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[Epidemiological results in recovered cases of viral hepatitis at the Infectious Disease Clinic of the University of Perugia from 1971 to 1978].

A retrospective epidemiological survey on patients admitted for hepatitis to the Infectious Disease Institute of Perugia University was undertaken. 255 out of 610 patients, examined during the 1971-1978 period, had type B hepatitis. The incidence of post transfusional hepatitis was 15.7%, while the disease showed significant increase in drug addict patients and in hospital staff. HBsAg was positive in 40 of 94 patients (43.7%) with post-transfusional hepatitis.