Hepatitis C virus genotype 4: Genotype 1's little brother.

Treatment for hepatitis C virus genotype 4 infection has undergone a major advance over the past 5 years with the emergence of direct-acting antiviral agents. Previously, genotype 4 treatment had been limited to the combination of pegylated interferon and ribavirin, with low rates of sustained virological response. The combinations of new direct-acting agents have resulted in a radical improvement in hepatitis C therapy. Much of the currently available efficacy and safety information in the treatment of genotype 4 has been extrapolated through the results of genotype 1. In this report, we review the efficacy and safety data obtained in recent studies focusing on genotype 4 patients, including special populations, such as those with decompensated cirrhosis.