title: Analysis and comparison of two methods to detect hepatitis B antigen. Counterelectrophoresis (CEP) and reversed passive latex-agglutination (RPLA) technic in relationship to radioimmunoassay.
abstract: The authors evaluated two methods for detection of hepatitis B surface antigen, reversed passive latex agglutination and counterelectrophoresis, using radioimmunoassay as a control. The RPLA test (Antigen I, Pfizer Inc., Lot no. 403-94301-1) was compared with radioimmunoassay (RIA, Austria) and counterelectrophoresis (CEP) using serum specimens obtained at the Mount Sinai Medical Center, Miami Beach, Florida. Of the 100 selected sera tested as unknowns, 64 were positive by RIA and 36 were negative. The RPLA test yielded results comparable to those of the RIA technic in that the same 64 positives and 36 negatives identified by RIA were obtained with the RPLA test. Of the 64 positive samples obtained with the RIA technic, five yielded negative results with the CEP method. The RPLA test proved to be more sensitive than CEP in this survey.
mesh_terms: D003378:Counterimmunoelectrophoresis; D006511:Hepatitis B Antigens / Q000032:analysis*; D006801:Humans; D007122:Immunoelectrophoresis; D007841:Latex Fixation Tests; D011863:Radioimmunoassay
chemical_list: D006511:Hepatitis B Antigens