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用组织培养分离的戊型肝炎病毒（ＨＥＶ）８７Ａ株病毒液，以后腿静脉内接种４只恒河猴，其中２只在感染后第５周血清转氨酶（ＡＬＴ）开始升高，最高值达到感染前猴的将近２倍，升高后肝活检可见特征性病理学改变，并从混合粪便悬液中又分离出相同的病毒；感染的动物ＨＥＶ特异性抗体全部转阳。而２只对照猴无上述感染症状。表明８７Ａ株是一种嗜肝病毒
Twenty-five Rhesus monkeys were inoculated intravenously with the isolated hepatitis A virus (HEV) strain 87A and two of them were raised at the fifth week post-infection with elevated serum aminotransferase (ALT) Nearly 2 times the former monkey, elevated liver biopsy shows characteristic pathological changes, and separated from the mixed fecal suspension and the same virus; infected animals all the HEV specific antibodies turn positive. The two control monkeys without the above symptoms of infection. The 87A strain is a hepadnavirus