Patterns of Resistance-associated Substitutions in Patients With Chronic HCV Infection Following Treatment With Direct Acting Antiviral Agents in the Public Health Setting

Successful treatment of hepatitis C has been reported to be associated with 62-84% reduction in all-cause mortality (deaths), 68-79% reduction in risk of HCC and 90% reduction in risk of liver transplantation. The efficacy of NS5A inhibitors for the treatment of patients chronically infected with hepatitis C virus (HCV) can be affected by the presence of NS5A resistance-associated substitutions (RASs). Pre-existence of resistance associated substitutions (RASs) to direct antiviral agents (DAAs) reduces sustained virologic response (SVR) rates by 3-53% in hepatitis C virus (HCV) genotype 3 infected patients depending on different predictors and the DAA regimen used. This study will prospectively analyze data from the MukhMantri Punjab Hepatitis C Relief Fund (MMPHCRF) to determine the posttreatment prevalence of various NS5A RASs, and their effect on outcomes of treatment with daclatasvir-sofosbuvir or sofosbuvir-ledipasvirin patients with chronic HCV.

The study aims to assess the prevalence and effect of RASs on sustained virological response (SVR) rates in patients with treatment failure to a regimen containing sofosbuvir and ledipasvir/daclatasvir.