J. Anim Sci.
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J. Anim Sci. 1957. 16:3-11.
© 1957 American Society of Animal Science
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Calcium and Zinc in Parakeratosis of Swine1

R. W. Luecke, J. A. Hoefer, W. S. Brammell and D. A. Schmidt2

Michigan State University

Abstract

The data contained in this paper are a result of two separate experiments involving a total of 10 lots of 10 pigs each. In the first trial the feeding of a ration containing 0.65% calcium and 0.53% phosphorus resulted in good growth; however, a 10% incidence of parakeratosis was noted. The feeding of a ration containing 1.25% calcium and 0.95% phosphorus resulted in very poor growth and a 100% incidence of parakeratosis.

In the second trial the feeding of a ration containing 0.51% calcium and 0.61% phosphorus resulted in depressed growth and a 40% incidence of parakeratosis. In addition, rations containing 1.21% calcium and 1.90% calcium both with 0.61% phosphorus resulted in severely depressed growth and a 100% incidence of parakeratosis.

In both trials the supplementation of all rations with 50 p.p.m.of zinc (as zinc carbonate) markedly increased growth rate, improved feed efficiency and completely prevented symptoms of parakeratosis.

In all cases symptoms of parakeratosis were alleviated by zinc therapy.

In the second trial, preliminary studies indicated that dietary zinc increased serum alkaline phosphatase activity.

Footnotes

1 Published with the approval of the Director of the Michigan Agricultural Experiment Station as Journal Article No. 1940.

2 Departments of Agricultural Chemistry, Animal Husbandry and Animal Pathology, East Lansing. The authors are indebted to the American Cyanamid Co., Pearl River, N. Y. for the Aurofac, and to Merck and Co., Inc., Rahway, New Jersey for the B vitamin supplement used in the experiments.






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Copyright © 1957 by the American Society of Animal Science.