Agglutination tests and their modifications in the diagnosis of bovine brucellosis.

This article reviews the effects of using Yersinia enterocolitica serotype: 09 somatic antigen in diagnostic tests for brucellosis. The tests employed include the standard tube agglutination test, the microplate agglutination test, the quantitative plate agglutination test, the growth agglutination test and the indirect hemagglutination technique. Only the growth agglutination technique demonstrated an increased sensitivity over the STAT. Neither the microplate agglutination test nor quantitative plate tests offered any significant advantages over the STAT. The QPAT using Brucella O antigen was clearly subject to false negative results. The indirect hemagglutination technique showed extreme variation in results, the significance of which (if any) was unclear.