Abstract
The results of comprehensive researches in cattle-breeding farms of Ukraine to determine the epizootic situation of bovine tuberculosis are presented. It is proved that the application of the proposed complex of research methods allows to find out the causes of non-specific allergic reactions to tuberculin in animals with minimal economic losses for agricultural enterprises. It has been established that parallergic reactions to tuberculin in cattle are caused by such mycobacterial species as M. phlei, M. smegmatis, M. nonchromogenicum, and pseudoallergic reactions are caused by nocardia and actinomycetes. The presence of non-specific animal reactions is not a reason to consider animal groups unfavorable for tuberculosis. However, special monitoring for this disease is needed
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