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Effect of a Combination of Diethylstilbestrol and Methyltestosterone, Sex and Dietary Protein Level on Some Serum Lipids of Finishing Swine

Eli Lilly and Company, Greenfield, Indiana

Abstract

Eighty crossbred (54 kg.) pigs were utilized to evaluate the effect of a dietary combination of diethylstilbestrol and methyltestosterone, sex (barrow vs. gilt) and dietary protein level (10, 12, 14 and 16%) on the levels of cholesterol, triglyceride and free fatty acids in blood serum. Serum cholesterol decreased as dietary protein level increased, but was not affected by sex or the hormonal combination. The hormonal combination caused a decrease of serum triglyceride in gilts but not in barrows.Serum from barrows contained a lower level of triglyceride than serum from gilts. The magnitude of this sex difference was substantial when control diets were fed, but minimal when diets containing the hormonal combination were fed. Serum free fatty acids were unaffected by treatment.

¹ Present address: Department of Animal Science, University of Illinois, Urbana.