许多研究表明除A～G型肝炎病毒外还可能存在其他肝炎病毒。作者采用代表性差异分析法,从一名输血后不明病因肝炎患者的血清中分离到一株新的DNA克隆(N22),并将其命名为TTV。另5名输血后转氨酶升高,但在A～G型肝炎病毒标志物均阴性的病人中,有3名检出了该病毒。作者对5名血清中TTV-DNA阳性和1名阴性的肝病患者同时 Many studies have shown that in addition to hepatitis A ~ G virus may exist other hepatitis viruses. The authors used representative differential analysis to isolate a new DNA clone (N22) from the serum of a patient with unidentified hepatitis after transfusion and named it TTV. Five other transfusions increased transaminases, but three of the patients who tested negative for all hepatitis A to G virus markers detected the virus. The authors tested 5 serum TTV-DNA positive and 1 negative liver disease simultaneously