Nutrition of the Mouse. IV. Comparison of Bacterial Population of Two Highly Inbred Strains.

Abstract
These studies were carried out to determine whether the observed strain differences in mice with respect to their requirements for certain members of the vit. B complex could in part be explained on the basis of differences in the bacterial population of the cecum. It was found that mice of the C57 strain (tumor-resistant) had a greater amt. of cecel content and thus a greater bacterial population if the animals were fed a synthetic diet than did mice of the A strain (susceptible to spontaneous mammary tumors) fed this same diet. No such difference was detectable if the mice were fed a stock ration.

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