[A retrospective examination of a hepatitis focus in plasma donors]

Data are presented on the retrospective epidemiological serological investigation of episodes of hepatitis-like diseases among plasma donors in Krasnoyarsk. A mixed structure of the focus was established with prevalence of B- and non-A-, non-B hepatitides. Markers of recent infection with HB virus were recorded in 43.6% of sick donors, at the same time no donors had IgM antibodies to hepatitis A evidencing the acute stage or early convalescence. The use of the insufficiently sensitive passive hemagglutination test for HBsAg identification has resulted in incomplete detection of donors-carriers of HB virus.