J. Anim Sci.
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J. Anim Sci. 1962. 21:207-209.
© 1962 American Society of Animal Science
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Effect of Feeding Therapeutic Level of Antibiotic at Breeding on Reproductive Performance of Swine1

B. T. Dean2 and L. F. Tribble

University of Missouri, Columbia

Abstract

Feeding an antibiotic (tetracycline), at a therapeutic level (0.54 gm. per head per day) for a 10-day to 3-week period beginning 0 to 7 days prior to the start of the breeding season, resulted in a significant increase in the size of the litter farrowed.

Antibiotic treated sows and gilts farrowed litters averaging 18.3% larger, and weaned 29.3% larger litters than controls. In addition, 9.3% more of the pigs farrowed were alive at birth.

Footnotes

1 Journal of Series paper No. 2350 approved by the Director of the Missouri Agricultural Experiment Station.

2 Present address: Agriculture Extension Service, University of Hawaii, Honolulu, Hawaii.






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Copyright © 1962 by the American Society of Animal Science.