title: Echinococcus granulosus: additional studies on selected sera from seronegative patients with hydatidosis.
abstract: Human hydatidosis-positive sera, which resulted negative in serological tests but positive on surgery, were examined with I.H.A. and E.L.I.S.A. techniques using a standardized antigen and a new antigen (the 0.8 M antigen) from sheep hydatid fluid. The present study demonstrated that the 0.8 M antigen was the most effective, and that sensitivity of any given antigen depends upon the method adopted.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000906:Antibodies / Q000032:analysis*; D000941:Antigens / Q000276:immunology; D002648:Child; D002675:Child, Preschool; D004443:Echinococcosis / Q000175:diagnosis*; D004444:Echinococcosis, Hepatic / Q000175:diagnosis; D004445:Echinococcosis, Pulmonary / Q000175:diagnosis; D004446:Echinococcus / Q000276:immunology*; D004797:Enzyme-Linked Immunosorbent Assay; D005188:False Negative Reactions; D005260:Female; D006386:Hemagglutination Tests; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis; D008297:Male; D008875:Middle Aged; D013158:Splenic Diseases / Q000175:diagnosis
chemical_list: D000906:Antibodies; D000941:Antigens; D007136:Immunoglobulins