ВОПРОСЫ НОРМАТИВНО-ПРАВОВОГО РЕГУЛИРОВАНИЯ В ВЕТЕРИНАРИИ мость проведения регулярной экспресс-диагностики, определения вида возбудителя и его чувствительности к антимикробным средствам. <...> Изоляция энтеробактерий в 100% проб с титром от 10-3 до 10-5 от животных с длительным течением (более двух недель) скрытого воспаления - о необходимости не только своевременного лечения, но и необходимости применения средств повышающих общую и локальную резистентность. <...> SUMMARY Russian science and practice achieved definite success in solving mastitis problem in animals. <...> And with it, in spite of the existing achievements, the problem of mastitis continues to remain one of the most actual for veterinary science and practice. <...> Currently, not all the causes, bringing on inflammatory diseases of the udder, are known. <...> Often it is difficult to diagnose what has the main significance in the etiology of mastitis: proximate causes (infectious agent) or predisposing factors. <...> The aim of the researches was to study pathogenic and opportunistic pathogenic microflora in mastitis etiology in cows. <...> The research material was udder secreta from clinically healthy cows, cows with udder irritation and cows with mastitis. <...> We detected the high contamination level of milk of the cows with udder, irritated by pathogenic and opportunistic pathogenic microflora, that indicated the necessity of regular control of such animals’ level in the herd and timely veterinary-sanitary and technological measures, directed at the decrease of their number in the herd. <...> The discharge of pathogenic microflora from udder secreta of the cows with subclinical mastitis in 80-100% of the cases determines the necessity to provide regular express diagnosis, detection of the type of causative agent, its sensitivity to antimicrobials and appropriate treatment. <...> Васильев В.Г <...>