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Journal of Animal Science, Vol 72, Issue 4 824-827, Copyright © 1994 by American Society of Animal Science

JOURNAL ARTICLE

Incidence of injection-site blemishes in beef top sirloin butts

D. R. Dexter, G. L. Cowman, J. B. Morgan, R. P. Clayton, J. D. Tatum, J. N. Sofos, G. R. Schmidt, R. D. Glock and G. C. Smith
Department of Animal Sciences, College of Veterinary Medicine, Colorado State University, Fort Collins.

The occurrence of damaged muscle tissue resulting from intramuscular injections of animal-health products represents a "quality control" problem and an economic loss to the beef industry. Five individual and sequential national audits of injection-site blemishes in beef top sirloin butts have been conducted at the steak-cutter level. During the most recent audit (March 1993), the incidence of injection-site blemishes in top sirloin butts was determined to be 10.87 +/- 2.99%, with an average weight per blemish of 123.39 +/- 5.48 g. A 5-point classification system used to partition the blemishes into chronological stages of the healing process suggested that the majority of the blemishes originated at the cow-calf or stocker levels, or early in the finishing period. Evaluation of blemish data by geographic location of plant-of-origin suggests that the problem occurs throughout the beef production sector.


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Copyright © 1994 by the American Society of Animal Science.