| [hiv and hepatitis b virus co-infection: prevalence and risk factors]. | the objective of this study was to assess the prevalence of hepatitis b virus and possible risk factors for this disease in 401 patients infected with the human immunodeficiency virus, followed at the university hospital of the ribeirão preto medical school, são paulo state university. each participant was submitted to a specific questionnaire and had a blood sample tested for the serologic markers hbsag, total anti-hbcag, anti-hbsag and anti-hcv, using elisa technique. the overall prevalence of ... | 2004 | 15361955 |