| Effect of a nutritional reconditioning program for thin dairy cattle on body weight, carcass quality, and fecal pathogen shedding. | |
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MedLine Citation:
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PMID: 22129125 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Objective-To assess changes in body weight, carcass quality, and fecal pathogen shedding in cull dairy cows fed a high-energy ration for 28 or 56 days prior to slaughter. Design-Randomized clinical trial. Animals-31 adult Holstein dairy cows. Procedures-Cows were randomly assigned to a control (immediate slaughter) group or a 28-day or 56-day feeding group. Cows in the feeding groups received a high-energy feed and were weighed every 7 days. Carcasses were evaluated by USDA employees. Fecal and blood samples were collected at the start and end of the feeding periods. Results-Body condition score and adjusted preliminary yield grade were significantly increased in both feeding groups, compared with values for the control group; body weight, hot carcass weight, dressing percentage, and ribeye area were significantly increased after 56 days, but not after 28 days, compared with values for the control group. Average daily gain and marbling score were significantly lower after feeding for 28 days versus after 56 days. Prevalence of Escherichia coli O157:H7 shedding in feces decreased from 14% to 5.6%, but this difference was not significant. Cows seropositive for antibodies against bovine leukemia virus that had signs of lymphoma and lame cows had a low average daily gain. Net loss was $71.32/cow and $112.80/cow for the 28-day and 56-day feeding groups, respectively. Conclusions and Clinical Relevance-Feeding market dairy cows improved body condition and carcass quality. Cows seropositive for antibodies against bovine leukemia virus that have signs of lymphoma and lame cows might be poor candidates for reconditioning. |
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Authors:
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Gabriele U Maier; Bruce R Hoar; Carolyn L Stull; Philip H Kass; Veronica Villanueva; John Maas |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of the American Veterinary Medical Association Volume: 239 ISSN: 1943-569X ISO Abbreviation: J. Am. Vet. Med. Assoc. Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-01 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503067 Medline TA: J Am Vet Med Assoc Country: United States |
Other Details:
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Languages: eng Pagination: 1594-602 Citation Subset: IM |
Affiliation:
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Departments of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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