Prevalence of hepatitis B co-infection among HIV positive patients: Narrative review article

Background: hepatitis b virus (hbv) is the most prevalent viral infection and is among the leading causes of human liver diseases. nearly 360 millions of people are world widely infected with prolonged forms of hepatitis b including active and inactive chronic forms. chronic hepatitis b (chb) is associated with cirrhosis and hepatocellular carcinoma (hcc) in patients suffering from congenital and/or acquired immunodeficiency and also following immunosuppres-sive therapy. the target cell of human acquired immunodeficiency virus (hiv) is cd4 positive t cells. these cells play central role(s) in both cellular and humoral immunity so that the hiv attack of cd4 positive t cells causes suppres-sion of both cell-mediated and humoral immune responses. one of the frequent complications in hiv positive pa-tients is hbv co-infection and as a result,the co-transmission of these viral diseases is common. due to the para-mount importance of the co-infection of hbv and hiv,it is noteworthy to investigate the prevalence of hepatitis b in these patients for planning of an effective therapeutic strategy. based on these considerations,the main aim of this review article was to collect and analyze the recent and relevant studies regarding the prevalence rate of hepatitis b co-infection among hiv positive patients world widely.