TAILIEUCHUNG - Báo cáo khoa học: "Field Study of Dairy Cows with Reduced Appetite in Early Lactation: Clinical Examinations, Blood and Rumen Fluid Analyses"

Tuyển tập các báo cáo nghiên cứu về bệnh thú y được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành thú y đề tài: Field Study of Dairy Cows with Reduced Appetite in Early Lactation: Clinical Examinations, Blood and Rumen Fluid Analyses. | Acta vet. scand. 2001 42 219-228. Field Study of Dairy Cows with Reduced Appetite in Early Lactation Clinical Examinations Blood and Rumen Fluid Analyses By A. Steen Department of Large Animal Clinical Sciences The Norwegian School of Veterinary Science Oslo Norway. Steen A Field study of dairy cows with reduced appetite in early lactation clinical examinations blood and rumen fluid analyses. Acta vet. scand. 2001 42 219-228. - The study included 125 cows with reduced appetite and with clinical signs interpreted by the owner as indicating bovine ketosis 6 to 75 days postpartum. Almost all of the cows were given concentrates 2 to 3 times daily. With a practitioners view to treatment and prophylaxis the cows were divided into 5 diagnostic groups on the basis of thorough clinical examination milk ketotest decreased protozoal activity and concentrations increased methylene blue reduction time and increased liver parameters ketosis n 32 indigestion n 26 combined ketosis and indigestion n 29 liver disease combined with ketosis indigestion or both n 15 and no specific diagnosis n 17 . Three cows with traumatic reticuloperitonitis and 3 with abomasal displacement were not grouped. Nonparametric methods were used when groups were compared. Aspartate aminotransferase glutamate dehydrogenase gamma-glutamyl transferase and total bilirubin were elevated in the group with liver disease. Free fatty acids were significantly elevated in cows with ketosis compared with cows with indigestion. Activity and concentrations of large and small protozoas were reduced and methylene blue reduction time was increased in cows with indigestion. The rumen fluid pH was the same for groups of cows with and without indigestion. Prolonged reduced appetite before examination could have led to misclassification. Without careful interpretation of the milk ketotest many cases with additional diagnoses would have been reported as primary ketosis. Thorough clinical examination together with feasible rumen

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