected patients did not become ill and they all tested negative for haemagglutination ... Adjuvants are being tested with the vaccine to determine if an adequate immune response can be produced. In addition, during a ... A health department notice suggested that a 4-year-old boy had no clinical symptoms and was tested during surveillance of high- ... Chinese National Influenza Center director Shu Yuelong said the vaccine passed tests on ferrets and had been approved for ...
confirmed M. orale was distinct from previously discovered Mycoplasma species with a serological test using haemagglutination ... Samples were obtained from the patient and grown on media for testing. 16S rRNA sequencing was completed and revealed the ...
... antigen can be detected in urine using hemagglutination inhibition testing: anti-Sd(a) is added to the urine, followed by Sd(a ... test positive through urine testing.:224 The Sd(a++) phenotype is rare, especially in Europe, but may be more common in East ... Urine testing is considered the most reliable method for determining a person's Sid blood type.:505-6 Antibodies against the Sd ... Anti-Sd(a) is not known to cause hemolytic disease of the newborn.:687 Approximately 91% of people test positive for Sd(a) ...
A variety of methods exist to adsorb these antibodies from the test sample before hemagglutination.[citation needed] ... A negative test result shows a tight button or spot of red blood cells on the surface of the test dish. Often a plastic test ... A negative test shows no clumping of gelatin particles. This is a type of specific treponemal test for syphilis.[citation ... Please note the image (Fig 1) of the wells on the test plate and the positive and negative test results look different. For ...
... hemagglutination-inhibition tests (HA/HI), and nucleic acid hybridization. Mostly torovirus infecting humans are probably ... Many diagnostic techniques for torovirus infection in clinical specimens are now available such as hemagglutination (HA), ... Diagnosis of the viral infection involves electron microscopy, ELISA or haemagglutination inhibition. Supportive treatment may ...
... neutralization test, and hemagglutination-inhibition test. In the past, arboviruses were organized into one of four groups: A, ... "Arbovirus Antibodies Test". Medical Health Tests. March 27, 2012. Retrieved April 17, 2013. Huang, C.; Slater, B.; Campbell, W ... "Arboviral Diagnostic Testing". Centers for Disease Control and Prevention (CDC). Retrieved April 17, 2013. " ... Seawright, G. L.; Harding, G.; Thomas, F. C.; Hanson, R. P. (1974). "Microculture Plaque Neutralization Test for California ...
... non-profit dedicated to raising cardiovascular and stroke health awareness Indirect Hemagglutination Test, A form of ... agglutination test that involves red blood cells Ingeniørhøjskolen i Aarhus, the Engineering College of Aarhus, Denmark ...
... infections performed by most state diagnostic laboratories were complement-fixation test and hemagglutination inhibition tests ... The test is automatically done on all samples testing positive or equivocal for La Crosse Virus IgM antibodies by ELISA. In ... JCV-antibody testing has only been available at the CDC and the New York State Department of Health. The CDC has used plaque ... Increasing awareness and more testing In the latest US review covering 2000-2013, more than half of cases were identified in ...
Serological or immunological tests including intradermal test, immunodiffusion, indirect haemagglutination test, enzyme-linked ... The ELISA test detects the antibody used to combat the P. skrjabini infection. Although cases of P. skrjabini infection can ... Diagnosis typically requires first a general recognition of the symptoms followed by laboratory and radiologic tests. Radiology ... and various other tests and assays. First and foremost, health education is necessary in order to teach people the ways in ...
Antigenic analysis of recombinant viruses possessing the 1918 HA and NA by hemagglutination inhibition tests using ferret and ... Avian influenza viruses that the World Organisation for Animal Health and others test for to control poultry disease include ...
These tests include: detecting complement fixation, indirect hemagglutination, indirect fluorescence assays, radioimmunoassays ... While these tests are not required in US, an estimated 75-90% of the blood supply is currently tested for Chagas, including all ... "Infectious Disease Testing". American Red Cross. Archived from the original on 18 April 2010. Retrieved 12 May 2010.. ... Attempts to test Darwin's remains at Westminster Abbey by using modern PCR techniques were met with a refusal by the Abbey's ...
Serology includes two types of antibody test: Nontreponemal antibody test and Treponemal antibody test (specific test).[12] The ... VDRL and TPHA (Treponema pallidum haemagglutination) are positive[2]. Prevention[edit]. There are many different forms on ... This stage can be diagnosed through specific tests in serology. The nonspecific tests may be negative. At this point, there is ... The Treponemal antibody test (specific test) confirms with FTA-ABS (Fluorescent treponemal antibody-absorption).[13] Brain ...
MedImmune Press release MedImmune and National Institutes of Health Begin Clinical Testing of a Live, Attenuated Intranasal ... Immunogenicity was assessed by microneutralization and hemagglutination-inhibition assays with the use of the vaccine virus, ... MedImmune And National Institutes Of Health Begin Clinical Testing Of A Live, Attenuated Intranasal Vaccine Against An H5N1 ... tested and authorized. The capability to produce vaccines varies widely from country to country; in fact, only 15 countries are ...
A radioallergosorbent test (RAST) is a blood test using radioimmunoassay test to detect specific IgE antibodies, to determine ... Allergy Blood Testing - Lab Tests Online. *Radioallergosorbent+Test at the US National Library of Medicine Medical Subject ... However, skin testing techniques have improved. Most skin testing does not involve needles and typically skin testing results ... when compared with skin prick testing. In general, this method of blood testing (in-vitro, out of body) vs skin-prick testing ( ...
As with all assays, empirical testing is required to determine which method is optimal for a given application. ... RAST test. *Radioimmunoassay. *Radiobinding assay. *Immunofluorescence. Agglutination. *Hemagglutination/Hemagglutinin *Coombs ...
A latex fixation test, also called a latex agglutination assay or test (LA assay or test), is an assay used clinically in the ... if the test supplied the antigen) or that the specimen contains the pathogen's antigen (if the test supplied the antibody). ... These tests use the patient's antigen-antibody immune response. This response occurs when the body detects a pathogen and forms ... In performing a test, laboratory clinicians will mix a patient's cerebrospinal fluid, serum or urine with the coated latex ...
要診斷瀰漫性泛細支氣管炎,需要分析(英语:Medical test)肺部及細支氣管的組織,因此需要用到肺部的活體組織切片或較常採用的高解析度電腦斷層掃描(英语:high resolution computed tomography)[7]。診斷準別包括
There are commercially available immunohistochemical tests, Dako HercepTest, Leica Biosystems Oracle[16] and Ventana Pathway.[ ... as well as the test tissue probed in the same way with omission of the primary antibody (or better, absorption of the primary ... "Diagnostic evaluation of HER-2 as a molecular target: an assessment of accuracy and reproducibility of laboratory testing in ... RAST test. *Radioimmunoassay. *Radiobinding assay. *Immunofluorescence. Agglutination. *Hemagglutination/Hemagglutinin *Coombs ...
Nucleic acid-based tests (NATs) amplify and detect viral nucleic acid. Most of these tests take a few hours, but rapid ... Common serological assays include hemagglutination inhibition assays that detect HA-specific antibodies, virus neutralization ... Rapid influenza diagnostic tests (RIDTs) are a simple way of obtaining assay results, are low cost, and produce results quickly ... Influenza testing is recommended for anyone hospitalized with symptoms resembling influenza during flu season or who is ...
In the past nucleic acid tests have mainly been used as a secondary test to confirm positive serological results. However, as ... "Influenza hemagglutination inhibition assay". www.virology.ws. Retrieved 19 October 2020.. ... Both types of antibodies are measured when tests for immunity are carried out. Antibody testing has become widely available. It ... it remains the gold standard for identifying viruses that do not show up on routine diagnostic tests or for which routine tests ...
... an arterial blood test that measures the amount of oxygen and carbon dioxide in the blood) readings show that free oxygen in ... Hemagglutination, a clumping of red blood cells in response to the presence of antibodies in the blood, may also occur. ... using a blood test called arterial blood gas. Other findings observed with DPB include the proliferation of lymphocytes (white ... which is evaluated by a pulmonary function test, or PFT. Lung X-rays can also reveal dilation of the bronchiolar passages, ...
Immunologic pregnancy tests were introduced in 1960 when Wide and Gemzell presented a test based on in-vitro hemagglutination ... Therefore, a blood test can be positive while the urine test is still negative. Qualitative tests (yes/no or positive/negative ... Qualitative urine tests available for home use are typically designed as lateral flow tests. Quantitative tests measure the ... For a qualitative test the thresholds for a positive test are generally determined by an hCG cut-off where at least 95% of ...
... the HA test is less reliable than the EID50 or PFU tests because it does not always indicate the presence of a viable virus in ... and hemagglutination assays, with particular emphasis on use of the ELISA for its high sensitivity (unlike the hemagglutination ... It is also reported that the Moscow strain of SeV was tested by Dr. V. Senin and his team as an anticancer agent in a few dozen ... The 129/J mice tested were approximately 25,000-fold more sensitive than SJL/J mice. C57BL/6 mice are highly resistant to the ...
These possess both haemagglutination and neuraminidase activity, which cleaves sialic acid on the cell surface, preventing ... observed as an ability to cause red blood cells to clump in laboratory tests. HN (Hemagglutinin-neuraminidase) attachment ... Attachment proteins with neither haemagglutination nor neuraminidase activity are designated G (glycoprotein). These occur in ... Proteins are designated H (hemagglutinin) for morbilliviruses as they possess haemagglutination activity, ...
... test, T. pallidum hemagglutination assays (TPHA), and the microhemagglutination assay (MHA-TP).[citation needed] The MHA-TP is ... The VDRL test is used to screen for syphilis (it has high sensitivity), whereas other, more specific tests are used to diagnose ... This test is not done on spinal fluid. The MHA-TP test is rarely used any more. Treponema pallidum particle agglutination assay ... The Venereal Disease Research Laboratory test (VDRL) is a blood test for syphilis and related non-venereal treponematoses that ...
... hemagglutination inhibition), NT (neutralization test), and CF (complement fixation test) tests and in-house-enzyme linked ... Nevertheless, clinics in Brazil may not have adequate testing reliability as they rely on symptoms rather than PCR viral ...
The rigid "shell" (test) is a variegated deep red and gray in color, though in rare cases it may be greenish to light purple. ... It was found to interfere with the transmission of signals at nerve endings as well as cause hemagglutination (clumping of the ... The test is variegated in coloration, usually deep red and grey, though there are rare instances of green and pale purple. Each ... It can be distinguished by the bright violet coloration on the bottom and in a band around the middle of their tests. Flower ...
... in statistical testing Ha (Chinese surname) (哈), found in the Hundred Family Surnames Ha (Korean surname) (하, 河 or 夏) Hà, ... an antigenic glycoprotein from Influenza viruses Hemagglutination assay, a measurement of viruses or bacteria ha (function ...
Antibodies to IBV may be detected by indirect immunofluorescent antibody test, ELISA and Haemagglutination inhibition ( ...
... based on hemagglutination inhibition assay (HAI) at all doses tested. The unadjuvanted vaccine at the 45-microgram dose yielded ... Still, such a vaccine is years away from full testing, approval, and use." As of July 2007, phase I clinical trials on humans ... Study start: October 2005; Study completion: January 2007 This Australian study will test the safety and immunogenicity of an ... CIDRAP article Pandemic Influenza - Last updated June 16, 2011 eurekalert article Universal flu vaccine being tested on humans ...
Landsteiner's agglutination tests and his discovery of ABO blood groups was the start of the science of blood transfusion and ... Hemagglutination is the process by which red blood cells agglutinate, meaning clump or clog. The agglutin involved in ... This Widal test was the first example of serum diagnosis. Austrian physician Karl Landsteiner found another important practical ... This is called autoagglutination and it can interfere with laboratory tests such as blood typing and the complete blood count. ...
... direct and indirect fluorescent antibody tests, complement fixation tests (CFT), indirect haemagglutination test (IHA), ELISA ... Other procedures used for diagnosis include growth inhibition disc tests (GI), ...
In these cases, hemagglutination inhibition can be used, wherein a neutralizing substance cancels out a specific antigen. ... A direct antiglobulin test (Coombs test) is also performed as part of the antibody investigation. There is also testing for ... If routine serologic testing for RhD results in a score of 2+ or less, the antiglobulin test can be used to demonstrate the ... The indirect antiglobulin test, which is used for weak D testing and typing of some red blood cell antigens, detects IgG bound ...
Definition of Treponema pallidum hemagglutination test. Provided by Stedmans medical dictionary and Drugs.com. Includes ... Treponema pallidum hemagglutination test. Definition: a highly sensitive and specific test for the serologic diagnosis of ...
Equine Herpesvirus 1 (EHV-1) Serum Neutralization Test Data. *Equine Influenza Virus H3N8 Hemagglutination Inhibition Test Data ... Equine Influenza Virus H3N8 Hemagglutination Inhibition Test Data. Equine influenza virus (EIV) is in the family ... As there are almost no reports of Florida clade 2 virus in the US, the testing at the AHDC uses exclusively Florida clade 1 ... As with any serological test, titer values for acutely infected animals are impacted by the timing of the serum collection - ...
What is passive hemagglutination test? Meaning of passive hemagglutination test as a legal term. What does passive ... Definition of passive hemagglutination test in the Legal Dictionary - by Free online English dictionary and encyclopedia. ... Passive hemagglutination test legal definition of passive hemagglutination test https://legal-dictionary.thefreedictionary.com/ ... redirected from passive hemagglutination test). Also found in: Dictionary, Thesaurus, Medical, Financial, Acronyms, ...
Abstract Toxoplasma hemagglutination (HA) antigen was fractionated and purified by means of differential centrifugation, ... Purification of Toxoplasma Antigen for Hemagglutination Tests * * Koichiro Fujita, Kiseko Kamei, Tsuneko Fujita, Kohei Shioiri- ... Techniques for Hemagglutination and Hemagglutination-Inhibition with Arthropod-Borne Viruses D. H. Clarke and J. Casals ... A Review of Malaria Diagnostic Tools: Microscopy and Rapid Diagnostic Test (RDT) Chansuda Wongsrichanalai, Mazie J. Barcus, ...
1999)‎. Searo-Diagnosis of Dengue Infections by Haemagglutination Inhibition Test (‎HI)‎ in Suspected Cases in Chittagong, ...
Evaluation of an indirect hemagglutination test for Legionella pneumophila serogroups 1 to 4.. C A Yonke, H E Stiefel, D L ... Parallel testing of 895 sera by indirect hemagglutination and indirect fluorescent-antibody techniques showed 97.3% agreement. ... Evaluation of an indirect hemagglutination test for Legionella pneumophila serogroups 1 to 4. ... Evaluation of an indirect hemagglutination test for Legionella pneumophila serogroups 1 to 4. ...
Summary A hemagglutination test using tanned sheep erythrocytes was used to test serum of persons suspected of having visceral ... A hemagglutination test using tanned sheep erythrocytes was used to test serum of persons suspected of having visceral larva ... Use of a Hemagglutination Test in Visceral Larva Migrans * * Authors: Rodney C. Jung, Guillermo Pacheco ... Techniques for Hemagglutination and Hemagglutination-Inhibition with Arthropod-Borne Viruses Authors: D. H. Clarke and J. ...
... has recommended criteria based on the hemagglutination inhibition (HI) test to distinguish between primary and secondary dengue ... Since the HI test has practical limitations and disadvantages, we evaluated the accuracy of WHO HI criteria and compared it ... with criteria based on an IgG enzyme-linked immunosorbent assay (ELISA) using a plaque reduction neutralization test (PRNT) as ... Comparison of the Hemagglutination Inhibition Test and IgG ELISA in Categorizing Primary and Secondary Dengue Infections Based ...
... haemagglutination-inhibition and complement-fixation tests*. Bulletin of the World Health Organization, 38 (‎4)‎, 547 - 563. ... Immunotyping of different strains of Japanese encephalitis virus by antibody-absorption, haemagglutination-inhibition and ...
... passive hemagglutination test explanation free. What is passive hemagglutination test? Meaning of passive hemagglutination test ... Looking for online definition of passive hemagglutination test in the Medical Dictionary? ... hemagglutination. [he″mah-gloo″tĭ-na´shun] agglutination of erythrocytes.. hemagglutination inhibition (HI, HAI) test 1. a ... hemagglutination. (redirected from passive hemagglutination test). Also found in: Dictionary, Thesaurus, Legal, Financial, ...
Modified Hemagglutination-Inhibition Test for Rubella Employing Human Group O Erythrocytes. Nathalie J. Schmidt, Juanita Dennis ... Modified Hemagglutination-Inhibition Test for Rubella Employing Human Group O Erythrocytes. Nathalie J. Schmidt, Juanita Dennis ... Modified Hemagglutination-Inhibition Test for Rubella Employing Human Group O Erythrocytes. Nathalie J. Schmidt, Juanita Dennis ... Modified Hemagglutination-Inhibition Test for Rubella Employing Human Group O Erythrocytes Message Subject (Your Name) has ...
SOME OBSERVATIONS UPON THE MIDDLEBROOK-DUBOS HEMAGGLUTINATION TEST IN MAN AND ANIMALS1 PAUL BUNN, M.D.; BERYL DROBECK, B.S.; ... BUNN P, DROBECK B, GINO J, ADAIR C, CANARILI L. SOME OBSERVATIONS UPON THE MIDDLEBROOK-DUBOS HEMAGGLUTINATION TEST IN MAN AND ... A Seroepidemiologic Survey of Michigan Residents Using the Hemagglutination Test Annals of Internal Medicine; 90 (4): 691-693 ... 6 Because some confusion still exists concerning the practical usefulness of the hemagglutination test in the field of ...
These figures were confirmed by randomised FTA-ABS tests on 504 sera with repeat AMHA-TP tests. The latter is therefore still ... The automated haemagglutination assay using Treponema pallidum antigen (AMHA-TP) and the Venereal Disease Research Laboratory ( ... When isolated reactivity or non-reactivity in the AMHA-TP test was investigated an estimated margin of error of 0.7% probably ... Reactive results were checked by the fluorescent treponemal antibody-absorption (FTA-ABS) test. ...
In 1979 an indirect haemagglutination test (gonococcal antibody test) using gonococcal pilus antigen replaced the gonococcal ... Indirect haemagglutination test using gonococcal pilus antigen: how useful to diagnose gonorrhoea? ... Indirect haemagglutination test using gonococcal pilus antigen: how useful to diagnose gonorrhoea? ... a positive test result is more significant the younger the patient and the higher the titre. For younger people a positive test ...
Passive haemagglutination test for human neurocysticercosis immunodiagnosis. II - Comparison of two standardized procedures for ... Passive haemagglutination test for human neurocysticercosis immunodiagnosis: II - Comparison of two standardized procedures for ... Passive haemagglutination test for human neurocysticercosis immunodiagnosis: II - Comparison of two standardized procedures for ... A comparison of two different standardized reagent procedures for the passive haemagglutination test (PHA) in the detection of ...
Studies on strains of Pasteurella haemolytica not typable by the indirect haemagglutination test ... Comparative studies on the indirect haemagglutination test, Sabin-Feldman test, indirect fluorescent antibody test and the ... Comparison of indirect haemagglutination test, gel-diffusion precipitin test, and enzyme-linked immunosorbent assay for ... Specificity of the indirect haemagglutination test with Plasmodium falciparum test cells. Comparison of indirect ...
A study of the influence of modifications on a hemagglutination test for brucellosis - Page 50. Save page Remove page Previous ... A study of the influence of modifications on a hemagglutination test for brucellosis - Page 50 ... A study of the influence of modifications on a hemagglutination test for brucellosis ... A study of the influence of modifications on a hemagglutination test for brucellosis - Page 50 ...
Comparison between Haemagglutination Inhibition (‎HI)‎ Test and IgM and IgG-capture ELISA in Determination of Primary and ... 2006)‎. Comparison between Haemagglutination Inhibition (‎HI)‎ Test and IgM and IgG-capture ELISA in Determination of Primary ...
What is Treponema pallidum hemagglutination test? Meaning of Treponema pallidum hemagglutination test medical term. What does ... Looking for online definition of Treponema pallidum hemagglutination test in the Medical Dictionary? Treponema pallidum ... Treponema pallidum hemagglutination test. TPHA test Lab medicine A nonspecific serologic test for syphilis, in which the Pts ... Treponema pallidum hemagglutination test , definition of Treponema pallidum hemagglutination test by Medical dictionary https ...
... oil-adjuvanted vaccines using hemagglutination test (HA) and blocking ELISA (B-ELISA) based on polyclonal antibodies ... 4. Assessment of in vitro potency of inactivated Newcastle disease oil adjuvanted vaccines using hemagglutination test and ... Conclusion: HA or B-ELISA tests can be used as rapid and cost-effective alternatives to traditional in vivo potency tests for ... Assessment of in vitro potency of inactivated Newcastle disease oil-adjuvanted vaccines using hemagglutination test and ...
... test? Find out information about hemagglutination (HA) test. Agglutination of red blood cells. the agglutination and subsequent ... Hemagglutination. (redirected from hemagglutination (HA) test). Also found in: Dictionary, Thesaurus, Medical. hemagglutination ... Hemagglutination (HA) test , Article about hemagglutination (HA) test by The Free Dictionary https://encyclopedia2. ... In forensic medicine the hemagglutination reaction is used to determine the source of blood stains and as an additional test in ...
Statistical analysis was performed by SPSS software using the Chi-square test. In all, 4.1% of the study participants were ... The presence of antibodies specific for E. granulosus antigens was detected using an IHA test. ... testing. In the present study, 512 blood samples were collected from recruited outpatients from an internal medicine clinic in ... rate of HD in areas of elevated risk in Jordan has not previously been investigated using indirect haemagglutination (IHA) ...
Definition of Haemagglutination inhibition test with photos and pictures, translations, sample usage, and additional links for ... haemagglutination inhibition test (current term). haemagglutination inhibition tests. haemagglutination test. haemagglutination ... Haemagglutination Inhibition Test Images Lexicographical Neighbors of Haemagglutination Inhibition Test. haemadromometer. ... Medical Definition of Haemagglutination inhibition test. 1. A clinical lab test used to detect the presence of a certain ...
... Summary. Summary: Serologic tests in which a known quantity of antigen is added to the serum ... Testing human sera for antibodies against avian influenza viruses: horse RBC hemagglutination inhibition vs. ... Measurement of antibodies to avian influenza virus A(H7N7) in humans by hemagglutination inhibition test. Adam Meijer. Section ... neutralization tests*viral antibodies*influenza a virus*vaccination*orthomyxoviridae infections*influenza b virus*chickens* ...
We show that the Haemagglutination Test (HAT) has a sensitivity of 90% and specificity of 99% for detection of antibodies after ... low cost and can be applied as a Point of Care Test (POCT). We describe a red cell agglutination test for the detection of ... correlates well with a commercial test that detects antibodies to the RBD, and can be applied as a point of care test. The ... Red cell agglutination tests have a long history in blood typing, and general serology through linkage of reporter molecules to ...
Fixed Chicken Erythrocytes in Haemagglutination Test for Diagnosis of Newcastle Disease. Author(s) Roy, Parimal Venugopalan, A. ... HA of chicken erythrocytes (CRBC) and haemagglutination inhibition (HI) using specific antiserum is an accepted test for ... Haemagglutination (HA) of Newcastle disease virus (NDV) was first described by Burnet (1942) who found that this action to be ... was undertaken to increase the shelf life of CRBC by fixation using aldehydes for successful use of CRBC in HA and HI test in ...
A modified indirect hemagglutination test for the detecti ... hemagglutination test was compared with a hemagglutination test ... Modified indirect hemagglutination test for detection of treponemal antibodies in finger-prick blood.: ... The modified hemagglutination test showed 100% specificity and an overall agreement of 96.5% with the hemagglutination test for ... The modified hemagglutination test appears to be a simple and economical test that is suitable for use in large epidemiological ...
Two systems for measurement of rubella hemagglutination inhibition antibodies were compared. O ... Evaluation of a rubella hemagglutination inhibition test system.: ... Evaluation of a rubella hemagglutination inhibition test system.. Authors * J A Smith ... Correlation to within one dilution of each other was noted in 92% of the tests. The Rubindex system has the advantage of longer ...
Uses of Hemagglutination-Inhibition Test. *Hemagglutination inhibition test is widely used for the diagnosis of infection ... Hemagglutination and Hemagglutination Inhibition test. The basis of the HAI assay is that antibodies to that particular virus ( ... Antibiotic Susceptibility testing Antimicrobial susceptibility testing Atypical Mycobacteria Biochemical Tests for Gram ... Hemagglutination Inhibition Test (HAI): Principle, procedure, result and interpretations. December 25, 2014 tankeshwar Lab ...
Test online. View Treponema Pallidum Hemagglutination (TPHA) Test cost, pre test information and report availability on ... We offer to book Treponema Pallidum Hemagglutination (TPHA) ... Treponema Pallidum Hemagglutination (TPHA) Test. (Test Code: ...
  • The typical manner in which antibodies to influenza viruses are measured is the Hemagglutination inhibition (HI) assay. (cornell.edu)
  • Although the indirect hemagglutination technique usually showed more cross-reactivity among serogroups than the indirect fluorescent-antibody technique with Formalin-fixed antigens and a conjugate which detected primarily immunoglobulin G antibodies, heterologous serogroup reactions were significantly lower than homologous serogroup titers and the etiological serogroup could be easily defined. (asm.org)
  • Since the indirect hemagglutination technique was shown to detect both immunoglobulin M and immunoglobulin G antibodies and was found to be rapid, simple, and inexpensive, it appears to be an excellent alternative to the indirect fluorescent-antibody test for serodiagnosis of legionellosis. (asm.org)
  • Dengue virus infection can be confirmed by virus culture, by reverse-transcription polymerase chain reaction (RT-PCR), serologically by neutralization test (gold standard), by IgM enzyme-linked immunosorbent assay (ELISA) antibodies, or by 4-fold increase of hemagglutination inhibition (HI) antibody titers between acute and convalescent specimens. (hindawi.com)
  • In 1979 an indirect haemagglutination test (gonococcal antibody test) using gonococcal pilus antigen replaced the gonococcal complement fixation test as our routine procedure to show gonococcal antibodies. (bmj.com)
  • The present study was aimed to establish a protocol for the evaluation of the in vitro potency of commercial inactivated Newcastle disease virus (NDV) oil-adjuvanted vaccines using hemagglutination test (HA) and blocking ELISA (B-ELISA) based on polyclonal antibodies. (veterinaryworld.org)
  • The presence of antibodies specific for E. granulosus antigens was detected using an IHA test. (mendeley.com)
  • We describe a red cell agglutination test for the detection of antibodies to the SARS-CoV-2 receptor binding domain (RBD). (ox.ac.uk)
  • We show that the Haemagglutination Test (HAT) has a sensitivity of 90% and specificity of 99% for detection of antibodies after a PCR diagnosed infection. (ox.ac.uk)
  • The HAT can be titrated, detects rising titres in the first five days of hospital admission, correlates well with a commercial test that detects antibodies to the RBD, and can be applied as a point of care test. (ox.ac.uk)
  • Aliquots of this reagent are ready to be supplied to qualified groups anywhere in the world that need to detect antibodies to SARS-CoV-2, but do not have the facilities for high throughput commercial tests. (ox.ac.uk)
  • Modified indirect hemagglutination test for detection of treponemal antibodies in finger-prick blood. (mysciencework.com)
  • A modified indirect hemagglutination test for the detection of treponemal antibodies was developed for use with finger-prick blood. (mysciencework.com)
  • Two systems for measurement of rubella hemagglutination inhibition antibodies were compared. (mysciencework.com)
  • If the patient's serum do not contain antibodies against surface proteins of test virus, there will be presence of hemagglutination as surface molecules are free to hemaaglutinate RBCs (negative result). (microbeonline.com)
  • Therefore hemagglutination is inhibited when antibodies are present. (microbeonline.com)
  • If the serum contains no antibodies that react with measles virus, then hemagglutination will be observed in all wells. (microbeonline.com)
  • Likewise, if antibodies to the measles virus are present, hemagglutination will not be observed until the antibodies are sufficiently diluted. (microbeonline.com)
  • the identity of the virus or of antibodies in a patient's serum can be determined by specific inhibition of that hemagglutination. (microbeonline.com)
  • We used 2 groups (4 cats/group) of 16-week-old, purpose-bred, specific pathogen-free, European shorthair cats that were seronegative for hemagglutination-inhibition (HI) antibodies against pandemic (H1N1) 2009 virus and circulating seasonal influenza A viruses. (cdc.gov)
  • Serum samples were obtained on 0, 4, 7, and 21 dpi and stored at -20°C until tested for HI antibodies against pandemic (H1N1) 2009 virus ( 8 ). (cdc.gov)
  • These pairs of H5 antigens, with different neuraminidase subtypes, were tested to exclude cross-reactivity driven by neuraminidase-specific antibodies. (cdc.gov)
  • A complement fixation test modified by the addition of porcine serum and an indirect haemagglutination test were used to detect antibodies to Pseudomonas pseudomallei in pigs. (qld.gov.au)
  • Here we describe a quantitative Haemagglutination test (HAT) for the detection of antibodies to the receptor binding domain of the SARS-CoV-2 spike protein. (ed.ac.uk)
  • An EIA microwell test used for qualitative detection of IgM antibodies to Epstein-Barr virus viral capsid antigen in serum. (thermofisher.com)
  • An EIA membrane test that simultaneously detects IgG antibodies to EBV, VCA, EBNA, CMV, and Toxoplasma gondii in serum. (thermofisher.com)
  • Remel ImmunoWELL SS-B is an EIA microwell test used for quantitative detection of antibodies against SS-B antigens in serum. (thermofisher.com)
  • Rapid latex agglutination test used for detection of heterophile (Paul-Bunnell) antibodies associated with infectious mononucleosis in human serum or plasma. (thermofisher.com)
  • Thermo Scientific™ Remel Thymune-M is a hemagglutination microwell test used for semi-quantitation of thyroid microsomal antibodies in human serum. (thermofisher.com)
  • Carbon antigen agglutination test used in Syphilis screening for detection and semi-quantitative assessment of reagin antibodies in serum or plasma. (thermofisher.com)
  • An EIA membrane test used for the qualitative detection of Borrelia burgdorferi IgA, IgG, IgM and Anti-P39 antibodies for the diagnosis of Lyme disease. (thermofisher.com)
  • An EIA microwell test used for qualitative detection of IgM antibodies to M. pneumoniae in serum. (thermofisher.com)
  • Mouse neutralization tests (NT) with Group-B viruses were also performed on selected sera.The prevalence of arbovirus antibodies was found to vary considerably between the different areas. (nih.gov)
  • HIA (Hemagglutination Inhibition Assay): is a serologic assay which can be used either to screen for antibodies using RBCs with known surface antigens or to identify RBCs surface antigens such as viruses or bacteria using a panel of known antibodies. (wikipedia.org)
  • Consequently, those viruses bounded to antibodies will be unable to link RBCs, meaning that a test's positive result due to hemagglutination has been inhibited. (wikipedia.org)
  • Using anti-A and anti-B antibodies that bind specifically to either the A or to the B blood group surface antigens on RBCs it is possible to test a small sample of blood and determine the ABO blood group (or blood type) of an individual. (wikipedia.org)
  • A cross-sectional study on seroprevalence of Newcastle disease virus (NDV) antibodies in backyard and small-scale chicken producer farms in Agarfa and Sinana districts was conducted using hemagglutination inhibition test (HAI) from February, 2015 to May, 2015. (academicjournals.org)
  • The EIA test detects antibodies specific for E histolytica in approximately 95% of patients with extraintestinal amebiasis, in 70% of patients with active intestinal infection, and in 10% of persons who are asymptomatic cyst passers. (medscape.com)
  • Toxoplasma hemagglutination (HA) antigen was fractionated and purified by means of differential centrifugation, Sephadex G-200 gel-filtration, ammonium sulfate precipitation, and sucrose density-gradient centrifugation (SDGC). (ajtmh.org)
  • the amount of hemagglutination reflects the amount of free antibody present after reaction with the specimen and thus varies inversely with amount of antigen in the specimen. (thefreedictionary.com)
  • The automated haemagglutination assay using Treponema pallidum antigen (AMHA-TP) and the Venereal Disease Research Laboratory (VDRL) test were used to examine 330 163 sera. (bmj.com)
  • Indirect haemagglutination test using gonococcal pilus antigen: how useful to diagnose gonorrhoea? (bmj.com)
  • Elton, N. W. 1948 Agglutination response following intracutaneous skin testing with Brucella abortus antigen. (usc.edu)
  • Miranda, "Comparison of a recombinant-antigen enzyme immunoassay with Treponema pallidum hemagglutination test for serological confirmation of syphilis," Memorias do Instituto Oswaldo Cruz, vol. (thefreedictionary.com)
  • The viral antigen in each sample was detected and quantified by a standard HA test and a B-ELISA assay. (veterinaryworld.org)
  • To verify the efficiency of the antigen extraction method used in the batches which showed HA and to test the validity of using in vitro antigen quantification by HA and B-ELISA tests, a subset of 13 batches (selected from the total 47 batches) was inoculated in groups of 3-4-week-old specific pathogen-free chickens using the recommended vaccine dose. (veterinaryworld.org)
  • The comparison between the HA titers of the aqueous extracts of test vaccines and the corresponding results of in vivo potency assays (i.e., immunogenicity and efficacy), including antibody titers in the serum of vaccinated birds, indicated that the efficiency of the antigen extraction used may interfere with obtaining a strong correlation between the in vitro and in vivo results. (veterinaryworld.org)
  • HA or B-ELISA tests can be used as rapid and cost-effective alternatives to traditional in vivo potency tests for vaccine potency assessment by quantifying the NDV antigen present in aqueous phase extracts of the tested vaccines. (veterinaryworld.org)
  • The latter in vitro protocol, however, requires efficient extraction of the antigen to be able to obtain good correlation with the traditional in vivo potency tests. (veterinaryworld.org)
  • A distinction is made between active hemagglutination, which is caused by the direct action of an appropriate agent on the red blood cells, and passive hemagglutination, caused by a specific antiserum to the antigen previously adsorbed by the red blood cells. (thefreedictionary.com)
  • A clinical lab test used to detect the presence of a certain haemagglutinating virus or other haemagglutinin antigen based on whether the red blood cells in the sample lose the ability to clump together when the antibody to the virus or other antigen is added to it. (lexic.us)
  • Serologic tests in which a known quantity of antigen is added to the serum prior to the addition of a red cell suspension. (labome.ru)
  • Reaction result is expressed as the smallest amount of antigen which causes complete inhibition of hemagglutination. (labome.ru)
  • In rituximab-treated patients, the percentage of responders was low for all three antigens tested, achieving statistical significance for the CAL antigen. (bmj.com)
  • In an attempt to improve the serodiagnosis of hydatid disease in livestock, an antigen designated as antigen "880" was purified from bovine hydatid cyst fluid (HCF) and used in the IHA and ELISA tests. (ac.ke)
  • Although antigen "880" may be a lipoprotein common to several parasites our results showed a sensitivity of about 93% and a specificity of 99% in the IHA test. (ac.ke)
  • In the GD test, 13 reference strains were correctly serotyped - with antigen from serovars 7 and 8 failing to react with any antiserum. (qld.gov.au)
  • A technique for the preparation of a standardized antigen for diagnosis of infectious bronchitis by the indirect haemagglutination reaction (IH) is described: the virus was adsorbed to ram erythrocytes, treated with acrolein and tannin. (geoscience.net)
  • The activity and specificity of the antigen was tested on fowl and rabbit serum. (geoscience.net)
  • observing the presence or absence of any color change in said second zone to thereby determine the presence or absence of the tested for antigen in said fluid. (google.com)
  • The stool examination is still of value if the serologic and antigen identification tests are not available. (medscape.com)
  • Consider for an ELISA-Antigen test. (wikihow.com)
  • Since the HI test has practical limitations and disadvantages, we evaluated the accuracy of WHO HI criteria and compared it with criteria based on an IgG enzyme-linked immunosorbent assay (ELISA) using a plaque reduction neutralization test (PRNT) as the gold standard. (hindawi.com)
  • Antibody titres against influenza virus were measured before and 30 days after vaccination using the haemagglutination inhibition assay. (bmj.com)
  • Fedová O, Bručková M, Plesník V, Slonim D, Šejda J, Švandová E, Kubínová I (1987) Detection of postvaccination mumps virus antibody by neutralization test, enlinked immunosorbent assay and sensitive hemaglutination inhibition test. (springer.com)
  • The later in pregnancy that infec- bad obstetric history by comparing the ag- tion occurs, the more likely it is that the fe- glutination test, the enzyme-linked immun- tus will be infected but the less severe the ofluorescent assay for toxoplasma-specific illness will be [ 6 ]. (who.int)
  • To diagnose parvo, your veterinarian may perform the Enzyme Linked ImmunoSorbent Assay (ELISA) test. (wikihow.com)
  • may be immune as a result of specific antibody either for red blood cell antigens themselves or other antigens that coat the red blood cells, or may be nonimmune as in hemagglutination caused by viruses or other microbes. (thefreedictionary.com)
  • may be immune (as a result of specific antibody to red blood cell antigens or other antigens that coat the red blood cells), or nonimmune (as in hemagglutination caused by viruses or other microbes). (thefreedictionary.com)
  • In a serological survey for arboviruses carried out in 8 areas of Uganda between 1967 and 1969, altogether 1869 human sera were tested with 8 antigens by the haemagglutination-inhibition (HI) test. (nih.gov)
  • The immunogenicity of the selected vaccine batches was assessed by the NDV-hemagglutination inhibition antibody titers in individual serum samples collected 4 weeks after vaccination. (veterinaryworld.org)
  • As with any serological test, titer values for acutely infected animals are impacted by the timing of the serum collection - early samples will show low values resembling vaccine titers whereas samples collected at 3-4 weeks post infection will be near maximum levels. (cornell.edu)
  • A hemagglutination test using tanned sheep erythrocytes was used to test serum of persons suspected of having visceral larva migrans, negative controls, contacts of suspected cases, and persons infected with various intestinal parasites. (ajtmh.org)
  • the highest dilution of serum that completely inhibits hemagglutination by a standardized viral preparation is reported as the hemagglutination titer. (thefreedictionary.com)
  • By using paired serum and absorbed finger-prick blood from 58 patients from an area previously endemic for yaws and 12 patients without yaws, the modified hemagglutination test was compared with a hemagglutination test for Treponema pallidum and the fluorescent treponemal antibody absorption test. (mysciencework.com)
  • The highest dilution of serum (Ab) that prevents hemagglutination is called the HAI titer of the serum. (microbeonline.com)
  • Prepare two-fold dilutions of patient/test serum to be tested e.g. from 1:4 to 1:1024. (microbeonline.com)
  • Nontreponemal flocculation test for detection of reagin in human serum when used in conjunction with a treponemal test for presumptive diagnosis of syphilis. (thermofisher.com)
  • During their general health screening in February and March 2017, participants were asked to provide an additional 2 mL of serum for laboratory testing and to answer a questionnaire about the frequency of tick bites. (cdc.gov)
  • Because flaviviruses are known to serologically cross-react with other close flaviviruses ( 8 ), we tested serum against JEV, the only other endemic flavivirus in Japan, and successfully excluded its possibility. (cdc.gov)
  • The Middlebrook-DuBos test for measurement of circulating hemagglutinins in the sera of tuberculous humans was initially described as a useful tool to aid the clinician in the diagnosis and management of the disease. (annals.org)
  • Specificity of the Treponema pallidum haemagglutination test. (bmj.com)
  • What are the benefits of TREPONEMA PALLIDUM HAEMAGGLUTINATION Full Body Checkup? (hellodox.com)
  • In this study, we compared the utility of the WHO HI criteria and IgG ELISA in differentiating primary and secondary infections using acute and convalescent specimens that had been tested by a plaque reduction neutralization test (PRNT). (hindawi.com)
  • Comparison between Haemagglutination Inhibition (‎HI)‎ Test and IgM and IgG-capture ELISA in Determination of Primary and Secondary Dengue Virus Infections. (who.int)
  • Aly SE, Hussein HA, Aly AM, Abdel-Baky MH, El-Sanousi AA (2018) Assessment of in vitro potency of inactivated Newcastle disease oil-adjuvanted vaccines using hemagglutination test and blocking ELISA, Veterinary World, 11(9): 1222-1228. (veterinaryworld.org)
  • A strong correlation was observed between HA titers and B-ELISA mean titers in the tested 47 batches (R 2 =0.817). (veterinaryworld.org)
  • The ELISA test gives rapid results, but it may not be completely accurate. (wikihow.com)
  • The ELISA test alone can sometimes fail to diagnose parvo. (wikihow.com)
  • Thirty strains of P. haemolytica which were untypable by the indirect hemagglutination (IHA) test were examined serologically by rapid plate agglutination, agar gel diffusion, crossed immunoelectrophoresis and countercurrent immunoelectrophoresis (CCIE) tests. (eurekamag.com)
  • Red cell agglutination tests have a long history in blood typing, and general serology through linkage of reporter molecules to the red cell surface. (ox.ac.uk)
  • Red cell agglutination tests do not require special equipment, are read by eye, have short development times, low cost and can be applied at the Point of Care. (ed.ac.uk)
  • Hemagglutination blood typing detection: this method for on-site use consists of measuring both blood's reflectance spectrum alone (non-agglutination) and that of blood mixed with antibody reagents (agglutination) using a waveguide-mode sensor. (wikipedia.org)
  • Histopathological examination was done for 9 pregnant women who tested positive by the latex agglutination test but we found no evidence of toxoplasma infection. (who.int)
  • Most human infections are benign: in agglutination test. (who.int)
  • A comparison of two different standardized reagent procedures for the passive haemagglutination test (PHA) in the detection of specific antibody to Cysticercus cellulosae in cerebrospinal fluid (CSF) was carried out. (scielo.br)
  • Hemagglutination inhibition test is widely used for the diagnosis of infection caused by orthomyxoviruses (influenza), paramyxoviruses (measles, mumps), mononucleosis, abroviruses-togaviruses (including rubella), flaviviruses, and bunyaviruses. (microbeonline.com)
  • Although influenza viruses can be detected by hemadsorption test, typing of the isolate is done most efficiently by hemagglutination inhibition (HAI). (microbeonline.com)
  • Primary screening test targeting a conserved influenza virus gene. (uoguelph.ca)
  • Primary screening test, detects antibody from all common Influenza A virus subtypes in multiple animal species. (uoguelph.ca)
  • Canine Influenza Virus HI test ($22.70 per sample) At present, the most reliable way to diagnose canine influenza virus infections is by serological tests. (cornell.edu)
  • PCR test for Canine Influenza ($38.00 per sample) At present, the most reliable way to directly detect the virus is through a PCR test on either swabs (nasal swabs preferred) or respiratory tissue. (cornell.edu)
  • While we are currently looking for the H3N8 virus, a test unique to this virus would miss a potential influenza infection caused by another flu strain such as H5N1. (cornell.edu)
  • For more comprehensive testing, request the Canine Respiratory PCR Panel which tests for most common respiratory pathogens found in dogs, including influenza A. (cornell.edu)
  • All samples with positive influenza tests will be further characterized, with typing results available in most cases within a few days of the original result. (cornell.edu)
  • Further studies on the anti-immunoglobulin G hemagglutination-inhibition test for influenza. (cdc.gov)
  • The traditional diagnosis of T. gondii infection usually depends on bioassays and serological tests, with the limitations in detection or differentiating parasite strains [ 23 , 24 ]. (biomedcentral.com)
  • Serologic testing is the most widely used method of diagnosis for amebic liver abscess. (medscape.com)
  • Several high-performance commercial tests have been described, but these require centralised laboratory facilities that are comparatively expensive, and therefore not available universally. (ox.ac.uk)
  • In particular, diagnosis of eperythrozoonosis is complicated by lack of readily identifiable parasitemia in latent and chronic infections, rapid loss of parasitemia at the time of onset of clinical signs in acutely ill pigs and the lack of sensitive and specific laboratory tests for the organism. (google.com)
  • The chart below represents titer values for over 900 sera tested for H3N8 since 2013. (cornell.edu)
  • This virus sample has an HAI titer of 1280, which means that the greatest dilution of antibody that still blocked hemagglutination from occurring was at 1280 dilution. (microbeonline.com)
  • Searo-Diagnosis of Dengue Infections by Haemagglutination Inhibition Test (‎HI)‎ in Suspected Cases in Chittagong, Bangladesh. (who.int)
  • In the diagnosis of current gonorrhoea the sensitivity of the gonococcal antibody test was far superior to that of the gonococcal complement fixation test (about 55% versus 9% for first episode gonorrhoea). (bmj.com)
  • HA of chicken erythrocytes (CRBC) and haemagglutination inhibition (HI) using specific antiserum is an accepted test for diagnosis of Newcastle disease (ND), since the test is sensitive, easy to perform and cost effective. (egranth.ac.in)
  • The present study was undertaken to increase the shelf life of CRBC by fixation using aldehydes for successful use of CRBC in HA and HI test in diagnosis of ND. (egranth.ac.in)
  • Significance of haemagglutination test in the diagnosis of amebiasis. (bvsalud.org)
  • IMSEAR at SEARO: Comparative evaluation of indirect haemagglutination and complement fixation tests in serodiagnosis of cysticercosis. (who.int)
  • The sensitivity and specificity values were 79.3 and 99.5% and 82.8 and 93.2% for the modified complement fixation and haemagglutination tests, respectively. (qld.gov.au)
  • However, hemagglutination inhibition, complement fixation, and neutralization tests identified Powassan virus (POW) as the pathogen. (nih.gov)
  • Hemagglutination occurs when measles viruses and red blood cells are mixed (See image a) . (microbeonline.com)
  • A/decoyduck/France/161105a/2016 and H5N5 A/muteswan/ Croatia/102/2016, or for viruses belonging to other H5 Eurasian lineages, H5N3 A/muscovy duck/France/070090b/2007 and H5N2 A/chicken/France/03426a/2003 (http://www.oie.int/en/standard-setting/terrestrial- code/access-online). (cdc.gov)
  • IMSEAR at SEARO: ECHO virus haemagglutination inhibition test for epidemiological survey in India: its utility and validity. (who.int)
  • A hemagglutination-inhibition (HI) test for rubella is described which utilizes human group O, rather than 1-day-old chick, erythrocytes. (asm.org)
  • The test was found to be as sensitive and reproducible for detection of rubella antibody as HI tests employing chick erythrocytes. (asm.org)
  • Advantages to the use of human erythrocytes are (i) they are more available, (ii) it is unnecessary to absorb natural agglutinins from human test sera, and (iii) heparin-MnCl 2 -treated sera do not agglutinate human erythrocytes, as is sometimes the case with chick erythrocytes. (asm.org)
  • The HAI test may be complicated by the presence of non-specific inhibitors of viral haemagglutination and naturally occurring agglutinins of the erythrocytes. (microbeonline.com)
  • Haemagglutination (HA) of Newcastle disease virus (NDV) was first described by Burnet (1942) who found that this action to be inhibited by specific antiserum. (egranth.ac.in)
  • The World Health Organization (WHO) has recommended criteria based on the hemagglutination inhibition (HI) test to distinguish between primary and secondary dengue infections. (hindawi.com)
  • Since the condition is managed with supportive care rather than cured, it is not always necessary to run diagnostic tests. (wikihow.com)
  • The Thrombo Plus® test for direct platelet counting and the Hemoplus® test for the detection of occult blood in faeces form the basis for the expansion of our diagnostic activities. (sarstedt.com)
  • In microbiology and immunology, the hemagglutination reaction is used to determine antiserum activity, for example, or type of virus. (thefreedictionary.com)
  • With the IHA test, 14 of the 15 reference strains were correctly serotyped - with serovar 10 failing to give a titre with serovar 10 antiserum. (qld.gov.au)
  • Parallel testing of 895 sera by indirect hemagglutination and indirect fluorescent-antibody techniques showed 97.3% agreement. (asm.org)
  • These figures were confirmed by randomised FTA-ABS tests on 504 sera with repeat AMHA-TP tests. (bmj.com)
  • These tests were carried out on sera from goats, sheep and cattle, naturally infected with hydatid disease. (ac.ke)
  • Reactive results were checked by the fluorescent treponemal antibody-absorption (FTA-ABS) test. (bmj.com)
  • All 15 serovar reference strains, 72 Australian field isolates, nine Chinese field isolates, and seven isolates from seven experimentally infected pigs were evaluated with both tests. (qld.gov.au)
  • The cross-neutralization tests confirmed that the strains harboring 347 K showed lower antigenic relatedness with LaSota. (biomedcentral.com)
  • The sensitivity of this radioimmunoassay exceeds that of the tanned-erythrocyte hemagglutination test. (biomedsearch.com)
  • The PCR stool test shows high sensitivity for detecting E histolytica and for distinguishing nonpathogenic amoebas. (medscape.com)
  • The indirect hemagglutination techniques showed no cross-reactivity with a crude extract of Escherichia coli O13:K92:H4. (asm.org)
  • Samples that are submitted for PCR detection of the virus that are test positive will be automatically set for Virus Isolation at no additional cost. (cornell.edu)
  • We have scaled up production of this reagent to one gram, which is sufficient for ten million tests, at a cost of ~0.27 UK pence per test well. (ox.ac.uk)
  • We will supply aliquots of the test reagent sufficient for ten thousand test wells free of charge to qualified research groups anywhere in the world. (ed.ac.uk)
  • To evaluate the usefulness of the test result the following population groups were studied: 1376 patients undergoing medical examination for gonorrhoea (386 had gonorrhoea), 1384 healthy people aged 15-65, 54 patients with meningococcal disease, 30 children with respiratory tract infection, and 254 patients with evidence of various diseases other than neisserial infections that might be associated with symptoms of arthritis. (bmj.com)
  • A simplified hemagglutination test for farmer's lung. (cdc.gov)
  • Results are cited as comparing favorably in diagnosing farmer's lung with the agar gel diffusion test, which is considered much less simple. (cdc.gov)
  • Furthermore, Ag typing is more complicated when the recipient's RBCs have a positive direct antiglobulin test. (scirp.org)
  • A generic PCR test that detects the highly conserved matrix gene is the test of choice. (cornell.edu)
  • On the contrary, if hemagglutination occurs, the test will result negative. (wikipedia.org)
  • To differentiate TBEV infection from Japanese encephalitis virus (JEV) infection, which occurs in southwestern Japan, we also conducted neutralization testing for JEV on all TBEV-positive samples. (cdc.gov)
  • Only two out of 15 samples and La Sota vaccine strain could be confirmed to contain NDV on the basis of HA and HI tests. (ijcmas.com)
  • The USGS National Wildlife Health Center (NWHC), in conjunction with others, has developed and tested a sylvatic plague vaccine (SPV), deliverable to prairie dogs via palatable bait that offers an additional approach for plague management. (usgs.gov)
  • The modified hemagglutination test showed 100% specificity and an overall agreement of 96.5% with the hemagglutination test for T. pallidum and 94.8% with the fluorescent treponemal antibody test. (mysciencework.com)
  • The modified hemagglutination test appears to be a simple and economical test that is suitable for use in large epidemiological surveys for yaws. (mysciencework.com)
  • Evaluation of an indirect hemagglutination test for Legionella pneumophila serogroups 1 to 4. (asm.org)
  • Hemagglutination is caused by the interaction of the agglutinogens present in red blood cells with plasma that contains agglutinins. (thefreedictionary.com)
  • These investigations showed that (1) non-specific positive gonococcal antibody test results occur rarely, (2) at least half the people who have had gonorrhoea remain seropositive (with titres of 1/40 to 1/160), and (3) a positive test result is more significant the younger the patient and the higher the titre. (bmj.com)
  • this has been confirmed by measles haemagglutination-inhibiting antibody estimations in a sample of the children. (nih.gov)