RESUMO
Hepatitis C virus [HCV] causes 308000 deaths due to liver cancer and758000 deaths due to cirrhosis every year. Almost 170 million peoplehave HCV infection around the world. Information regarding this virushelps us to determine the prevalence of other hepatitis C genotypes inpopulation, especially in intravenous drug users. It is assumed that somegenotypes are more common in certain areas or groups of people. A recentstudy strongly confirms the central role of injecting network traits, notonly as a transmission factor but also as a predictor of HCV genotypeand phylogenetic determination in different communities. Hepatitis Cgenotypes and subtypes have different prevalence considering the country.Risk factors such as transfusion, hemodialysis, root of acquisition andetc, are detected in intravenous drug users. Several conducted studieshave investigated the prevalence, risk factors, and predominance of HCVgenotypes infection in different parts of Iran