| seroepidemiology of infection with hepatitis a virus and hepatitis b virus in the seychelles. | a batch of 417 serum samples obtained from native-born subjects were tested for the presence of hepatitis b surface antigen (hbsag) and corresponding antibody (anti-hbs), by enzyme-linked immunosorbent assay (elisa); and antibodies to hepatitis b core antigen (anti-hbc), e-antigen (anti-hbe), and hepatitis a virus (anti-hav), by radioimmunoassay (ria). hbsag was found in only two of the 417 subjects studied. anti-hbs was detected in 112 samples (26.8%), anti-hbc in 114 (27.3%) and anti-hbe in 31 ... | 1982 | 6285695 |