根据大量资料显示 ,丙型肝炎 (HC)呈世界性分布 ,丙型肝炎病毒 (HCV)基因型有着明显的地理分布特征。我国和日本的 HCV株之间存在有较大的同源性 ,但均以 型为主 ,亚型有待进一步研究。HCV感染症状轻微不易发现 ,约 6 0 %以上转为慢性 ,10 %～ 2 0 %形成肝硬化 ,2 0 %发展为肝 According to a large amount of data, hepatitis C (HC) is globally distributed, and the genotype of hepatitis C virus (HCV) has obvious geographical distribution. There is a large homology between HCV strains in China and Japan, but all of them are type-based. Subtypes are for further study. The symptoms of HCV infection are slightly difficult to detect, about 60% to chronic, 10% ~ 20% to cirrhosis, and 20% to liver