ВЫВОДЫ В результате проведенных исследований установлено, что 30-секундное апноэ и H2O2индуцированная бронхоконстрикция, но не пальпация последнего кольца трахеи, позволяют проводить диагностику бронхита за 6-12 суток до развития его симптомокомплекса. <...> Пальпация последнего трахеального кольца эффективна для ранней диагностики трахеобронхита. <...> Кашель при пальпации средней и верхней трети трахеи появляется на поздних стадиях трахеита и трахеобронхита. <...> Определение чувствительности последнего кольца трахеи методом пальпации и 30 с апноэ позволяют проводить дифференциальную диагностику ранних проявлений бронхита и трахеобронхита у телят. <...> Induced cough in the early diagnosis of inflammatory respiratory diseases in calves. <...> SUMMARY Cough is considered as one of the main respiratory symptoms, according to his strength, character, frequency, and duration of pain, the features of the pathological process, its localization in the respiratory organs and course of the disease can be defined. <...> The purpose of this research is to conduct a comparative evaluation of the effectiveness of different cough induction methods for early diagnosis of airways inflammation in calves. <...> Investigations were carried out on 60 red-motley calves of 7-14 days age. <...> For artificial cough simulation animals were injected intravenously with 0.6% hydrogen peroxide solution of 0.9% sodium chloride solution at a dose of 0.4 ml per kg body weight, then palpation of last ring of trachea and 30-second apnea was used. <...> It was found out that for 6-12 days prior to development of bronchitis syndrome cough in calves was caused by a 30-second apnea and H2O2-induced bronchoconstriction, but not a palpation of the last ring of trachea. <...> Palpation of the last tracheal ring is effective only for early diagnostics of tracheobronchitis. <...> Cough on palpation of middle and upper <...>