| delta infection in eastern sicily. | sera from 619 hbsag+ subjects living in eastern sicily, consecutively collected from 1975-1985, were tested for markers of delta virus (hdv) infection: delta antigen (hdag), antibodies to delta (anti-hdig), and also for antibodies to hbcore of igm type (anti-hbcigm) and for the system hbe-anti-hbe. the subjects included 210 asymptomatic carriers, 238 patients with acute hepatitis and 171 patients with chronic liver disease. hdag was not found in any of the samples. anti-hd was found in 28/171 (1 ... | 1987 | 3691748 |