HIV seroincidence estimates among vulnerable populations in Buenos Aires using a serologic testing algorythm for recent HIV seroconversion.

M.VIGNOLES, M.M.AVILA, L.MARTÍNEZ PERALTA, M.PANDO, H.SHEPPARD, S.MAULEN, G. RADULICH, D.ROSSI, E. MUZZIO, J.BENETUCCI, M.WEISSENBACHER.

Río de Janeiro, Brasil

Congreso; 3rd IAS CONFERENCE ON HIV PATHOGENESIS AND TREATMENT; 2005

International AIDS Society

Introduction: rhe aim of this study was to estimate the incidence of HIV·1 infection in populations with different routes of transmission where few or no incidence studies have been carried out, using the STARHS. Methods: Serum samples from 6 HIV seroprevalence surveys, conducled in Buenos Aires in different populations were used. These were: men who have sex with men (MSM), injecting drug users (IDU), asymptomatic women consulting for an HIV infection (AW), heterosexual individuals consulting about new sexually transmitted infeclions (STI), individuals with tuberculosis (TB), and non-injecting cocaine users (NICU). HIV-1 seropositive were tested with the modified Vironostika HIV-1 Microelisa System. Using a window period of 170 days and cut-off: 1.0 annual incidence estimates were caltulated with STARHS. The adjusted annual seroincidence was: 6.7 for MSM; 0.0 for IDU; 2.0 for STI; 3.4 for NICU and 2.4 for TB. Conclusions: The high HIV incidence found in some vulnerable populations fram Buenos Aires indicate the urgent need to implement prevention campaigns.