brucellosis diagnosis by PCR test brucellosis diagnosis using PCR assay for detecting Brucella omp-2 brucellosis diagnosis made based on the PCR assay that is detecting the Brucella omp-2 gene. All the sequence data of primers and PCR product are parts of the genome sequence data from either B. abortus or B. melitensis, suggesting that the test can detect both of these species {Leal-Klevezas, 1995}. YL