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Appl Environ Microbiol. 1966 January; 14(1): 70-73
Copyright © 1966 American Society for Microbiology. All Rights Reserved.

Influence of Diet and Age on Bacterial Counts of Ileal Digesta and Feces Obtained from Young Calves¹

Departments of Bacteriology and Animal Science, Iowa State University, Ames, Iowa

ABSTRACT

The numbers of total aerobes, total anaerobes, and facultatively aerobic lactobacilli, streptococci, and coliform bacteria were determined in samples of ileal digesta and feces from calves 0, 3, 6, 9, and 12 hr after feeding milk, or milk with sucrose or starch added. Differences in the flora could be attributed to diurnal variation (time from feeding to sampling), source of the sample (ileal versus fecal), nature of the dietary carbohydrate (lactose versus lactose plus sucrose versus lactose plus starch) and age of the animal (on a diet of milk plus sucrose).

² Present address: Department of Dairy and Poultry Science, Kansas State University, Manhattan.

¹ Journal Paper No. J-5146 of the Iowa Agricultural and Home Economics Experiment Station, Ames. Projects No. 1267 and 1324.