TY  - JOUR
AU  - Bassichetto, Katia Cristina 
AU  - Bergamaschi, Denise Pimentel 
AU  - Veras, Maria Amelia 
AU  - Sucupira, Maria Cecilia Araripe 
AU  - Mesquita, Fabio 
AU  - Diaz, Ricardo Sobhie 
PY  - 2008
TI  - Estimating HIV-1 Incidence Using the Serologic Testing Algorithm for Recent HIV Seroconversion at HIV Counseling and Testing Centers in the City of São Paulo, Brazil
JF  - American Journal of Infectious Diseases
VL  - 4
IS  - 4
DO  - 10.3844/ajidsp.2008.257.261
UR  - https://thescipub.com/abstract/ajidsp.2008.257.261
AB  - The network of HIV counseling and testing centers in São Paulo, Brazil is a major source of data used to build epidemiological profiles of the client population. In this study, HIV-1 incidence from November of 2000 to April of 2001 was estimated, comparing recently infected individuals to those with long-standing infection in terms of epidemiological and socio-behavioral aspects. To identify recent infection, less sensitive ELISA was employed. The overall incidence of HIV-1 infection among the clients was 0.53/100/year (95% CI: 0.31-0.85/100/year): 0.77/100/year for males (95% CI: 0.42-1.27/100/year) and 0.22/100/year (95% CI: 0.05-0.59/100/year) for females. Overall HIV-1 prevalence was 3.2% (95% CI: 2.8-3.7%), being 4.0% among males (95% CI: 3.3-4.7%) and 2.1% among females (95% CI: 1.6-2.8%). Recent infections accounted for 15% of the total (95% CI: 10.2-20.8%). Recent infection correlated with being younger and male (p = 0.019). Therefore, recent infection was more common among younger males and older females.