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- Document 2340
- DOCN M94A2340
- TI Results of three consecutive inquiries for HIV infection sentinel
- surveillance among sexually transmitted diseases patients in Porto
- Alegre, RS Brazil.
- DT 9412
- AU Loureiro R; Balsan M; Ramos M; Silveira V; Becker F; Ferreira J
- SO Int Conf AIDS. 1994 Aug 7-12;10(1):326 (abstract no. PC0237). Unique
- Identifier : AIDSLINE ICA10/94370235
- AB OBJECTIVE: Estimate Instantaneous Prevalence of HIV infection over time
- in STD patients sentinel population. METHODS: Three inlinked anonymous
- cross-sectional tests with a six-month interval between then;
- consecutive sampling of the first consultation male patients who seek
- care in a free urban STD Clinic; blood collected for VDRL was separeted
- and identified only with date and age group (no other identifier to
- preserve anonymity). Women were excluded (reduced number of female
- patients in the study periods). The sample were achieved in about six
- weeks. Screening test: second generation ELISA. Confirmatory test:
- Indirect Immunofluorescence. Internal/external quality control was
- adopted (State Reference Laboratory). RESULTS: First inquiry
- (may-jun,1992): 18 positive in 400 blood samples, prevalence = 4.5%, SD
- = 1.04; CI = 2.46-6.54 (95%-alpha = 0.05); 2.80-6.20 (90%-alpha = 0.10).
- Second inquiry (nov-dec,1992): 20 in 400 blood samples were positive
- with a prevalence of 5.0%; SD = 1.08; CI = 2.88-7.12 (95%-alpha = 0.05);
- 3.23-6.77 (90%-alpha = 0.10). Third inquiry (may-jun,1993): 22 positive
- in 408 blood samples, prevalence: 5.4%; SD = 1.12; CI = 3.21-7.59
- (95%-alpha = 0.05); 3.56-7.24 (90%-alpha = 0.10). CONCLUSIONS: The
- founds reveals high prevalences among high-risk population, but no
- significant difference were observed between the first and the two
- subsequent studies. Probabily a six-month interval is very small to
- identify prevalence changes in this population. So the decision was to
- follow the studies with a twelve-month intervals between eat inquiry. We
- demonstrated the feasibility and usefulness of the sentinel surveillance
- of HIV infection proposed by GPA/WHO to orient prevention and control
- activities. The anonymous inlinked method avoid participation bias.
- DE Adult Brazil/EPIDEMIOLOGY Cross-Sectional Studies *Developing
- Countries Enzyme-Linked Immunosorbent Assay Human HIV
- Infections/*EPIDEMIOLOGY/TRANSMISSION Incidence Male *Population
- Surveillance Sexually Transmitted Diseases/*EPIDEMIOLOGY/TRANSMISSION
- MEETING ABSTRACT
-
- SOURCE: National Library of Medicine. NOTICE: This material may be
- protected by Copyright Law (Title 17, U.S.Code).
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-