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由于丙型肝炎病毒和戊型肝炎病毒检测的免疫学和分子生物学方法的建立，使大部分非甲、非乙型肝炎得以诊断，但仍有一部分肝炎病人的病原体无法查明。美国有5．0％～10．O％的急性暴发型肝炎和ZO．0％～25．0％的慢性肝炎不能进行病原学诊断［’j；在我国的输血后肝炎中除外乙
Due to the establishment of immunological and molecular biological tests for the detection of hepatitis C and hepatitis E virus, the majority of non-A and non-B hepatitis can be diagnosed. However, some hepatitis pathogens still can not be identified. The United States has 5.0% ~ 10. O% of acute fulminant hepatitis and ZO. 0% ~ 25.0% of chronic hepatitis can not be pathogenic diagnosis [’j; in China after transfusion of blood except hepatitis B