XVIII International AIDS Conference


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MSM in Brazil: baseline national data for prevalence of HIV

Presented by Ligia Kerr (Brazil).

L. Kerr1, A. Pinho2, M. Mello2, I. Dourado3, M. Guimarães4, S. Batista5, F. Abreu6, A. Brito7, A. Benzaken8, L. Oliveira9, A. Moraes10, E. Hamann11, G. Freitas12, W. McFarland13, G. Rutherford13, C. Kendall14, E. Albuquerque2, R.S. Mota1, MSM group for HIV baseline in Brazil

1Universidade Federal do Ceará, Saúde Comunitária, Fortaleza, Brazil, 2Fundação Oswaldo Cruz, CICT, Rio de Janeiro, Brazil, 3Universidade Federal da Bahia, Instituto de Saúde Coletiva, Salvador, Brazil, 4Universidade Federal de Minas Gerais, Medicina Preventiva, Belo Horizonte, Brazil, 5Universidade Federal do Rio de Janeiro, NESC, Rio de Janeiro, Brazil, 6Secretaria de Saúde de Santos, Santos, Brazil, 7Fundação Oswaldo Cruz, Centro de Pesquisas Aggeu Magalhães, Reicife, Brazil, 8Fundação Alfredo da Mata, Manaus, Brazil, 9Secretaria de Saúde de Curitiba, Curitiba, Brazil, 10Secretaria de Saúde de Itajaí, Itajaí, Brazil, 11Universidade de Brasília, Saúde Coletiva, Brazília, Brazil, 12Secretaria de Saúde de Campo Grande, Campo Grande, Brazil, 13University California San Francisco, Institute for Global Health, San Francisco, Brazil, 14Tulane University School of Public Health and Tropical Medicine, Center for Global Health Equity, New Orleans, United States

Background: Second generation biological and behavioral surveillance in higher risk populations is required in M&E plans for HIV/AIDS in every country in the world. Brazil has an active and successful surveillance program ongoing in many cities, but no baseline national data for MSM exist.
Methods: A cross-sectional surveillance study of HIV seroprevalence and behavior utilizing Respondent Driven Sampling was conducted in 10 Brazilian cities distributed across the country. Three thousand eight hundred and fifty nine men who reported having sex with another man in the last 12 months, 18 years of age or older, and living in those cities were interviewed and offered an HIV test. Data were analyzed with RDSAT 5.6. Weights were calculated and entered into STATA 10© for final analysis. In addition to results from each site, the samples were treated as independent clusters, weighted by MSM population size estimate in each city and an aggregated average calculated to satisfy national reporting requirements.
Results: We will report three results for each variable: the aggregate average, the lowest reported value, and the highest reported value, each with confidence intervals.

VariableAggregate Value (%)95% CIMax. Value by City (%)95% CIMin. Value by City (%)95% CI
% MSM testing for HIV in the last 12 months and know the result19.417.1 - 21.837.630.5 - 45.311.28.6 - 14.6
% MSM who correctly identify ways of preventing sexual transmission, and reject misconceptions47.844.5 - 51.274.765.7 - - 36.1
% MSM who used a condom in their last sexual act with their regular partner53.947.9 - 59.962.452.5 - 71.340.228.1 - 53.7
% MSM who used a condom in their last sexual act with a casual regular partner48.141.1 - 55.172.359.9 - 81.939.725.8 - 55.5
HIV Seroprevalence rate12.610.1 - 15.520.614.9 - - 8.9
% of MSM that think they are ate low risk of HIV infection75.173.7 - 76.587.584.0 - 91.058.352.7 - 63.8
[HIV prevalence rate and some indicators]

Conclusions: This presentation will discuss methodological and substantive issues in ongoing surveillance for most-at-risk populations. MSM in Brazil are at very high risk of infection by HIV, although the survey reports they do not perceive themselves at high risk. These data call for a major effort in these communities.

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