J. Anim Sci.
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J. Anim Sci. 1958. 17:752-757.
© 1958 American Society of Animal Science
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Reproductive Performance of Swine Fed Chlortetracycline Over Several Generations

R. F. Sewell and J. L. Carmon1

University of Georgia,,2 Athens

Abstract

Feeding the antibiotic chlortetracycline to sows continuously throughout the gestation-lactation cycle for three generations resulted in an increase in the percentage of live pigs born and an increase in the percentage weaned of the live pigs farrowed. No difference was found in total litter1 size, birth weights, 21-day weights or weaning weights.

Footnotes

1 The authors are grateful to the American Cyanamid Co., Pearl River, New York, for supplying the vitamin and antibiotic supplements used in this experiment. Acknowledgment is also due A. M. Lynn, J. R. Danion and B. B. Gray for assistance in caring for the animals.

2 Contribution from the Department of Animal Husbandry. Journal Paper No. 61 of the College Experiment Station.






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Copyright © 1958 by the American Society of Animal Science.