| delta agent infection in riyadh, saudi arabia. | blood samples from 186 hbsag-positive saudis and 42 hbsag-positive philippino blood donors were tested for anti-delta using the radioimmunoassay technique. the high prevalence of anti-delta in saudis with liver disease (32%) contrasted sharply with that in saudis with illness other than liver disease (13%) and in apparently healthy saudis (5.4%). together with the high prevalence of anti-delta in philippino blood donors (9.5%), these results suggest that foci of endemic delta infection other tha ... | 1987 | 3617196 |