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Background  Hepatitis B virus (HBV) and hepatitis C virus (HCV) are a common cause of complications in liver disease and immunological impairment among human immunodeficiency virus (HIV)-infected patients. The aim of this study was to assess the seroprevalence of HBV and HCV and their correlation with CD4+ T-cells among HIV-infected patients in an HBV endemic area.    Methods  A cross-sectional observational and retrospective study was carried out in a reference center in Southern Brazil between January 2005 and December 2016. Socio-demographic data were collected by using a structured questionnaire. Serological tests and analysis of CD4+ T-cell count levels were performed using standard procedures.    Results  The seroprevalence of HIV-HBV, HIV-HCV, and HIV-HBV-HCV coinfections was 3.10%, 3.10%, and 0.16%, respectively. At baseline, anti-hepatitis B surface and anti-hepatitis B core antigens were detected in 46.27% and 16.74% of HIV-monoinfected patients and in 31.25% and 21.86% of the HIV-HCV coinfected patients, respectively. The median CD4+ T-cell count at baseline in the HIV-monoinfected group was higher than that in the HIV-coinfected groups, but without statistical significance. The median CD4+ T-cell count and the CD4/CD8 ratio were significantly higher in HIV-HBV and HIV-HCV groups after 24 months of combination antiretroviral therapy (cART) compared to the pre-cART values. When comparing patients with HIV-HBV and HIV-HCV on cART, CD4+ T-cell recovery was more rapid for HIV-HBV patients.    Conclusion  Although the analyzed region was endemic for HBV, the prevalence of HIV-HBV and HIV-HCV coinfection was lower than the rate found in the general population of Brazil. HBV and HCV had no significant impact on CD4+ T-cell counts among HIV-infected patients at baseline.

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Seroprevalence of hepatitis B virus (HBV) and hepatitis C virus (HCV) among human immunodeficiency virus (HIV)-infected patients in an HBV endemic area in Brazil