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J Dent Res 38(3): 611-617, 1959
© 1959 International and American Associations for Dental Research
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A SURVEY OF LACTOBACILLI INCLUDING PIGMENTED STRAINS FROM THE ORAL CAVITY OF THE WHITE RAT

H. V. JORDAN 1, R. J. FITZGERALD 1, and J. E. FABER JR. 1

1 National Institute of Dental Research, U. S. Department of Health, Education and Welfare, Bethesda, Md., and Department of Microbiology, University of Maryland, College Park, Md.

The oral cavity of weanling and adult rats was sampled for lactobacilli, using a selective medium. Variants of L. fermenti were the only heterofermentative type found. These included chromogenic strains which produced a rusty-orange pigment.

L. plantarum was the principal homofermentative species found in weanling rats. L. acidophilus/ and three previously undescribed homofermentative lactobacillus types predominated in the adult rat.

Nutritional and biochemical characteristics of the rat oral lactobacilli have been presented.

Submitted on January 5, 1959
Revised on February 21, 1959






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