• Comparison of enzyme-linked immunosorbent assay and haemagglutination inhibition test for the detection of Newcastle disease virus antibodies in human sera. (bmj.com)
  • A comparison of haemagglutination inhibition (HI) and enzyme-linked immunosorbent assay (ELISA) techniques for the detection of antibodies against Newcastle disease virus in sera from persons working in poultry farms and veterinary vaccine institutes and from the general population revealed that 22% more sera were positive by ELISA compared to HI. (bmj.com)
  • Active agglutination tests are a sort of diagnostic test used to find out whether a patient's blood serum or other body fluids have particular antibodies. (serologytest.com)
  • Approximately 7% of the sera tested to determine the presence of rubella-specific antibodies by the hemagglutination inhibition test demonstrated abnormal patterns of reactivity, rendering the test unreadable. (elsevierpure.com)
  • Haemagglutination inhibiting (HI) antibodies were tested by a standard WHO procedure. (bmj.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)
  • The HI test works by measuring how well antibodies bind to the HA proteins and prevent them from "gluing" red blood cells together (i.e., hemagglutination inhibition). (cdc.gov)
  • HI test results can tell us whether antibodies developed after vaccination (or infection) with one virus can recognize and bind to other viruses, which means these other viruses are similar to the vaccine virus. (cdc.gov)
  • Scientists also use the HI test to compare the antigenic properties (i.e., the virus' ability to be recognized by antibodies) of currently circulating influenza viruses with those of influenza viruses that have circulated in the past. (cdc.gov)
  • The HI test involves three main components: antibodies, influenza virus, and red blood cells that are mixed together in the wells (i.e., cups) of a microtiter plate. (cdc.gov)
  • The rows of the plate can be used to test different influenza viruses against the same set of antibodies. (cdc.gov)
  • These pairs of H5 antigens, with different neuraminidase subtypes, were tested to exclude cross-reactivity driven by neuraminidase-specific antibodies. (cdc.gov)
  • 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. (liverpool.ac.uk)
  • For each country, a nationally representative population sample was collected across the entire age range and was tested for antibodies to diphtheria toxin. (cambridge.org)
  • Syphilis tests screen for and diagnose syphilis by looking for certain antibodies in your blood. (medlineplus.gov)
  • In most cases, the first step is a screening test to check for antibodies that are linked to having a syphilis infection. (medlineplus.gov)
  • If the result of your screening test shows you have antibodies linked to syphilis infections, you'll need a second test to confirm whether or not you have syphilis. (medlineplus.gov)
  • Usually, the second test looks for antibodies that your immune system makes only to fight off syphilis. (medlineplus.gov)
  • In some cases, a health care provider will use a test that looks for actual syphilis bacteria, instead of antibodies. (medlineplus.gov)
  • Testing for antibodies specific for influenza virus is generally done using the standard influenza virus test of hemagglutination inhibition (HI). (cornell.edu)
  • Samples from dogs with respiratory disease will be tested for both H3N8 and H3N2-specific antibodies. (cornell.edu)
  • Using a cross-sectional study design, sera was collected from volunteers and then tested for the presence of antibodies to the virus using a ≥ 1:40 dilution cut-off by hemagglutination inhibition assay. (biomedcentral.com)
  • Immune adherence hemagglutination was compared with the complement fixation test as a means of measuring antibodies to varicella-zoster virus. (mcmaster.ca)
  • There were 35 cases where antibodies were detected by immune adherence hemagglutination but not by complement fixation, whereas in five cases the converse was found. (mcmaster.ca)
  • Our findings support the contention that immune adherence hemagglutination is the method of choice for detecting antibodies to varicella-zoster virus. (mcmaster.ca)
  • RBC from donors of selected phenotypes were tested by hemagglutination using two monoclonal antibodies to CR1, as well as anti-Kn^a, -McC^a, -S1^a, -'Kn/McC' and -Yk^a. (karger.com)
  • Mumps would also cause a 4-fold rise in antibodies detected by complement fixation or indirect haemagglutination or neutralisation tests on acute and convalescent sera. (healthengine.com.au)
  • Sera were tested in ELISA assays for influenza A type specific antibodies and by haemagglutination inhibition (HI) tests using equine H3N8. (flu.org.cn)
  • Scientists use a test called the hemagglutination inhibition assay (HI test) to antigenically characterize influenza viruses. (cdc.gov)
  • 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)
  • Although each national laboratory used its preferred assay, the results were all standardized to those of the in vitro neutralization test and expressed in international units (IU) which allowed comparative analyses to be performed. (cambridge.org)
  • 158 (52.6%) tested positive for influenza A(H1N1) 2009 via hemagglutination inhibition assay using a ≥ 1:40 dilution cut-off. (biomedcentral.com)
  • 54.4% of those who tested positive for influenza A(H1N1) 2009 using the ≥ 1:40 dilution cut-off on the hemagglutination inhibition assay in this study population did not report experiencing symptoms during the pandemic meeting the May 2010 CDC definition of influenza-like illness. (biomedcentral.com)
  • The swabs were tested by RT-qPCR assay targeting a conserved region of the influenza A matrix gene that detects influenza A viruses of all subtypes. (flu.org.cn)
  • Serum samples were screened for syphilis using rapid plasma regain (RPR) test and those found seropositive were further confirmed by Treponema pallidum haemagglutination assay (TPHA) test following the manufacturer's instruction. (biomedcentral.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. (liverpool.ac.uk)
  • In our study, we aimed to make inferences about the effects of the pandemic on the diagnosis of the disease by evaluating the number and results of CE indirect hemagglutination test (IHA) before and during the pandemic. (nevinmanimala.com)
  • Casoni's skin test and indirect haemagglutination test (IHA) are still used in Turkey. (bezmialem.edu.tr)
  • Genetic sequencing and Serology tests using human sera and genetic sequencing provide additional information about how similar circulating flu viruses are to vaccine viruses or other influenza viruses. (cdc.gov)
  • Scientists use the HI test to assess the antigenic similarity between different influenza viruses. (cdc.gov)
  • Point-of-care influenza testing impacts clinical decision, patient flow and length of stay in hospitalized adults. (europa.eu)
  • In addition to the Influenza Virus Matrix PCR test that will detect any influenza variant currently circulating that may infect dogs or other species, the AHDC offers a more broadly diagnostic Canine Respiratory PCR Panel. (cornell.edu)
  • 86 people (54.4%) tested positive for H1N1 but did not report experiencing symptoms during the pandemic meeting the May 2010 CDC definition of influenza-like illness. (biomedcentral.com)
  • Overall, 52.7% of the total study population tested positive for influenza A(H1N1) 2009. (biomedcentral.com)
  • Within weeks of the beginning of the epidemic, public health laboratories quickly became overwhelmed with unprecedented numbers of clinical influenza specimens for testing, and the Centers for Disease Control and Prevention (CDC) quickly recommended changes in the testing strategy [ 3 ]. (biomedcentral.com)
  • The CDC recommended that since uncomplicated influenza did not require a laboratory diagnosis for clinical management, the only people who required testing for influenza were: hospitalized patients with suspected influenza, patients for whom a diagnosis of influenza would have informed decisions regarding clinical care, infection control, or management of close contacts, and patients who died of an acute illness in which influenza was suspected. (biomedcentral.com)
  • According to the CDC, diagnosis of other groups was not considered a priority for a number of reasons, the foremost of which being "Once influenza activity has been documented in a community or geographic area, most patients with an uncomplicated illness consistent with influenza can be diagnosed clinically and do not require influenza testing for clinical management, including antiviral treatment decisions [ 4 ]. (biomedcentral.com)
  • Casoni's skin test components had higher sensitivity than IHA (P (bezmialem.edu.tr)
  • Analysis of acute- and convalescent-phase sera from patients infected with varicella-zoster or with herpes simplex virus showed the immune adherence hemagglutination test to be more sensitive than the complement fixation test, and greater cross-reactivity between the two viruses appeared to be associated with the increased sensitivity. (mcmaster.ca)
  • 7 days should be tested for CIV by an antibody test as the virus itself is often undetectable in later stages of illness, as is true for most respiratory viral infections. (cornell.edu)
  • 12 months of age) with one of the following: 1) a reactive nontreponemal serologic test for syphilis confirmed by a reactive treponemal test, 2) a positive darkfield microscopic examination on a non- oral mucous membrane, or 3) a positive fluorescent antibody examination for Treponema pallidum on any lesion. (cdc.gov)
  • This test helps to select candidate vaccine viruses (CVVs), which can then be included in seasonal flu vaccines. (cdc.gov)
  • 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)
  • They inhibit competitively the hemagglutination of all viruses of group B so far tested and of Semliki Forest virus of group A. Infectivity of West Nile virus is also inhibited. (dtic.mil)
  • However, these tests showed low specificity and the sensibility depends on the test that had been chosen (1). (scielo.br)
  • At a minimum, hospitals in areas with a high incidence of syphilis or that serve patient populations known to be at increased risk for syphilis should perform routine serologic tests for syphilis (STS) using blood samples from the umbilical cord. (cdc.gov)
  • Serologic tests are useful for monitoring the MG infection in a flock and for prophylactic measures to control MG infection early detected in MG free poultry. (scielo.br)
  • Serologic tests in which a known quantity of antigen is added to the serum prior to the addition of a red cell suspension. (bvsalud.org)
  • What are syphilis tests? (medlineplus.gov)
  • Syphilis tests are used to screen for and diagnose syphilis . (medlineplus.gov)
  • Syphilis tests can help diagnose the infection in the early stages, when it's easiest to cure. (medlineplus.gov)
  • Syphilis testing usually involves two steps. (medlineplus.gov)
  • Why do I need a syphilis test? (medlineplus.gov)
  • You should get tested for syphilis if you have symptoms of syphilis or if your sexual partner was recently diagnosed with syphilis. (medlineplus.gov)
  • Even if you don't have symptoms, you should get tested regularly if you have a high risk for getting syphilis. (medlineplus.gov)
  • You will also need a syphilis test if you are pregnant . (medlineplus.gov)
  • The Centers for Disease Control and Prevention recommends that all pregnant people have a syphilis test at their first prenatal visit. (medlineplus.gov)
  • Pregnant people who are more likely to become infected with syphilis should be tested again at 28 weeks of pregnancy and at delivery. (medlineplus.gov)
  • Like integration of syphilis testing and treatment to the already established HIV prevention program and creating awareness about early ANC visit and follow-up. (biomedcentral.com)
  • In Ethiopia, pregnant women are tested only once for syphilis during ANC visits using rapid plasma reagin (RPR) test and those women reactive for RPR were treated immediately with one or more dose of intramuscular benzathine penicillin G 2.4 million units [ 16 ]. (biomedcentral.com)
  • The status of no increase in positivity rates despite a significant decrease in IHA tests makes us think that the diagnosis may be missed in some patients or that there could be disruptions in their follow-up. (nevinmanimala.com)
  • For this reason, in order to continue the fight successfully against CE, which is an important public health problem for our country, early diagnosis and regular follow-ups should be emphasized with educations, and the laboratory-clinician communication should be strengthened in order to use tests more efficiently. (nevinmanimala.com)
  • T-cell gene rearrangement studies to test for clonality may aid in the diagnosis of a lymphoma. (medscape.com)
  • The diagnosis of PE is based primarily on validated clinical criteria combined with selective testing because the typical clinical presentation ( shortness of breath , chest pain ) cannot be definitively differentiated from other causes of chest pain and shortness of breath. (citizendium.org)
  • This test is used to confirm suspected immune-mediated haemolytic anaemia (IHMA). (bsavalibrary.com)
  • It was interesting that though 78% sera had concordant results by the two tests, titres obtained by ELISA were nearly six times higher than those by HI. (bmj.com)
  • These results emphasize the necessity of heating sera for the rubella hemagglutination inhibition test after the chemical removal of nonspecific inhibitors. (elsevierpure.com)
  • The preoperative IHA test or Casoni's skin test results of 120 patients with surgically confirmed hydatidosis were retrospectively studied during 1997-2004. (bezmialem.edu.tr)
  • 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. (liverpool.ac.uk)
  • 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)
  • Of the 145 serasamples tested by ELISA, 81 (55.9%) were positive and 98 (67.6%) of 145 sera tested by HI tests were positive for equine H3. (flu.org.cn)
  • When these abnormally reacting and false-positive sera were heated at 56°C for 30 min after chemical treatment they always converted to negative, indicating the absence of specific rubella hemagglutination-inhibiting antibody. (elsevierpure.com)
  • 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)
  • 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)
  • Physicians should maintain awareness of Y. pseudotuberculosis as a potential cause of gastroenteritis and pseudoappendicitis and know which diagnostic tests to order. (medscape.com)
  • Additionally, ZH283 efficiently replicated in all tested tissues and transmitted among chickens more rapidly than SW8. (frontiersin.org)
  • Most human infections are benign: in agglutination test. (who.int)
  • Effects of AK117 on hemagglutination of human RBC at was tested. (bmj.com)
  • A significant weaker binding to human RBC of AK117 was identified (figure 4), and AK117 does not induce hemagglutination of human RBC up to a concentration of 1050 μg/mL, while Hu-5F9 triggers hemagglutination even at a low concentration of 1.44 μg/mL (figure 5). (bmj.com)
  • Hemagglutination effect on human erythrocytes. (bmj.com)
  • RÉSUMÉ Afin d'identifier la contribution réelle de la toxoplasmose à la perte foetale et aux mauvais antécé- dents obstétricaux, nous avons effectué des tests chez 310 femmes, dont 77,4 % avaient eu une ou plusieurs perte(s) foetale(s), à la recherche de preuves d'une infection. (who.int)
  • 0.97%) tested positive. (who.int)
  • 55 tested positive. (who.int)
  • Furthermore, of those individuals who reported that they had received the H1N1 vaccine, 16% did not test positive. (biomedcentral.com)
  • 16% of those who reported receiving the H1N1 vaccine did not test positive by HAI. (biomedcentral.com)
  • Before the study population was screened, the commercial system was compared to the traditional hemagglutination-inhibition (HAI) test using 500 consecutive samples from parturient women. (nih.gov)