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Journal of Dental Research
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Basic Biological Sciences

Cariogenicity of Human Oral Lactobacilli in Hamsters

Robert J. Fitzgerald

Veterans Administration Medical Center, Miami, Florida 33125, Laboratory of Oral Microbiology, University of Miami School of Medicine, Miami, Florida 33125

Dorothea B. Fitzgerald

Veterans Administration Medical Center, Miami, Florida 33125, Laboratory of Oral Microbiology, University of Miami School of Medicine, Miami, Florida 33125

Beatrice O. Adams

Veterans Administration Medical Center, Miami, Florida 33125, Laboratory of Oral Microbiology, University of Miami School of Medicine, Miami, Florida 33125

Luis F. Duany

Veterans Administration Medical Center, Miami, Florida 33125, Laboratory of Oral Microbiology, University of Miami School of Medicine, Miami, Florida 33125

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.

Journal of Dental Research, Vol. 59, No. 5, 832-837 (1980)
DOI: 10.1177/00220345800590051501
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