Prevalence and risk factors for HBV infection among street youth in central Brazil.
OBJECTIVE
A seroprevalence survey was carried out among 496 street adolescents from 9 to 20 years old in central Brazil to determine the prevalence of hepatitis B (HBV) markers, as well as to assess the role of potential risk factors.


RESULTS
The findings reveal that 20.4% of the participants were homeless adolescents without family links, living and/or working on the streets. The age at first sexual intercourse was as low as 9 years old, and approximately 60% of this population had had at least one sexual relationship by the age of thirteen, indicating prepubertal initiation of sexual experiences among street adolescents. 13.5% were HBV marker-positive (anti-HBc) and 2.0% had antigenemia. Street-based youth had a higher HBV marker-positive rate when compared to home-based teens (OR = 4.1, 95% CI: 2.1-8.5) and, similarly, higher HBV prevalence was obtained for those reporting sexual activity versus the group without sexual activity (OR = 2.1, 95% CI: 1.1-3.9), even after adjusting for potential confounders.


CONCLUSIONS
We have found that street youth, particularly street-based adolescents, should be considered at-risk group for hepatitis B infection in our region. These findings may be used as a baseline information for policy changes not only in hepatitis B prevention but also to reverse the scenario of adolescents sexual abuse.
Porto
S O
SO
Institute of Tropical Medicine and Public Health, School of Medicine, Federal University of Goiás, Brazil.
Cardoso
D D
DD
Queiróz
D A
DA
Rosa
H
H
Andrade
A L
AL
Zicker
F
F
Martelli
C M
CM
D000293:Adolescent; D000328:Adult; D001938:Brazil / Q000453:epidemiology; D002648:Child; D005260:Female; D006509:Hepatitis B / Q000453:epidemiology* / Q000523:psychology / Q000635:transmission; D018453:Homeless Youth / Q000523:psychology; D006801:Humans; D016015:Logistic Models; D008297:Male; D015999:Multivariate Analysis; D015995:Prevalence; D012307:Risk Factors; D016036:Seroepidemiologic Studies; D012725:Sexual Behavior; D012749:Sexually Transmitted Diseases / Q000453:epidemiology / Q000523:psychology / Q000635:transmission