Abstract
Hepatitis C virus (HCV) infection is one of the main reasons causing liver cirrhosis and hepatocellular carcinoma. The quasispecies composition and the evolution of HCV are very complicated. An in-depth analysis of the quasispecies composition of HCV is critical for elucidating the mechanisms of HCV transmission. The regions encoding the envelope glycoproteins (E1 and E2) and the nonstructural protein 2 (NS2) are hyper variable regions (HVR). Analyzing the quasispecies of HCV HVR with advanced sequencing and bio-information technologies would be beneficial for understanding the sources of HCV infection, the routes of transmission and the evolution of HCV. Currently, three generations of sequencing methods and some bio-information soft-wares are available for analyzing HCV HVR quasispecies. When an outbreak of HCV infection happens, using the new generation of sequencing and bio-information methods to seek the first case and the routes of transmission would provide scientific basis for the prevention and treatment of HCV infection. Key words: Hepatitis C Virus; Transmission; Quasispecies; Hypervariable region; Molecular epidemiology
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