随着检测甲、乙、丙、丁、戊型肝炎病毒的免疫学和分子生物学方法的建立，使大部分肝炎病人得以分型诊断。但仍有一部分散发性或输血后肝炎病人的病原体无法查明。近年以美国Abbott公司和Genelabs为首的2个独立的研究小组相继成功分离出一种新的肝炎病毒”，”，命名为庚型肝炎 With the establishment of immunological and molecular biological tests to detect A, B, C, D and E viruses, most patients with hepatitis have been diagnosed by typing. However, some sporadic or post-transfusion hepatitis pathogens remain undetected. In recent years, two independent research groups led by Abbott Corporation and Genelabs successfully isolated a new hepatitis virus “,” named as Hepatitis G