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Journal of Nutrition Vol. 41 No. 3 July 1950, pp. 423-431
Copyright © 1950 by American Society for Nutrition
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Congenital Anomalies in the Chick Due to Vitamin B12 Deficiency1 ,2 ,3 ,4 ,5

Two Figures

Orlando Olcese, J. R. Couch, J. H. Quisenberry and P. B. Pearson

Departments of Biochemistry and Nutrition and Poultry Husbandry, A. and M. College of Texas and Texas Agricultural Experiment Station, College Station

A definite peak of embryonic mortality occurred at the 17th day of incubation in eggs from hens fed a diet deficient in vitamin B12. The most characteristic symptom of deficiency present in the embryos was myoatrophy of the leg, a condition which is characterized by atrophy of the muscles of the leg. The legs are slender, about normal in length and hemorrhagic in appearance.

A malposition, "head between the thighs," occurred with unusual frequency in eggs from hens fed a vitamin B12-deficient diet.

Other anomalies associated with vitamin B12 deficiency in this study were hemorrhages of the embryo and allantois and perosis.

1 Supported in part by a grant from The Lederle Laboratories, Pearl River, New York.

2 The crystalline vitamins and APF concentrates used in this study were generously supplied by Merck and Company, Inc., Rahway, N. J., and the Lederle Laboratories, Pearl River, New York.

3 Soybean protein was supplied through the courtesy of the Buckeye Cotton Oil Company, Cincinnati, Ohio.

4 Soybean oil was contributed by Dr. J. E. Hunter, Allied Mills, Inc., Libertyville, Illinois, and the Buckeye Cotton Oil Company, Cincinnati, Ohio.

5 The methionine and glycine used in this study were supplied through the courtesy of Dr. Julius Johnson, Dow Chemical Company, Midland, Michigan.

Manuscript received 6 February 1950.




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