J. Anim Sci.
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J. Anim Sci. 1968. 27:1716-1721.
© 1968 American Society of Animal Science
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Mineral Studies in Ovine Phosphatic Urolithiasis1

L. V. Packett2, R. O. Linebergee3 and H. D. Jackson

Purdue University, Lafayette, Indiana

Abstract

The effects of some dietary factors on calcium, magnesium, phosphorus, sodium and potassium metabolism (as reflected in the urine and serum values and in metabolic balance studies) are compared with the incidence of urinary calculi in wethers.

In two experiments a total of 142 sheep were divided into seven different lots and were fed the basic calculogenic diet of Packett and Hauschild (1964), plus supplements consisting of sodium citrate, calcium citrate, vitamin D3, or calcium carbonate.

A high incidence of calculi was observed in wethers receiving the basal diet and all supplemented diets except those supplemented with calcium citrate. The highest incidence of calculi (80%) occurred in the wethers supplemented with vitamin D3; the lowest incidence (0–4%) in the wethers supplemented with calcium citrate.

The serum and urine of wethers on calculi provoking diets were characterized by high serum magnesium and phosphorus, high concentrations of urinary magnesium and phosphorus, and low serum calcium. Metabolism studies revealed that non-caluli wethers excreted more phosphorus and magnesium via the feces, excreted less magnesium and phosphorus via the urine, retained less magnesium and phosphorus and had lower serum magnesium and serum phosphorus levels.

Footnotes

1 Contribution from the Department of Biochemistry, Purdue University Agricultural Experiment Station, Lafayette, Indiana 47907, as Journal Paper No. 3333.

2 Present address: Nutrition and Food Science Department, Erickson Hall, Lexington, Kentucky 40506.

3 Present address: Route 1, Lucia Road, Stanley, North Carolina.






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Copyright © 1968 by the American Society of Animal Science.