Seroepidemiology
Mostrando 25-36 de 55 artigos, teses e dissertações.
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25. O-antigen seroepidemiology of Klebsiella clinical isolates and implications for immunoprophylaxis of Klebsiella infections.
To provide a database for the development of an O-antigen-polysaccharide-containing vaccine against Klebsiella spp., we examined the O-antigen seroepidemiology of 378 Klebsiella clinical isolates collected prospectively in two university centers. Strains were typed by competitive enzyme-linked immunosorbent assay with rabbit antisera specific for serogroups
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26. Seroepidemiology of chlamydia in Costa Rica.
A population-based study of the sero-epidemiology of chlamydia was performed among a nationally representative sample of 760 Costa Rican women aged 25 to 59 years. Interviews and sera collection were completed between September 1984 and February 1985. The overall seroprevalence of chlamydial antibodies among these women was 56.1%. Women 25 to 39 years of age
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27. Seroepidemiology of rotavirus infection in rural Bangladesh.
A prospective seroepidemiological study of rotavirus infection was performed in children in a village in rural Bangladesh. Ninety-three percent of the children had detectable antibodies during the study, and there were 66 significant rises in titer occurring in 57 of the 85 children. Antibody titer rises occurred in older children and younger children with e
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28. Seroepidemiology of human herpesvirus 6 infection in normal children and adults.
Sera from normal subjects were examined for reactivity to human herpesvirus 6 (HHV-6) by the anticomplement immunofluorescence test. Of a total of 179 serum specimens from donors aged from under 10 to 59 years, 141 specimens showed positive reactivity against HHV-6. The positive rate was 70 to 83% for all age groups, and there were no substantial differences
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29. Seroepidemiology of clinical isolates of Klebsiella in Connecticut.
The distribution of capsular serotypes of 200 clinical isolates of Klebsiella pneumoniae and Klebsiella oxytoca from four Connecticut hospitals was determined. Serotyping was done by an indirect fluorescent-antibody technique. Hospitals included three community hospitals from the Hartford area and one university hospital in New Haven. During the test period,
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30. Hepatitis B, tropical ulcers, and immunisation strategy in Kiribati.
The seroepidemiology of hepatitis B was studied in Kiribati (formerly the Gilbert Islands). Six hundred and two (98%) of the population studied showed evidence of current or previous infection. The prevalence of hepatitis B surface antigen was 31% (188/615) and of the e antigen was 9% (58/615). Infection was acquired early in life, and the prevalence of both
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31. Measurement of antibodies to varicella-zoster virus in a tropical population by enzyme-linked immunosorbent assay.
We used the recently developed enzyme-linked immunosorbent assay for antibody to varicella-zoster virus to study the prevalence and titers of virus-specific antibody in a south Indian population of 171 individuals 0 to 25 years old. The antibody prevalence rate was less than 15% in individuals under 5 years of age and gradually rose to a maximum of 72% in yo
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32. Seroepidemiology of Helicobacter pylori infection in a cohort of children monitored from 6 months to 11 years of age.
A cohort of Swedish children was monitored from 6 months to 11 years of age. Immunoglobulin G (IgG) and IgA antibodies to Helicobacter pylori were measured in 1,857 serum samples, drawn at the ages of 6, 8, 10, 18 months and 2, 4, and 11 years. Of the 294 children, 40 (13.6%) were found to have been infected at some time. However, at 11 years of age, only 6
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33. Seroepidemiology of rubella in Saudi Arabia: an adapted vaccination policy.
Rubella haemagglutination antibodies were tested for in sera of 1793 unvaccinated subjects with age ranging from birth to 40 years. This was to assess the immune status of the population and to see the feasibility of introduction and the proper age for rubella vaccination in a Saudi community. Those with titres of greater than or equal to 1:8 were considered
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34. Enzyme-Linked Immunosorbent Assay for Helicobacter pylori Needs Adjustment for the Population Investigated
Helicobacter pylori infection and peptic ulcer disease are common in developing countries, e.g., Vietnam. An enzyme-linked immunosorbent assay (ELISA) for screening of patients and for seroepidemiology is a useful tool but needs to be validated in the population studied. We used in-house ELISA with sonicated Swedish and Vietnamese strains as antigens to meas
American Society for Microbiology.
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35. Seroepidemiology of water-borne hepatitis in India and evidence for a third enterically-transmitted hepatitis agent.
Many epidemics of water-borne hepatitis have occurred throughout India. These were thought to be epidemics of hepatitis A until 1980, when evidence for an enterically transmitted non-A, non-B hepatitis was first reported. Subsequently, hepatitis E virus was discovered and most recent epidemics of enterically transmitted non-A, non-B hepatitis have been attri
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36. Serum antibodies to Trichomonas vaginalis in invasive cervical cancer patients.
OBJECTIVE--To evaluate, by seroepidemiology, the possible role of the sexually-transmitted flagellate, Trichomonas vaginalis, in invasive cervical cancer. SUBJECTS AND METHOD--Sera from 121 invasive cervical cancer patients and 242 random age-matched female controls. Antibodies to T. vaginalis were detected by the western blot technique. RESULTS--Antibodies