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Journal of Nutrition Vol. 69 No. 1 September 1959, pp. 81-84
Copyright © 1959 by American Society for Nutrition
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The Role of Coprophagy in the Availability of Vitamins Synthesized in the Intestinal Tract with Antibiotic Feeding1

M. S. Mameesh, R. E. Webb, H. W. Norton and B. Connor Johnson

Division of Animal Nutrition, University of Illinois, Urbana

Oxytetracycline (100 mg/kg diet) alleviated pantothenic acid deficiency in normal as well as non-coprophagic rats, while penicillin (50 mg/kg diet) improved growth in rats fed a thiamine-limiting diet only when coprophagy was allowed, but not when it was prevented. Obviously, the production, rather than the absorption, of thiamine synthesized by the intestinal microflora was stimulated by penicillin; the thiamine thus produced was not available to the rat except by means of coprophagy. Under similar conditions, pantothenic acid was absorbed on its first passage through the intestinal tract.

1 This study was aided by a grant-in-aid from Chas. Pfizer and Co., Terre Haute, Indiana.

Manuscript received 5 March 1959.




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