Serological studies on brucella in dakhalia and damieta governorates

A total of 665 blood. samples were first screened for Brucella antibodies by using Rose Bengal Plate test The positive reactors were futther confirmed by tube agglutination test Results of the examined dairy cattle sera revealed that the tncidence of brucellosis was 29.17%. A toial of 320 milk samples were also screened and the results revealed that 102 (31.9%) were positive after tested by MPT 1n corresponding, milk whey samples were tested by whey serological tests (wRBPT and wTAT. wRBPT recorded 52 positive samples (16.3%) and wTAT recorded 42 (13.1%). MRT was taken as a reference standard test for evaluating wRBPfT and wTAT. The sensitivity was (50.9%) and (41.196) for wRBPT and wTAT respectively while the specifkity was (100%) for each and the agreement was 84.4% and 81.3% respectively, On the other hand, the results showed the disagreement between serum and wiley serological tests and the relative agreement between MRT and serum agglutination tests, Moreover. examination of 100 marketing milk samples was found to be negative to MRT.