实验证明 ,HCV感染后 ,即可表现为急性肝炎 ,也可表现为慢性携带状态 ,慢性迁延性肝炎 ,慢性活动性肝炎和肝硬变 ,甚至肝癌。对这种临床表现复杂 ,慢性化倾向高 ,中和抗体水平低或不产生 ,并与原发性肝癌有较为密切关系的疾病 ,发病机制的研究应引起重视。1　直接致病作用丙肝? Experiments show that, after HCV infection, can be manifested as acute hepatitis can also be manifested as chronic carrying status, chronic persistent hepatitis, chronic active hepatitis and cirrhosis, and even liver cancer. This complex clinical manifestations, high tendency to chronic, low or no neutralizing antibody levels, and with primary liver cancer are more closely related to the disease, the pathogenesis of research should pay attention. A direct pathogenic role of hepatitis C?