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Journal of Dental Research, Vol 59, 832-837, Copyright © 1980 by International & American Associations for Dental Research Online Journals

ARTICLES

Cariogenicity of human oral lactobacilli in hamsters

R. J. Fitzgerald, D. B. Fitzgerald, B. O. Adams and L. F. Duany

Of 50 strains of lactobacilli isolated from dental plaque of school children, two strains, provisionally identified as Lactobacillus salivarius, and one strain, provisionally identified as Lactobacillus fermentum, induced significant caries activity in conventional hamsters. Sucrose was a required dietary cariogenic substrate and could not be replaced with glucose or starch. In contrast to cariogenic strains of Streptococcus mutans the active lactobacilli did not form adherent sucrose-mediated plaques in vitro, did not form intracellular iodophilic polysaccharides and did not form detectable insoluble extracellular polyglucans.




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