International Journal of Epidemiology 2003;32:735-740
© International Epidemiological Association 2003
Special Theme: Infectious Diseases |
High human immunodeficiency virus type 1 seroprevalence in men who have sex with men in Buenos Aires, Argentina: risk factors for infection
National Reference Center for AIDS, Buenos Aires, Argentina.
2 Nexo NGO, Buenos Aires, Argentina.
3 US Naval Medical Research Center Detachment (NMRCD), Lima, Peru.
Dr Maria Mercedes Avila, Centro Nacional de Referencia para el SIDA. Departamento de Microbiología, Parasitología e Inmunología. Facultad de Medicina, Universidad de Buenos Aires, Paraguay 2155, Piso 11, C1121ABG, Buenos Aires. E-mail: mavila{at}fmed.uba.ar
Objective To determine human immunodeficiency virus (HIV) seroprevalence in a sample of men who have sex with men (MSM) in Buenos Aires City and to identify risk factors associated with HIV type 1 infection.
Methods Participants were invited to receive HIV counselling and testing at ‘NEXO’ (a gay non-governmental organization) by means of informative leaflets distributed in gay nightclubs, porno cinemas, gymnasiums, and in the streets. During the encounter, the study was explained by a trained social worker and individuals were invited to volunteer for the study. Diagnosis of HIV was performed using two screening tests and Western Blot assay was used as confirmatory.
Results Human immunodeficiency virus was detected in 96 (13.8%; 95% CI: 11.4–16.7) of 694 MSM. Fourteen (14.6%) of the 96 HIV-positive MSM were already aware of their HIV serostatus. In univariate analysis, HIV-1 infection (odds ratio [OR] >1.5) was found to be associated with older age (30–39 years), being unemployed, a previous sexually transmitted disease (STD) history, and having an HIV-positive partner. Cocaine consumption and irregular use of condoms with occasional partners were also found to be risk factors. In multivariate logistic regression analysis, being unemployed (OR = 3.42; 95% CI: 1.17–9.99) and having an HIV-positive partner (OR = 2.67; 95% CI: 1.09–6.52) remained significant risk factors.
Discussion The high HIV-1 prevalence observed suggests an urgent need for implementation of effective prevention campaigns. This represents the first cross-sectional epidemiological study of HIV among the high-risk group of MSM in Argentina.
Keywords HIV-1, MSM, epidemiology, risk factors, Argentina
Accepted 9 January 2003
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