title: Estimating HIV-1 incidence using the serologic testing algorithm for recent HIV infections at HIV counseling and testing centers in the city of São Paulo, Brazil.
abstract: 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. We examined HIV-1 incidence from November 2000 to April 2001, comparing epidemiological and socio-behavioral data of recently-infected individuals with those with long-standing infection. A less sensitive ELISA was employed to identify recent infection. The overall incidence of HIV-1 infection 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.
authors: Coordenação Municipal de DST/AIDS - Secretaria Municipal de Saúde de São Paulo, Brazil.
authors: Katia Cristina
authors: KC
authors: Bassichetto
authors: Denise Pimentel
authors: DP
authors: Bergamaschi
authors: Maria Amelia
authors: MA
authors: Veras
authors: Maria Cecilia Araripe
authors: MC
authors: Sucupira
authors: Fabio
authors: F
authors: Mesquita
authors: Ricardo Sobhie
authors: RS
authors: Diaz
mesh_terms: D000328:Adult; D000465:Algorithms; D001938:Brazil / Q000453:epidemiology; D003376:Counseling; D004797:Enzyme-Linked Immunosorbent Assay; D016021:Epidemiologic Studies; D005260:Female; D015658:HIV Infections / Q000175:diagnosis / Q000453:epidemiology* / Q000821:virology; D015497:HIV-1 / Q000276:immunology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012959:Socioeconomic Factors; D055815:Young Adult