| high hbsag and anti-delta carrier rate among asymptomatic africans living on the campus of the university of niamey, niger. | in 1984 and 1985, a non-random survey was conducted among healthy africans living on the campus of the university of niamey, niger. of 238 asymptomatic subjects, 17.6% carried hepatitis b surface antigen (hbsag) in their serum, while 50.8% demonstrated protective anti-hbs antibodies. antibodies to delta virus were detected in 29.3% of hbsag-positive sera. this suggests that hepatitis b virus (hbv) and hepatitis delta virus (hdv) are common in niger, and the factors that increase the likelihood o ... | 1987 | 3503422 |