Key words: infections diseases, urogenital chlamydiosis, chlamydiosis artritis, serological diagnostics, specific prophylaxis, efficiency, measures on prophylaxis and eradication.of investigation were cattle of differents farms of the Republic of the Belarus.of investigation : pathological material, blood, serum of blood, were veterinary reports and accounts.goal perfectly methods diagnostic, common and specific prophylaxis of cattle chlamydiosis.the researches epizootological, clinical, pathological, microscopological, bacteriological, virusological, serological methods as well as accounts on the disease were used.of cattle chlamydiosis on the areas of the Republic of Belarus has been determined as well as epizootological situation of the this disease have been discovered. clinical develop urogenital chlamydiosis and chlamydiosis artritis.serological diagnostic technigues with the RNSK and for disease implement comparison efficiency apply vaccine by chlamydiosis bovine of the Republic of Belarus. The economic and epizootic efficiency of its application has been established.scheme instruction on prophylaxis and eradication chlamydiosis animals.results of the investigation are being used in training, scientific explorations and have been recommended for veterinary practice. br/>
