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R F WISEMAN

Publications and source records attributed to R F WISEMAN.

11 recordsLinked to original sources
PubMed1964

DELAYED APPEARANCE OF LACTOBACILLI IN THE INTESTINES OF CHICKS REARED IN A "NEW" ENVIRONMENT.

Male chicks (1 day old; Vantress x Arbor Acre) were fed a basal folic acid-deficient diet, a 5% uric acid-containing diet with and without 5 mg/lb (453.5 g) of bacitracin and 20 mg/lb of sodium penicillin G, the basal diet supplemented with only the antibiotics, and the basal diet plus 500 mug/lb of folic acid. The chicks were reared in a room which had not been used previously for housing chickens ("new" environment). Bacteriological analyses of the contents of the small intestine revealed a decrease in numbers of streptococci and "anaerobic" bacteria in the chicks receiving dietary antibiotics. No persistent changes were seen in the numbers of coliform bacteria. Lactobacilli were not detected in any of the groups until 3 weeks after feeding.

Animals↗
PubMed1964

EFFECT OF DIETARY ANTIBIOTICS UPON COLIFORM BACTERIA AND LACTOBACILLI IN THE INTESTINAL TRACT OF URIC ACID-FED CHICKS.

Bare, L. N. (University of Kentucky, Lexington), R. F. Wiseman, and O. 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 acid-containing 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 numbers of uricolytic Aerobacter spp. and an increased degradation of uric acid in the tract of the "uric-antibiotic"-fed chicks. The counts of lactobacilli were always lowest in this group of chicks

Animals↗
PubMed1964

EFFECT OF URIC ACID ON RIBOFLAVINE PRODUCTION BY INTESTINAL COLIFORM BACTERIA.

Lau, H. S. (University of Kentucky, Lexington), and R. F. Wiseman. Effect of uric acid on riboflavine production by intestinal coliform bacteria. J. Bacteriol. 87:337-340. 1964.-Cultures of Escherichia coli, Aerobacter aerogenes, and Paracolobactrum species, isolated from human feces and from intestinal contents of rats, were tested for riboflavine synthesis in a chemically defined medium. Riboflavine was assayed by a fluorometric method and by microbiological assay. When uric acid was added to the synthetic medium at levels ranging from 10 to 750 mug/ml, it inhibited the production of riboflavine, but did not affect the growth of the bacteria. As the amount of uric acid in the medium was increased from 10 to 750 mug, there was a corresponding decrease in the amount of riboflavine produced. Some disappearance of uric acid was observed in the cultures. These results suggest that uric acid, or its degradation products, may have acted as an antimetabolite or an enzyme inactivator in the biosynthesis of riboflavine.

Antimetabolites↗