Ðåçþìå. Áîëåçíè ìîëîäíÿêà ñåëüñêîõîçÿéñòâåííûõ aeèâîòíûõ íàíîñÿò çíà÷èòåëüíûé ýêîíîìè÷åñêèé óùåðá aeèâîòíîâîäñòâó íàøåé ñòðàíû, êîòîðûé ñêëàäûâàåòñÿ èç ïîòåðü ìîëîäíÿêà, ñíèaeåíèÿ ïðèâåñîâ, çíà÷èòåëüíûõ çàòðàò íà ëå÷åáíûå è ïðîôèëàêòè÷åñêèå ìåðîïðèÿòèÿ. AEåëó-äî÷íî-êèøå÷íûå áîëåçíè òåëÿò ðåãèñòðèðóþòñÿ âî âñåõ õîçÿéñòâàõ Âîëîãîäñêîé îáëàñòè. Çàáîëåâàåìîñòü òåëÿò â ñðåäíåì ñîñòàâëÿåò 45,5 % îò ðîäèâøåãîñÿ ìîëîäíÿêà êðóïíîãî ðîãàòîãî ñêîòà, à ëåòàëüíîñòü-5,6 %.  îñíîâíîì ïàäåae íàáëþäàåòñÿ ñðåäè íîâîðîaeäåííûõ aeèâîòíûõ. Èç ïàòîëîãè÷åñêîãî ìàòåðèàëà, âçÿòîãî îò òåëÿò, âûäåëåíèå áàêòåðèé ôèêñèðîâàëè â 136,0 %.  ìîíîâàðèàíòå âûäåëåííûå áàêòåðèè âñòðå÷àëèñü â 59,1 % ñëó÷àåâ, à â àññîöèàöèè ñ äðóãèìè ìèêðîîðãàíèçìàìè-â 40,9 % ñëó÷àåâ. Âèäîâîé ñîñòàâ àññîöèàöèé áûë äîñòàòî÷íî ðàçíîîáðàçåí è ïðåäñòàâëåí ñëåäóþùèìè êîìáèíàöèÿìè ìèêðîîðãàíèçìîâ: â àññîöèàöèÿõ ÷àùå âñåãî âûäåëÿëèñü Ãðàì+ ïàëî÷êè (69,8 %), Pasteurella è Ãðàì+ ïàëî÷êè (16,3 %), Ãðàì+ ïàëî÷êè è Streptococcus (9,3 %), Pasteurella è Streptococcus (4,7 %). Âñå âîçáóäèòåëè âèðóñíûõ àíòèãåíîâ áûëè âûäåëåíû â àññîöèàöèÿõ: êîðîíàâèðóñ è âèðóñíàÿ äèàðåÿ (43,0 %), êîðîíàâèðóñ è ðîòàâèðóñ (36,0 %), êîðîíàâèðóñ, ðîòàâèðóñ è âèðóñíàÿ äèàðåÿ (21,0 %). Âîçáóäèòåëè ðîòàâèðóñíîãî ýíòåðèòà è âèðóñíîé äèàðåè áûëè âûÿâëåíû êàê íà íåáîëüøèõ ôåðìàõ, òàê è íà êîìïëåêñàõ. Ñàìûé âûñîêèé ïðîöåíò âûäåëåíèÿ áûë ó êîðîíàâèðóñà-50,0 % ïðîá, ðîòàâèðóñà-21,0 %, à âîçáóäèòåëü âèðóñíîé äèàðåè-29,0 % ïðîá. Ãåíîì ãåðïåñâèðóñà ïÿòîãî òèïà âûÿâëåí â 37,0 % ïðîá ìåòîäîì ÏÖÐ. Summary. Diseases of young farm animals cause significant economic damage to livestock of our country, which consists of the loss of young animals, reducing weight gain, significant costs for medical and preventive measures. Gastrointestinal diseases of calves are registered in all farms of the Vologda oblast. The incidence of calves is on average 45,5% of the born young cattle, and mortality-5,6%. In General, mortality is observed among newborn animals. From the pathological material