THE EFFECT OF AUREOMYCIN AND TERRAMYCIN ON CANDIDA ALBICANS IN THE FECAL MICROFLORA OF CHICKS AND TURKEY POULTS

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Abstract
Chicks and turkey poults maintained on a diet free of antibiotics did not possess detectable nos. of wild yeasts in the fecal microflora. Oral inoculation of C. albicans established this yeast as a component member of the fecal microflora of birds fed the basal diet and the diet supplemented with Aureomycin or Terramycin (1000 ppm.). Incorporation of either antibiotic in the diet resulted in a higher yeast population and lower lactobacilli and coliform counts than in birds fed the basal diet. The increased nos. of C. albicans was consistent throughout the various regions of the intestinal tract. No consistent differences were noted in comparing the effects of Aureomycin with Terramycin. Lesions of the crop due to the pathogenic yeast were observed only in the poults and were most severe in birds fed the antibiotic-supplemented diets. These birds survived the expt., whereas the poults 3853-3867 CHEMOTHERAPY [Vol. 29] 374 maintained on the basal diet died. Microorganisms possessing antagonism for C. albicans occurred only in the feces of the birds fed diets containing antibiotics.