The article presents information on the relevance of the bovine genital campylobacteriosis problem and, in particular, its serological diagnosis. The results of determining the activity and specificity of the developed campylobacter antigens in the cold complement fixation test (cCFT) with commercial serum (Virion\Serion), as well as with a panel of homo- and heterologous sera are presented. The results of the analysis of the epizootic situation regarding campylobacteriosis among farm animals in Ukraine for 2019–2020 are shown. Serological monitoring for campylobacteriosis using cCFT was conducted in 22 farms from 9 regions of Ukraine. A total of 727 blood serum samples from cattle and sheep were examined. The overall prevalence of positive animals was 5.7% and 12.9% among cattle and sheep, respectively. These results indicate the circulation of Campylobacter fetus subspecies venerealis and subspecies fetus among cattle and sheep, which can cause significant economic losses in farms
Keywords: epizootic situation, cattle, sheep
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