title: The enzyme-linked immunosorbent assay (ELISA) as a serological test for detecting antibodies against Leptospira interrogans serovar hardjo in sheep.
abstract: The enzyme-liked immunosorbent assay (ELISA) was compared with the standard microscopic agglutination test (MAT) as a method for detecting antibodies against Leptospira interrogans serovar hardjo in sheep. Peak antibody levels detected by the 2 tests occurred at different times following experimental infection of sheep. In serums from flocks of sheep with naturally acquired infection there was a 95% correlation between MAT and ELISA with respect to the presence or absence of antibody to serovar hardjo, although the levels of correlation of the titres of the 2 tests was low. The 2 tests appeared to measure different antigen-antibody systems. The ELISA would be a useful test for screening large numbers of serums for antibodies to L. interrogans serovar hardjo.
mesh_terms: D000372:Agglutination Tests / Q000662:veterinary; D000818:Animals; D000907:Antibodies, Bacterial / Q000032:analysis*; D004797:Enzyme-Linked Immunosorbent Assay; D007124:Immunoenzyme Techniques; D007921:Leptospira interrogans / Q000276:immunology*; D007922:Leptospirosis / Q000175:diagnosis / Q000662:veterinary*; D012756:Sheep; D012757:Sheep Diseases / Q000175:diagnosis*
chemical_list: D000907:Antibodies, Bacterial