Use of bovine somatotropin at the time of surgery for left displacement of the abomasum in dairy cows. Minnesota Dairy Practitioners Study Group |
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Authors: | Fetrow J P Pankowski J W Vicini J L Ames T R |
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Affiliation: | Department of Clinical and Population Sciences, College of Veterinary Medicine, University of Minnesota, St Paul 55082, USA. |
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Abstract: | OBJECTIVE: To evaluate the effect of a single dose of recombinant bovine somatotropin (bST) on certain metabolic values, health, and milk production of dairy cows undergoing surgery for left displacement of the abomasum. DESIGN: Blinded clinical trial. ANIMALS: 413 cows with left displacement of the abomasum. PROCEDURE: A single 500-mg dose of bST was administered to dairy cows following surgery in field practice conditions for left displacement of the abomasum. A placebo of the same carrier without bST was administered to control cows in this blinded study. Metabolic and production responses in a short-term follow-up period were measured. RESULTS: Blood glucose concentrations in cows 3 to 5 days after surgery were statistically higher for treated cows than for control cows. A higher proportion of treated cows had improved urine ketone test results than did controls. Significant differences in other metabolic values, health, and milk production were not detected. CLINICAL IMPLICATIONS: Treatment of metabolically compromised cows with bST may have some positive effects, but further investigation is needed to confirm therapeutic value. |
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