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Fifty one cases of post-operative or post-transfusion non-A, non-B hepatitis were devided into 2 groups according to their incubations; the short incubation type and the long incubation type. Most cases of epidemically observed patients and all cases without blood transfusion showed incubation period shorter than 4 weeks. On the other hand, most cases of posttransfusion without relationship to opertion and a few cases of epidemically observed patients showed incubation period longer than 5 weeks. In the short incubation type, acute illness was severer, but long-term prognosis was better than that in the cases of the long incubation type. In the short incubation type, hepatocellular necrosis was mainly found in the periportal area, while in the long incubation type, it was found in the centrolobular area. Thes results suggest that the short incubation type resembling type A hepatitis might be caused by a different type of virus from the type of virus causing the long incubation type resembling type B hepatitis.
財団法人日本消化器病学会の論文