... alfa and ribavirin therapy and the HCV genotype should be systematically determined before treatment, as it determines the indication, the duration of treatment, the dose of ribavirin and the ... (A), genotypes 2 and 3 (B), and genotypes 4, 5 and 6 (C). Int. J. Med. Sci. 2006, 3 37 Chronic hepatitis C In patients with clinical or biological signs of chronic liver disease, chronic ... detection of 50 IU/ml or less 24 weeks after the end of treatment [18]. Initiation of therapy Only patients with detectable HCV RNA should be considered for pegylated IFN alfa and ribavirin combination...