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Effect of Feeding Chloromycetin Mycelial Meal upon the Growth and Fecal Microflora of Swine

Texas Agricultural Experiment Station

Abstract

Weanling pigs were fed an all-vegetable protein diet supplemented with various combinations of meat scraps, vitamin B₁₂ and chloromycetin mycelial meal. The addition of vitamin B₁₂ to the basal ration did not result in a significant increase in gain or in feed efficiency. Adding chloromycetin mycelial meal to the basal diet did not produce a significant increase in gain and did not cause a significant increase in feed efficiency.

The addition of meat scraps to the diet increased the total number of clostridia and this number was greatly lowered by the addition of chloromycetin. Chloromycetin increased the total count and the number of chloromycetin resistant organisms. This increase in these microorganisms possibly could lead to a "sparing" or "synthesis" of certain nutrients or unidentified factors.

¹ Departments of Biochemistry and Nutrition, Poultry Husbandry and Animal Husbandry, Texas Agricultural Experiment Station, Texas Agricultural & Mechanical College System, College Station, Texas.

² This work was supported in part by grants-in-aid from the Research Corporation, William Waterman Fund 804, 405 Lexington Avenue, New York, N. Y., and also by Parke, Davis and Company, Detroit, Michigan.