To investigate the clinical features and treatment response in patients with hepatitis B (HBV) and hepatitis C virus (HCV) co-infection receiving anti-HCV therapy.

Patients with HBV/HCV co-infection, who were eligible for anti-HCV therapy, were included in the study. Patients had detectable HBsAg for at least 6months and detectable HCV-RNA before the initiation of therapy. Primary end-point was the proportion of patients achieving sustained virological response (SVR). HBV serology and HBV-DNA results obtained during the follow-up were assessed to determine HBV clearance or reactivation after anti-HCV therapy.

There were 612 patients in the HCV cohort and 52 (8.5%) of them were HBV/HCV co-infected. Twenty-eight patients (20 male, mean age: 47±12) received anti-HCV treatment and followed-up for a mean duration of 53months (12–156). Fifteen patients received peginterferon/ribavirin combination while the remaining patients received standard interferon/ribavirin combination (n=6) or standard interferon monotherapy (n=7). Patients receiving interferon monotherapy were under chronic hemodialysis therapy. SVR was achieved in 14 (50%) patients at the end of follow-up. The proportion of patients with SVR in three treatment arms were not significantly different (P=0.78). Eight of 11 patients with detectable HBV-DNA cleared HBV-DNA during treatment. Seven (25%) patients experienced a rebound in HBV-DNA, and one patient experienced an acute hepatitis flare which was controlled by tenofovir therapy. Two (7%) patients cleared HBsAg and one of them was seroconverted to anti-HBs.

Co-infection with HBV does not have a negative impact on the efficacy of anti-HCV treatment, but HBV-DNA should be monitored to overcome the risk of HBV exacerbation.