Comparison of enzyme immunoassay with radioimmunoassay for the detection of antibody to hepatitis B core antigen as the only marker of hepatitis B infection in a population with a high prevalence of hepatitis B.
1990
Enzyme immunoassay (EIA) and radioimmunoassay (RIA) for the detection of antibody to hepatitis B core antigen (anti-HBc) were compared using serum specimens from Alaska Natives screened during a hepatitis B control program that were initially positive by EIA for only anti-HBc. Of 36 specimens from persons previously HBsAg positive but who were now only anti-HBc positive by EIA, 94.4% were anti-HBc positive by both assays, with anti-HBc levels exceeding 93% inhibition. Low-level antibody to hepatitis B surface antigen (anti-HBs) ( 70% inhibition the anti-HBc was a reproducible finding frequently accompanied by either low-level anti-HBs or anti-HBe.
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