EPIDEMIOLOGIC STUDIES based on the detection through serological testing of characteristic change in the serum level of specific ANTIBODIES. Latent subclinical infections and carrier states can thus be detected in addition to clinically overt cases.
Immunoglobulins produced in response to VIRAL ANTIGENS.
Immunoglobulins produced in a response to BACTERIAL ANTIGENS.
Infection of animals, including fish and man, with a developmental stage of Diphyllobothrium. This stage has recently been referred to as a plerocercoid but the name sparganum has persisted. Therefore, infection of fish or other animals with the plerocercoid larvae is sparganosis. Fish-eating mammals, including man, are the final hosts.
An immunoassay utilizing an antibody labeled with an enzyme marker such as horseradish peroxidase. While either the enzyme or the antibody is bound to an immunosorbent substrate, they both retain their biologic activity; the change in enzyme activity as a result of the enzyme-antibody-antigen reaction is proportional to the concentration of the antigen and can be measured spectrophotometrically or with the naked eye. Many variations of the method have been developed.
A species of CHLAMYDOPHILA that causes acute respiratory infection, especially atypical pneumonia, in humans, horses, and koalas.
The total number of cases of a given disease in a specified population at a designated time. It is differentiated from INCIDENCE, which refers to the number of new cases in the population at a given time.
The major immunoglobulin isotype class in normal human serum. There are several isotype subclasses of IgG, for example, IgG1, IgG2A, and IgG2B.

A multistate, foodborne outbreak of hepatitis A. National Hepatitis A Investigation Team. (1/3477)

BACKGROUND: We investigated a large, foodborne outbreak of hepatitis A that occurred in February and March 1997 in Michigan and then extended the investigation to determine whether it was related to sporadic cases reported in other states among persons who had consumed frozen strawberries, the food suspected of causing the outbreak. METHODS: The cases of hepatitis A were serologically confirmed. Epidemiologic studies were conducted in the two states with sufficient numbers of cases, Michigan and Maine. Hepatitis A virus RNA detected in clinical specimens was sequenced to determine the relatedness of the virus from outbreak-related cases and other cases. RESULTS: A total of 213 cases of hepatitis A were reported from 23 schools in Michigan and 29 cases from 13 schools in Maine, with the median rate of attack ranging from 0.2 to 14 percent. Hepatitis A was associated with the consumption of frozen strawberries in a case-control study (odds ratio for the disease, 8.3; 95 percent confidence interval, 2.1 to 33) and a cohort study (relative risk of infection, 7.5; 95 percent confidence interval, 1.1 to 53) in Michigan and in a case-control study in Maine (odds ratio for infection, 3.4; 95 percent confidence interval, 1.0 to 14). The genetic sequences of viruses from 126 patients in Michigan and Maine were identical to one another and to those from 5 patients in Wisconsin and 7 patients in Arizona, all of whom attended schools where frozen strawberries from the same processor had been served, and to those in 2 patients from Louisiana, both of whom had consumed commercially prepared products containing frozen strawberries from the same processor. CONCLUSIONS: We describe a large outbreak of hepatitis A in Michigan that was associated with the consumption of frozen strawberries. We found apparently sporadic cases in other states that could be linked to the same source by viral genetic analysis.  (+info)

Immunosurveillance and the evaluation of national immunization programmes: a population-based approach. (2/3477)

Mass vaccination can change the epidemiological dynamics of infectious diseases. It may result in a limited persistence of natural and vaccine-induced immunity and a higher mean age of infection, which may lead to a greater risk of complications. The epidemiological situation should be monitored and immunosurveillance based on the assessment of specific antibodies against vaccine-preventable diseases in human serum is one of the tools. In order to estimate the immunity of the Dutch population reliably, a large-scale, population-based, collection of serum samples was established (8359 sera in a nation-wide sampling and 1589 sera from municipalities with low vaccine coverage). In contrast to collecting residual sera from laboratories, this approach gains extensive information by means of a questionnaire regarding the determinants of the immune status and the risk factors for the transmission of infectious diseases in general. The population-based approach gives a better guarantee that the data are representative than collecting sera from laboratories does.  (+info)

Seroepidemiological evaluation of 1989-91 mass vaccination campaigns against measles, in Italy. (3/3477)

In 1989-91 anti-measles vaccination campaigns were conducted in several Italian regions to vaccinate all children aged between 13 months and 10-12 years without a history of measles or measles vaccination. This study was conducted to evaluate serological status after the mass vaccination campaigns. In 1994, capillary blood samples were collected from randomly selected children, aged 2-14 years, living in 13 local health units. Antibody titres were determined by ELISA. Blood spot samples were analysed for 4114 (75.6%) of 5440 selected children. Among the 835 that reported measles before 1990, 806 (96.5%) were immune and of the 2798 vaccinated, 2665 (95.2%) were immune. The Edmoston-Zagreb (E-Z) strain vaccine was associated with a lower level of immunity than the Schwarz (SW) strain. A history of measles identified almost all immune children. Vaccination with the SW strain conferred persistent immunity (at least 5 years) in 98% of vaccinees. The strategy was able to unite natural and induced immunity.  (+info)

Prospective study of Chlamydia pneumoniae IgG seropositivity and risks of future myocardial infarction. (4/3477)

BACKGROUND: Chlamydia pneumoniae has been hypothesized to play a role in atherothrombosis. However, prospective data relating exposure to Chlamydia pneumoniae and risks of future myocardial infarction (MI) are sparse. METHODS AND RESULTS: In a prospective cohort of nearly 15 000 healthy men, we measured IgG antibodies directed against Chlamydia pneumoniae in blood samples collected at baseline from 343 study participants who subsequently reported a first MI and from an equal number of age- and smoking-matched control subjects who did not report vascular disease during a 12-year follow-up period. The proportion of study subjects with IgG antibodies directed against Chlamydia increased with age and cigarette consumption. However, prevalence rates of Chlamydia IgG seropositivity were virtually identical at baseline among men who subsequently reported first MI compared with age- and smoking-matched control subjects. Specifically, the relative risks of future MI associated with Chlamydia pneumoniae IgG titers >/=1:16, 1:32, 1:64, 1:128, and 1:256 were 1.1, 1.0, 1.1, 1.0, and 0.8, respectively (all probability values not significant). There was no association in analyses adjusted for other risk factors, evaluating early as compared with late events, or among nonsmokers. Further, there was no association between seropositivity and concentration of C-reactive protein, a marker of inflammation that predicts MI risk in this cohort. CONCLUSIONS: In a large-scale study of socioeconomically homogeneous men that controlled for age, smoking, and other cardiovascular risk factors, we found no evidence of association between Chlamydia pneumoniae IgG seropositivity and risks of future MI.  (+info)

High seroprevalence of antibodies to human herpesvirus-8 in Egyptian children: evidence of nonsexual transmission. (5/3477)

BACKGROUND: In western countries, human herpesvirus-8 (HHV-8) appears to be transmitted mainly by sexual contact. To evaluate the role of other transmission routes, especially in developing countries, we estimated the seroprevalence of HHV-8 in Egyptian children, who, if seropositive, would have acquired the virus through a nonsexual route. METHODS: Sera from 196 children (<1-12 years of age), 20 adolescents (13-20 years of age), and 30 young adults (21-25 years of age) attending a vaccination program in Alexandria, Egypt, were studied. Immunofluorescence assays were used to detect antibodies against HHV-8 lytic-phase antigens (anti-lytic) and latent-phase antigens (anti-latent). Antibodies against Epstein-Barr virus viral cap antigen, cytomegalovirus, and HHV-6 were detected by enzyme-linked immunosorbent assays. Seroprevalence of these herpesviruses was calculated after stratifying the subjects by age. RESULTS: Anti-lytic and anti-latent HHV-8 antibodies were detected in 44.7% and 8.5% of the study participants, respectively. The prevalence of anti-lytic antibodies tended to increase with age, exceeding 50% in children older than 6 years; once children reached the age of 10 years, the prevalence tended to stabilize. The seroprevalence of other herpesviruses tended to be higher than that of HHV-8, ranging from approximately 83% to more than 97% in the 9- to 12-year age group. One- to 3-year-old children had higher titers of antilytic HHV-8 antibodies than children in the other age groups. Anti-latent antibodies were more frequently detected in individuals with high anti-lytic antibody titers. CONCLUSIONS: HHV-8 antibodies are highly prevalent in Egyptian children, suggesting that, in developing countries, HHV-8 infection may be acquired early in life through routes other than sexual transmission. The lower seroprevalence of HHV-8 relative to that of the other herpesviruses suggests that HHV-8 is less transmissible than other common herpesviruses.  (+info)

Risk of Helicobacter pylori infection among long-term residents in developing countries. (6/3477)

The seroprevalence and incidence of Helicobacter pylori infection were determined among 312 North American missionaries who were serving in developing countries between 1967 and 1984. The majority (81%) resided in sub-Saharan Africa. When initially evaluated, the missionaries had a mean age of 40 years, 65% were female, and all were of white race/ethnicity. An ELISA showed that the initial prevalence of IgG antibody to H. pylori was 17%. After a mean of 7.4 years of service (1917 person-years of exposure), 37 (14%) of 259 initially seronegative subjects seroconverted to anti-H. pylori, giving an annual incidence of 1.9%. These data indicate a relatively higher risk of H. pylori infection among missionaries compared with an annual incidence of seroconversion of 0.3-1.0% in industrialized nations. Long-term residents in developing countries should be evaluated for H. pylori infection when gastrointestinal symptoms develop.  (+info)

Age-specific decrease in seroprevalence of schistosomiasis in Puerto Rico. (7/3477)

In our previous work, we reported the first systematic, island-wide, serologic survey for schistosomiasis in Puerto Rico in 40 years. In that study, approximately 3,000 serum samples from the 76 municipalities comprising the island of Puerto Rico were tested for the detection of antibodies to S. mansoni microsomal antigens by the Falcon assay screening test-enzyme-linked immunosorbent assay (FAST-ELISA) and those positive were confirmed by an enzyme-linked immunoelectrotransfer blot (EITB). The highest EITB positivity was found in 17 municipalities, which comprised 48% of all seropositive samples. An additional finding was that 10% of the 215 EITB-positive samples were from individuals 25 years or younger and were for the most part of residents from the high seroprevalence areas. Thus, for this study we focused on 766 individuals 25 years of age or younger (45.5% males and 54.4% females), two-thirds of which were from 10 municipalities with the highest EITB seropositivity, and one-third from the 10 municipalities with the lowest EITB seropositivity found in our previous study. Of all samples, the results showed an overall FAST-ELISA positivity of 11.6%, with males similar to females (12.6 versus 10.7%, respectively). Confirmation by EITB was only 1.8%, with a males three-fold higher than females (3% versus 0.7%). When seropositivity was measured by age in five-year increments, a clear age-specific decrease in seropositivity was observed. Thus, by FAST-ELISA, 16.7% of the 21-25-year-old age group was positive, decreasing to 14.6%, 9.9%, 7.9%, and 9.3% in the 16-20-, 11-15-, 6-10-, and 1-5-year-old age groups, respectively. Confirmatory EITB showed even more impressive results: 4.7%, 2.6%, 1.2%, 0.7%, and 0% in the same age brackets. With regard to the high prevalence municipalities, only four of 10 (11 of 228 = 4.8%) had confirmatory EITB-positive samples and most were from municipalities of the Rio Grande de Loiza River basin and tributaries. The male to female positivity ratio was 4:1. Of the low prevalence municipalities, only single positive cases (by EITB) were found in three disperse municipalities. These results support the concept that there has been little transmission of S. mansoni in Puerto Rico during the first half of the 1990s and confirms anecdotal comments of local physicians who have seen virtually no new infections during the past three years. This makes the documentation of eradication of schistosomiasis from Puerto Rico feasible, a goal that should be set as being before the 100th anniversary of its discovery on the island by Isaac Gonzalez-Martinez in 1904.  (+info)

Detection of antibody to avian influenza A (H5N1) virus in human serum by using a combination of serologic assays. (8/3477)

From May to December 1997, 18 cases of mild to severe respiratory illness caused by avian influenza A (H5N1) viruses were identified in Hong Kong. The emergence of an avian virus in the human population prompted an epidemiological investigation to determine the extent of human-to-human transmission of the virus and risk factors associated with infection. The hemagglutination inhibition (HI) assay, the standard method for serologic detection of influenza virus infection in humans, has been shown to be less sensitive for the detection of antibodies induced by avian influenza viruses. Therefore, we developed a more sensitive microneutralization assay to detect antibodies to avian influenza in humans. Direct comparison of an HI assay and the microneutralization assay demonstrated that the latter was substantially more sensitive in detecting human antibodies to H5N1 virus in infected individuals. An H5-specific indirect enzyme-linked immunosorbent assay (ELISA) was also established to test children's sera. The sensitivity and specificity of the microneutralization assay were compared with those of an H5-specific indirect ELISA. When combined with a confirmatory H5-specific Western blot test, the specificities of both assays were improved. Maximum sensitivity (80%) and specificity (96%) for the detection of anti-H5 antibody in adults aged 18 to 59 years were achieved by using the microneutralization assay combined with Western blotting. Maximum sensitivity (100%) and specificity (100%) in detecting anti-H5 antibody in sera obtained from children less than 15 years of age were achieved by using ELISA combined with Western blotting. This new test algorithm is being used for the seroepidemiologic investigations of the avian H5N1 influenza outbreak.  (+info)

Seroepidemiologic studies are a type of epidemiological study that measures the presence and levels of antibodies in a population's blood serum to investigate the prevalence, distribution, and transmission of infectious diseases. These studies help to identify patterns of infection and immunity within a population, which can inform public health policies and interventions.

Seroepidemiologic studies typically involve collecting blood samples from a representative sample of individuals in a population and testing them for the presence of antibodies against specific pathogens. The results are then analyzed to estimate the prevalence of infection and immunity within the population, as well as any factors associated with increased or decreased risk of infection.

These studies can provide valuable insights into the spread of infectious diseases, including emerging and re-emerging infections, and help to monitor the effectiveness of vaccination programs. Additionally, seroepidemiologic studies can also be used to investigate the transmission dynamics of infectious agents, such as identifying sources of infection or tracking the spread of antibiotic resistance.

Antibodies, viral are proteins produced by the immune system in response to an infection with a virus. These antibodies are capable of recognizing and binding to specific antigens on the surface of the virus, which helps to neutralize or destroy the virus and prevent its replication. Once produced, these antibodies can provide immunity against future infections with the same virus.

Viral antibodies are typically composed of four polypeptide chains - two heavy chains and two light chains - that are held together by disulfide bonds. The binding site for the antigen is located at the tip of the Y-shaped structure, formed by the variable regions of the heavy and light chains.

There are five classes of antibodies in humans: IgA, IgD, IgE, IgG, and IgM. Each class has a different function and is distributed differently throughout the body. For example, IgG is the most common type of antibody found in the bloodstream and provides long-term immunity against viruses, while IgA is found primarily in mucous membranes and helps to protect against respiratory and gastrointestinal infections.

In addition to their role in the immune response, viral antibodies can also be used as diagnostic tools to detect the presence of a specific virus in a patient's blood or other bodily fluids.

Bacterial antibodies are a type of antibodies produced by the immune system in response to an infection caused by bacteria. These antibodies are proteins that recognize and bind to specific antigens on the surface of the bacterial cells, marking them for destruction by other immune cells. Bacterial antibodies can be classified into several types based on their structure and function, including IgG, IgM, IgA, and IgE. They play a crucial role in the body's defense against bacterial infections and provide immunity to future infections with the same bacteria.

Sparganosis is a parasitic infection caused by the larval stage (spargana) of certain tapeworms in the genus Spirometra. It is typically acquired through the consumption of undercooked or contaminated food or water, or through direct contact with contaminated soil or water. The larvae can migrate to various tissues and organs in the body, including the subcutaneous tissue, eyes, brain, and muscles, causing inflammation and damage. Symptoms of sparganosis depend on the location and extent of the infection and may include swelling, pain, and fever. Treatment typically involves surgical removal of the parasite and anti-parasitic medication.

An Enzyme-Linked Immunosorbent Assay (ELISA) is a type of analytical biochemistry assay used to detect and quantify the presence of a substance, typically a protein or peptide, in a liquid sample. It takes its name from the enzyme-linked antibodies used in the assay.

In an ELISA, the sample is added to a well containing a surface that has been treated to capture the target substance. If the target substance is present in the sample, it will bind to the surface. Next, an enzyme-linked antibody specific to the target substance is added. This antibody will bind to the captured target substance if it is present. After washing away any unbound material, a substrate for the enzyme is added. If the enzyme is present due to its linkage to the antibody, it will catalyze a reaction that produces a detectable signal, such as a color change or fluorescence. The intensity of this signal is proportional to the amount of target substance present in the sample, allowing for quantification.

ELISAs are widely used in research and clinical settings to detect and measure various substances, including hormones, viruses, and bacteria. They offer high sensitivity, specificity, and reproducibility, making them a reliable choice for many applications.

'Chlamydophila pneumoniae' is a type of bacteria that can cause respiratory infections in humans. It is the causative agent of a form of pneumonia known as "atypical pneumonia," which is characterized by milder symptoms and a slower onset than other types of pneumonia.

The bacteria are transmitted through respiratory droplets, such as those produced when an infected person coughs or sneezes. 'Chlamydophila pneumoniae' infections can occur throughout the year, but they are more common in the fall and winter months.

Symptoms of a 'Chlamydophila pneumoniae' infection may include cough, chest pain, fever, fatigue, and difficulty breathing. The infection can also cause other respiratory symptoms, such as sore throat, headache, and muscle aches. In some cases, the infection may spread to other parts of the body, causing complications such as ear infections or inflammation of the heart or brain.

Diagnosis of 'Chlamydophila pneumoniae' infection typically involves testing a sample of respiratory secretions, such as sputum or nasal swabs, for the presence of the bacteria. Treatment usually involves antibiotics, such as azithromycin or doxycycline, which are effective against 'Chlamydophila pneumoniae'.

It's important to note that while 'Chlamydophila pneumoniae' infections can cause serious respiratory illness, they are generally not as severe as other types of bacterial pneumonia. However, if left untreated, the infection can lead to complications and worsening symptoms.

Prevalence, in medical terms, refers to the total number of people in a given population who have a particular disease or condition at a specific point in time, or over a specified period. It is typically expressed as a percentage or a ratio of the number of cases to the size of the population. Prevalence differs from incidence, which measures the number of new cases that develop during a certain period.

Immunoglobulin G (IgG) is a type of antibody, which is a protective protein produced by the immune system in response to foreign substances like bacteria or viruses. IgG is the most abundant type of antibody in human blood, making up about 75-80% of all antibodies. It is found in all body fluids and plays a crucial role in fighting infections caused by bacteria, viruses, and toxins.

IgG has several important functions:

1. Neutralization: IgG can bind to the surface of bacteria or viruses, preventing them from attaching to and infecting human cells.
2. Opsonization: IgG coats the surface of pathogens, making them more recognizable and easier for immune cells like neutrophils and macrophages to phagocytose (engulf and destroy) them.
3. Complement activation: IgG can activate the complement system, a group of proteins that work together to help eliminate pathogens from the body. Activation of the complement system leads to the formation of the membrane attack complex, which creates holes in the cell membranes of bacteria, leading to their lysis (destruction).
4. Antibody-dependent cellular cytotoxicity (ADCC): IgG can bind to immune cells like natural killer (NK) cells and trigger them to release substances that cause target cells (such as virus-infected or cancerous cells) to undergo apoptosis (programmed cell death).
5. Immune complex formation: IgG can form immune complexes with antigens, which can then be removed from the body through various mechanisms, such as phagocytosis by immune cells or excretion in urine.

IgG is a critical component of adaptive immunity and provides long-lasting protection against reinfection with many pathogens. It has four subclasses (IgG1, IgG2, IgG3, and IgG4) that differ in their structure, function, and distribution in the body.

"Seroepidemiologic studies of human T-cell leukemia/lymphoma virus type I in Jamaica". Int J Cancer. 36 (1): 37-41. doi:10.1002/ ... For example, one study in Japan found a 61% transmission rate for males to females vs. a less than 1% rate for females to males ... Two studies of blood samples from 1988 and 2006-07 showed the highest number of carriers was found in people born from 1927 to ... These studies established that the retrovirus infection is the cause of ATL. The retrovirus is now generally called HTLV-I ...
Abuharfeil N, Meqdam MM (2000). "Seroepidemiologic study of herpes simplex virus type 2 and cytomegalovirus among young adults ... According to a study in Ontario, of people between the ages of 15 and 16, 26.9% of men, 32% of non-pregnant women, and 55% of ... Many studies have been performed around the world to estimate the numbers of individuals infected with HSV-1 and HSV-2 by ... In Australia, a study using data from 1999 revealed the seroprevalence of HSV-1 was at 76.5%, with significant differences ...
January 2017). "CONSISE statement on the reporting of Seroepidemiologic Studies for influenza (ROSES-I statement): an extension ... December 2015). "Strengthening the Reporting of Observational Studies in Epidemiology for respondent-driven sampling studies: " ... seroepidemiologic studies for influenza, medical abortion, simulation-based research, newborn infection, veterinary, and sports ... An assessment of extension content as well as a survey of authors of observational studies provided several areas to improve ...
"Understanding the HIV/AIDS epidemic in transgender women of Lima, Peru: results from a sero-epidemiologic study using ... Based on a study done by Grimard et al., the shock of the violence had an adverse effect on pregnant women, often stunting the ... Studies among MSM in Peru have shown that trans women show a higher proportion of HIV infection. This is often linked to higher ... A 2015 study found that in about 81% of the cases of attempted femicide, no measures were taken by authorities to protect the ...
During the 2009 H1N1 pandemic, Katz and her team conducted serologic studies, provided laboratory support for seroepidemiologic ... Using existing models systems, her team studied the properties of virulence (disease severity) and transmissibility of pandemic ...
... cross-sectional studies MeSH G03.850.520.450.500.950 - seroepidemiologic studies MeSH G03.850.520.450.500.950.375 - hiv ... retrospective studies MeSH G03.850.520.450.500.750 - cohort studies MeSH G03.850.520.450.500.750.350 - follow-up studies MeSH ... multicenter studies MeSH G03.850.520.450.550 - feasibility studies MeSH G03.850.520.450.565 - intervention studies MeSH G03.850 ... epidemiologic study characteristics MeSH G03.850.520.450.500 - epidemiologic studies MeSH G03.850.520.450.500.500 - case- ...
... cross-sectional studies MeSH N05.715.360.775.175.800 - seroepidemiologic studies MeSH N05.715.360.775.175.800.375 - hiv ... retrospective studies MeSH N05.715.360.775.175.250 - cohort studies MeSH N05.715.360.775.175.250.350 - follow-up studies MeSH ... multicenter studies MeSH N05.715.360.775.350 - feasibility studies MeSH N05.715.360.775.390 - intervention studies MeSH N05.715 ... twin studies MeSH N05.715.360.780 - epidemiologic research design MeSH N05.715.360.780.150 - cross-over studies MeSH N05.715. ...
... prospective studies MeSH E05.318.760.500.875 - cross-sectional studies MeSH E05.318.760.500.950 - seroepidemiologic studies ... cohort studies MeSH E05.318.760.500.750.500 - longitudinal studies MeSH E05.318.760.500.750.500.350 - follow-up studies MeSH ... epidemiologic studies MeSH E05.318.760.500.500 - case-control studies MeSH E05.318.760.500.500.500 - retrospective studies MeSH ... multicenter studies MeSH E05.318.760.550 - feasibility studies MeSH E05.318.760.565 - intervention studies MeSH E05.318.760.750 ...
Before studying the case, they said a sequence of events, including changes in climate triggered by the La Niña climate pattern ... October 2013). "Seroepidemiologic survey of epidemic cholera in Haiti to assess spectrum of illness and risk factors for severe ... A separate study published in December in the New England Journal of Medicine presented DNA sequence data for the Haitian ... However, a study unveiled in December and conducted by French epidemiologist Renaud Piarroux contended that UN troops from ...
A NCBI-study found a previous HCoV-229E infection in 42.9% - 50.0% of children of 6-12 months of age and in 65% of those 2.5- ... Kaye, H. S.; Marsh, H. B.; Dowdle, W. R. (1971). "Seroepidemiologic survey of coronavirus (Strain OC 43) related infections in ...
Seroepidemiologic Study of Pandemic (H1N1) 2009 during Outbreak in Boarding School, England Sandra Johnson, Chikwe Ihekweazu. ... Seroepidemiologic Study of Pandemic (H1N1) 2009 during Outbreak in Boarding School, England. ... Association of demographic characteristics, clinical illness, and interventions with study participants positive serologic ...
The U.S. Millennium Cohort Study is a population-based prospective study that includes over 200,000 current and prior U.S. ... Seroepidemiologic Investigation of a COVID-19 Outbreak Aboard a U.S. Navy Ship Hospital Corpsman 2nd Class Shane Miller, left, ... One study suggested that the global prevalence for loss of taste or smell for those with COVID-19 was about 48%, a comparable ... This study highlights the value of rapid, onboard diagnostic testing to quickly identify an outbreak and enumerate cases, as ...
One study suggested that the global prevalence for loss of taste or smell for those with COVID-19 was about 48%, a comparable ... Seroepidemiologic Investigation of a COVID-19 Outbreak Aboard a U.S. Navy Ship Hospital Corpsman 2nd Class Shane Miller, left, ... This study highlights the value of rapid, onboard diagnostic testing to quickly identify an outbreak and enumerate cases, as ... This study is one of several that highlights the complexities of responding to a highly infectious respiratory virus outbreak ...
The overall birth prevalence of congenital CMV infection was 0.64%, but varied considerably among different study populations. ... We reviewed studies that reported results of systematic cytomegalovirus (CMV) screening on fetuses and/or live-born infants. ... We reviewed studies that reported results of systematic cytomegalovirus (CMV) screening on fetuses and/or live-born infants. ... About 11% of live-born infants with congenital CMV infection were symptomatic, but the inter-study differences in definitions ...
Seroepidemiologic Studies * Sex Factors * Socioeconomic Factors Substances * Aspartate Aminotransferases * Alanine Transaminase ...
... from data of seroprevalence studies. Methods Population... , Find, read and cite all the research you need on ResearchGate ... Join ResearchGate to discover and stay up-to-date with the latest research from leading experts in Seroepidemiologic Studies ... Studies on blood donors were included, but studies on healthcare workers were excluded. The studies were assessed for design ... major studies might have been missed. Information was extracted from each study on location, recruitment and sampling strategy ...
An ongoing seroepidemiologic study of the 185 of the 356 permanent residents of the Koster Islands in Sweden was expanded to ... An ongoing seroepidemiologic study of the 185 of the 356 permanent residents of the Koster Islands in Sweden was expanded to ... An ongoing seroepidemiologic study of the 185 of the 356 permanent residents of the Koster Islands in Sweden was expanded to ... An ongoing seroepidemiologic study of the 185 of the 356 permanent residents of the Koster Islands in Sweden was expanded to ...
seroepidemiologic studies. *chlamydia infections. WHAT IS ALREADY KNOWN ON THIS TOPIC. *. Nationwide chlamydia seroprevalence ... We did not observe trends within and between study rounds.. This is the first Ct seroprevalence study in the Netherlands to ... Second, we compared seroprevalence between age groups by study round. Last, we compared seroprevalence between study rounds by ... while our study found 9-10% in 2007/2017.4 A comparison study among women with a prior Ct infection, in which the Pgp3 assay ...
"Seroepidemiologic studies of human T-cell leukemia/lymphoma virus type I in Jamaica". Int J Cancer. 36 (1): 37-41. doi:10.1002/ ... For example, one study in Japan found a 61% transmission rate for males to females vs. a less than 1% rate for females to males ... Two studies of blood samples from 1988 and 2006-07 showed the highest number of carriers was found in people born from 1927 to ... These studies established that the retrovirus infection is the cause of ATL. The retrovirus is now generally called HTLV-I ...
Seroepidemiologic study of human infections with spotted fever group rickettsiae in North Carolina. J Clin Microbiol 2014;52: ... Controlled studies to assess the safety of doxycycline use in pregnant women have not been conducted, and available data are ... Studies of preventive antibacterial therapy for rickettsial infection in humans are limited. Available data (221) do not ... Studies on Rocky Mountain spotted fever. J Med Res 1919;41:1-198.41. PubMedexternal icon ...
Seroepidemiologic Study Designs for Determining SARS-COV-2 Transmission and Immunity. Article ... Studies for 1° and 2° were collated in [23]. Studies used for post-2° [22,28] were derived from [7]. N.S. = not stated. (XLSX) ... Serologic studies are crucial for clarifying dynamics of the coronavirus disease pandemic. Past work on serologic studies (e.g ... The most recent studies have estimated that it is responsible for 39 884 disability-adjusted life years (DALYs) annually, ...
PREVALENCE OF INFECTION WITH WATERBORNE PATHOGENS: A SEROEPIDEMIOLOGIC STUDY IN CHILDREN 6-36 MONTHS OLD IN SAN JUAN ...
Antibodies, Viral, COVID-19, Disease Outbreaks, Health Personnel, Humans, SARS-CoV-2, Seroepidemiologic Studies, Sweden/ ... Seroepidemiologic Studies; Sweden/epidemiology}}, language = {{eng}}, number = {{9}}, pages = {{707--712}}, publisher = {{ ... METHODS: In this study, we present the results of a serological screening of the healthcare workers (HCWs) on a ward for ... METHODS: In this study, we present the results of a serological screening of the healthcare workers (HCWs) on a ward for ...
Categories: Seroepidemiologic Studies Image Types: Photo, Illustrations, Video, Color, Black&White, PublicDomain, ...
Overall, each model has its advantages and disadvantages and is differentially suited for studies of dengue pathogenesis and ... A retrospective seroepidemiologic study. Am. J. Trop. Med. Hyg. 1990, 42, 179-184. [Google Scholar] ... 3. Animal Models Used for Immunopathogenesis Studies of Dengue. Epidemiological studies have demonstrated a clear correlation ... setting the stage for potential T cell studies [73]. Recently, a new model to study DENV-specific human T cell responses in ...
T. canis infections occur in canine animals throughout the world, as confirmed by seroepidemiologic studies. The prevalence of ... Study of the seroprevalence of toxocariasis in an infantile population in the City of Havana]. Rev Cubana Med Trop. 1994. 46(3 ... Seroepidemiological study of Toxocara infection in Nepal. Southeast Asian J Trop Med Public Health. 1996 Jun. 27(2):286-90. [ ... A study conducted in a tropical region of Venezuela illustrates the greater risk for disadvantaged sectors of society in ...
Corona Immunitas: study protocol of a nationwide program of SARS-CoV-2 seroprevalence and seroepidemiologic studies in ... Vienneau D, de Hoogh K, Faeh D, Kaufmann M, Wunderli JM, Röösli M ; SNC Study Group. More than clean air and tranquillity: ... a cross-sectional analysis of 9444 participants from a population-based study in Basel-Stadt and Basel-Landschaft *Ayoung Jeong ... or month of study entry. In addition, we assessed if the association is attributed to specific types of greenspace or ...
Shirao M, Yoshimura K, Mochizuki M, Araki S, Miyata N, Yamaguchi K. A seroepidemiologic study of HTLV-I uveitis. Proceedings of ... a nation-wide sero-epidemiologic study. Int J Cancer 1982;29:631-5.. *Murphy EL, Figueroa JP, Gibbs W, et al. Human T- ... One study of 20 non-breast-fed children born to HTLV-II-infected women in New York City failed to show evidence of transmission ... In one study of married couples in Japan, the efficiency of sexual transmission from males to females was estimated to be 60.8 ...
CONSISE statement on the reporting of Seroepidemiologic Studies for influenza (ROSES-I statement): an extension of the STROBE ... Strengthening the Reporting of Observational Studies in Epidemiology for Respondent -Driven Sampling Studies: STROBE-RDS ... Strengthening the Reporting of Observational Studies in Epidemiology for Respondent-Driven Sampling Studies: STROBE-RDS ... Strengthening the Reporting of Observational Studies in Epidemiology for Respondent-Driven Sampling Studies: STROBE-RDS ...
CONSISE statement on the reporting of Seroepidemiologic Studies for influenza (ROSES-I statement): an extension of the STROBE ... The REporting of studies Conducted using Observational Routinely-collected health Data (RECORD) Statement. Reporting guideline ... Strengthening the Reporting of Observational Studies in Epidemiology for respondent-driven sampling studies: "STROBE-RDS" ... STrengthening the REporting of Genetic Association Studies. STrengthening the REporting of Genetic Association Studies (STREGA ...
Corona Immunitas: study protocol of a nationwide program of SARS-CoV-2 seroprevalence and seroepidemiologic studies in ... Swiss Study of HIV Mother + Child Cohort (MoCHiV) aims to collect data on the pregnancy and delivery of HIV-infected women as ... Swiss Autoimmune Hepatitis Cohort Study (SASL38). Pascal Müller. Swiss Cerebralpalsy Registry (Swiss-CP-Reg). Christoph Künzle ... BILD and PASTURE study groups. Protective effects of breastfeeding on respiratory symptoms in infants with 17q21 asthma risk ...
Seroepidemiologic Cohort Study. Journal of Infectious Diseases, 2019. 219(3): p. 347-357. ... Some studies suggest that herd immunity may also be achieved in nursing homes if immunisation coverage of residents is greater ... Recent studies have shown that influenza vaccines containing less than 1 µg of ovalbumin do not trigger anaphylaxis in ... Studies in New Zealand and overseas have found that provider attitudes and provider recommendations are key to improving ...
Seroepidemiologic study on Lyme borreliosis in the Lublin region.. Chmielewska-Badora, J., 2003. Ann Agric Environ Med. 5, 183- ... Seroprevalence study of Tick-borne encephalitis, Borrelia burgdorferi, Dengue and Toscana virus in Turin Province. ... Do not change sample type during studies. We recommend duplicate measurements for all samples and standards. The sample ...
Seroepidemiologic Studies. Call Number:. FPSK(m) 2020 41. Chairman Supervisor:. Syafinaz Amin Nordin, MBChB, MPath. ... The study is a cross- sectional study involving 112 infertile couples who underwent fertility treatment at LPPKN Subfertility ... The response rate of this study was 97.39%. Majority of the respondents were aged between 25-34 years old and dominated by ... The objectives of this study are to determine the seroprevalence of Chlamydia trachomatis (CT) among subfertile couples ( ...
Seroepidemiologic Studies, severe acute respiratory syndrome coronavirus 2, Spike Glycoprotein, Coronavirus ... The SEROCoV-POP study is a population-based study of former participants of the Bus Santé study and their household members. ... Similar to other studies in Europe and the United States, SEROCoV-POP revealed a low seroprevalence to SARS-CoV-2 in ... With some studies reporting a rapid loss of antibodies weeks after exposure to SARS-CoV-2, the seroprevalence might be an ...
Calorimetric study of skutterudite (CoAs2.92) and heazlewoodite (Ni3S2). Majzlan, J., Kiefer, S., Lilova, K., Subramani, T., ... An interlaboratory study to evaluate the forensic analysis and interpretation of glass evidence. Lambert, K., Montero, S., ... Lessons Learned from Online Learning at Scale: a Study of Exemplar Learning Organizations. Li, S., Craig, S. D. & Schroeder, N ... Construction inspection & monitoring with quadruped robots in future human-robot teaming: A preliminary study. Halder, S., ...
Bergen-Cico, D. K., Razza, R. A. & Timmins, A., Nov 1 2015, In: Journal of Child and Family Studies. 24, 11, p. 3448-3461 14 p. ... Fostering Self-Regulation Through Curriculum Infusion of Mindful Yoga: A Pilot Study of Efficacy and Feasibility. ... Improving wear time compliance with a 24-hour waist-worn accelerometer protocol in the International Study of Childhood Obesity ...
  • The Bus Santé is a study of a yearly sample of the Geneva canton population that includes 500 men and 500 women who fill standardized questionnaires covering risk factors for chronic diseases, sociodemographic, occupational, and educational histories. (acc.org)
  • The overall birth prevalence of congenital CMV infection was 0.64%, but varied considerably among different study populations. (nih.gov)
  • Maternal seroprevalence accounted for 29% of the variance in birth prevalence between study populations. (nih.gov)
  • Maternal seroprevalence and birth prevalence were both higher in study populations that were ascertained at birth rather than in the prenatal period. (nih.gov)
  • 95% confidence interval, 7.0%-12.2%), and prevalence had been initiated to study the effect of dietary supple- was lowest in the most geographically isolated participants. (cdc.gov)
  • collected in this study to estimate the prevalence of hepa- titis B virus (HBV), HCV, and HIV-1 among older adults in Linxian in 2000. (cdc.gov)
  • Other smaller ticipation, 12% were not living in Linxian at the time due studies have reported HCV prevalence rates of 0% to 3% to temporary employment, 4% were excluded for medical in rural populations from various Chinese provinces (5-7). (cdc.gov)
  • A CITF-funded study, published in Research Synthesis Methods, found that implementing a natural language processing (NLP) tool for abstract screening in a living systematic review of SARS-CoV-2 prevalence was feasible and beneficial in a real-world context. (covid19immunitytaskforce.ca)
  • We estimated the population prevalence of antibodies to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), including unreported infections, through a Seroprevalence Study of Monitoring of SARS-CoV-2 Antibody Retention and Transmission (K-SMART) in 258 communities throughout Korea. (e-epih.org)
  • Prevalence and sociobehavioural data among DUs are therefore available in most countries but no study has taken into account in the sampling weights one important aspect of the way of life of DUs, namely that they can use one or more specialized services during the study period. (hal.science)
  • Strengthening the Reporting of Observational Studies in Epidemiology for Respondent-Driven Sampling Studies: 'STROBE-RDS' Statement. (equator-network.org)
  • The Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) Statement: guidelines for reporting observational studies. (equator-network.org)
  • A national cross-sectional study among drug-users in France: epidemiology of HCV and highlight on practical and statistical aspects of the design. (hal.science)
  • BACKGROUND: Epidemiology of HCV infection among drug users (DUs) has been widely studied. (hal.science)
  • Seroprevalence of Anti-SARS-CoV-2 IgG Antibodies in Geneva, Switzerland (SEROCoV-POP): A Population-Based Study. (acc.org)
  • Over the course of the study, 219 of 2,766 tested positive for SARS-CoV-2 IgG antibodies. (acc.org)
  • The study estimates 1 in 10 people have developed detectable antibodies against SARS-CoV-2 in Switzerland. (acc.org)
  • With some studies reporting a rapid loss of antibodies weeks after exposure to SARS-CoV-2, the seroprevalence might be an underestimate of the true exposure. (acc.org)
  • A study funded and led by the CITF, published in CMAJ , found that as of March 2023, over 75% of people in Canada had antibodies due to a SARS-CoV-2 infection. (covid19immunitytaskforce.ca)
  • In a study now published in Infectious Diseases , CITF-funded researchers from Héma-Québec reported on the development of a novel analytical approach to detect recent SARS-CoV-2 infections based on anti-nucleocapsid antibodies. (covid19immunitytaskforce.ca)
  • Methods and Results- We analyzed enrollment sera from 3168 Canadian patients in the Heart Outcomes Prevention Evaluation (HOPE) study for antibodies to C pneumoniae , H pylori , CMV, and HAV and measured the relation between serostatus and 494 adjudicated trial outcomes of myocardial infarction, stroke, or CV death over 4.5 years of follow-up. (mcmaster.ca)
  • This study was undertaken to (1) assess the presence of maternally acquired measles-specific IgG antibodies among infants less than 9 months of age in Bangui, Central African Republic and (2) determine the immune status of vaccination-age children and the concordance with reported vaccination status. (hal.science)
  • The K-SMART represents the first nationwide, community-based seroepidemiologic survey of COVID-19, confirming that most individuals possess antibodies to SARS-CoV-2 and that a significant number of unreported cases existed. (e-epih.org)
  • Furthermore, although numerous studies exist on the pathogenicity of various waterborne pathogens few have sought to describe their life history or ecology. (nationalacademies.org)
  • Furthermore, this study lays the foundation for a surveillance system to continuously monitor transmission at the community level and the response to COVID-19. (e-epih.org)
  • The moderate risk of RESTV recurring among humans in the Philippines and its potential pathogenicity in humans reinforces the need for early detection, surveillance and continued studies of RESTV pathogenesis and its health consequences. (who.int)
  • Men who provide traditional viral RNA for confirmation of HCV infections are a serious global public barber services were identified and en- infection. (who.int)
  • Conclusions- Exposure to CMV but not to C pneumoniae , H pylori , or HAV was associated with a slight excess risk of subsequent myocardial infarction, stroke, or CV death in HOPE study patients, and total pathogen score based on these infections predicted a small increased hazard of CV events. (mcmaster.ca)
  • Methods Population studies with sample size of at least 500 and published as peer-reviewed papers or preprints as of May 12, 2020 were retrieved from PubMed, preprint servers, and communications with experts. (researchgate.net)
  • A CITF-funded study, published in preprint and not yet peer-reviewed, found that the reporting of SARS-CoV-2 seroepidemiologic studies needs improvement, particularly in providing adequately detailed information about laboratory methods. (covid19immunitytaskforce.ca)
  • CITF-funded researchers at Héma-Québec, led by Drs. Marc Germain and Dr. Renée Bazin, published a preprint, not yet peer reviewed, reporting on the characteristics of the plasma donors whose samples are used to study COVID-19 immunity in Quebec. (covid19immunitytaskforce.ca)
  • ABSTRACT A cross-sectional seroepidemiological study was conducted in the Rabat-Salé-Zemmour-Zaër region of Morocco in 2007 among 267 barbers and 529 clients, all men with no history of hepatitis B (HBV) vaccination. (who.int)
  • Methods Participants (n=5158, aged 15-59 years) were included from three independent nationwide population-based serosurveillance studies in 1996, 2007 and 2017. (bmj.com)
  • METHODS: In this study, we present the results of a serological screening of the healthcare workers (HCWs) on a ward for infectious diseases in Sweden with a point-of-care antibody test 8 weeks after an outbreak of COVID-19. (lu.se)
  • This is the earliest documented COVID-19 study with RT-PCR, serology, and pre-exposure test data on the entirety of the exposed population (n=333). (health.mil)
  • The objectives of this study are to determine the seroprevalence of Chlamydia trachomatis (CT) among subfertile couples (husband and wife) of The Lembaga Penduduk dan Pembangunan Keluarga Negara (LPPKN) Subfertility Clinic and the factors associated with it (i.e. socio-demographic, duration of marriage, infertility factor, knowledge, attitude, practice of risky sexual behaviour (RSB) and predictors of Chlamydia trachomatis infection). (upm.edu.my)
  • Socio-economic factors and the outcomes of this seroprevalence study enable us to identify priority areas for intervention. (biomedcentral.com)
  • Overall, each model has its advantages and disadvantages and is differentially suited for studies of dengue pathogenesis and immunopathogenesis and/or pre-clinical testing of antiviral drugs and vaccines. (mdpi.com)
  • Objective To estimate the infection fatality rate of coronavirus disease 2019 (COVID-19) from data of seroprevalence studies. (researchgate.net)
  • Estimates of infection fatality rates inferred from seroprevalence studies tend to be much lower than original speculations made in the early days of the pandemic. (researchgate.net)
  • Seroprevalence studies provide an accurate measure of SARS-CoV-2 spread and the presence of asymptomatic cases. (biomedcentral.com)
  • Thus, seroprevalence studies identify the infection burden in communities leading to more appropriate control measures for local epidemic expansion. (biomedcentral.com)
  • This study highlights the value of rapid, onboard diagnostic testing to quickly identify an outbreak and enumerate cases, as well as the serological testing to flag potential cases missed with standard viral case identification methodologies. (health.mil)
  • Fancourt D, Steptoe A, Bu F. Trajectories of anxiety and depressive symptoms during enforced isolation due to COVID-19 in England: a longitudinal observational study. (smw.ch)
  • Zavada J, Dixon WG, Askling J. Launch of a checklist for reporting longitudinal observational drug studies in rheumatology: a EULAR extension of STROBE guidelines based on experience from biologics registries. (equator-network.org)
  • STrengthening the REporting of Genetic Association Studies. (equator-network.org)
  • STrengthening the REporting of Genetic Association Studies (STREGA): An Extension of the STROBE Statement. (equator-network.org)
  • First draft of the STROBE checklist of items to be included when reporting observational studies in conference abstracts. (equator-network.org)
  • Sharp SJ, Poulaliou M, Thompson SG, White IR, Wood AM. A review of published analyses of case-cohort studies and recommendations for future reporting. (equator-network.org)
  • The REporting of studies Conducted using Observational Routinely-collected health Data (RECORD) Statement. (equator-network.org)
  • Researchers showed that there was a median adherence to reporting items of 48% per study, as evaluated via the Reporting of Seroepidemiologic studies-SARS-CoV-2 (ROSES-S) guideline. (covid19immunitytaskforce.ca)
  • Background We studied humoral and cellular responses against SARS-CoV-2 longitudinally in a homogeneous population of healthy young/middle-aged men of South Asian ethnicity with mild COVID-19. (researchgate.net)
  • The SEROCoV-POP study is a population-based study of former participants of the Bus Santé study and their household members. (acc.org)
  • After inviting 6,229 participants of the Bus Santé study, the authors enrolled 2,834 in SEROCoV-POP, of whom 2,766 had complete data. (acc.org)
  • The study is a cross- sectional study involving 112 infertile couples who underwent fertility treatment at LPPKN Subfertility Clinic from February 2018 until February 2019. (upm.edu.my)
  • About 11% of live-born infants with congenital CMV infection were symptomatic, but the inter-study differences in definitions of symptomatic cases limit the interpretation of these data. (nih.gov)
  • Magnesium-based, bioresorbable implants for pediatric elbow fractures, a single center pilot study for osteosynthesis with Magnezix screws in fractures of the Epicondylus ulnaris and Condylus radialis. (kispisg.ch)
  • been studied (2), but the distribution of HCV varies con- siderably among populations. (cdc.gov)
  • The studies were assessed for design features and seroprevalence estimates. (researchgate.net)
  • In a nationwide study conducted cer, the most common cancers in the Linxian region. (cdc.gov)
  • In 2004-2005, we conducted a national seroepidemiologic survey of DUs, based on a random sampling design using the Generalised Weight Share Method (GWSM) and on blood testing. (hal.science)
  • Results Twelve studies were identified with usable data to enter into calculations. (researchgate.net)
  • The study data might open a new window for improvement in the treatment of hypertensive patients with COVID-19 and myocardial injury. (bvsalud.org)
  • We reviewed studies that reported results of systematic cytomegalovirus (CMV) screening on fetuses and/or live-born infants. (nih.gov)
  • Sixteen patients (ten with one or more intestinal fistula) developed abdominal wall dehiscence were included in this study. (who.int)
  • Similar to other studies in Europe and the United States, SEROCoV-POP revealed a low seroprevalence to SARS-CoV-2 in Switzerland, despite being an area with a relatively high number of cases. (acc.org)
  • Journal of Child and Family Studies. (syr.edu)
  • Recent studies provided evidence on the relationship between social status and exposure patterns, the likelihood of diagnosis, and infection outcomes for COVID-19 in Santiago. (biomedcentral.com)
  • Studies on blood donors were included, but studies on healthcare workers were excluded. (researchgate.net)
  • Two studies of blood samples from 1988 and 2006-07 showed the highest number of carriers was found in people born from 1927 to 1937 (people age 8 to 18 in 1945). (wikipedia.org)