Effect of Dietary Antibiotics Upon Coliform Bacteria and Lactobacilli in the Intestinal Tract of Uric Acid-Fed Chicks

Abstract

BARE, L. N. (University of Kentucky, Lexington), R. F. WISEMAN, AND 0. J. ABBOTT. Effect of dietary antibiotics upon coliform bacteria and lactobacilli in the intestinal tract of uric acid-fed chicks. J. Bacteriol. 87:329-331. 1964.-Male chicks (1-day-old; Vantress X Arbor Acre) were fed a basal glucose-soybean oil meal diet, a 2% uric acidcontaining diet with and without 5 mg/lb of zinc bacitracin and 20 mg/lb of procaine penicillin G, and one supplemented with the antibiotics only. After 4 weeks, the chicks receiving the uric acid without antibiotics showed a weight depression. The presence of antibiotics in the ration with the uric acid reversed this growth depression. Bacteriological and chemical analyses of the contents of the small intestine revealed an increase in num

Delayed Appearance of Lactobacilli in the Intestines of Chicks Reared in a “New” Environment

“…diet, but the lactobacilli, which were detected within 1 week, were not suppressed completely (Bare, Wiseman, and Abbott, 1964). In that study, most of the lactobacilli isolated after 1 week of feeding were sensitive to less than 5 ,ug of bacitracin and 5 ,ug of penicillin per ml of culture medium.…”