Results 171 to 180 of about 63,277 (188)
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Cariogenicity of Mutants of Streptococcus mutans
Journal of Dental Research, 1980In this study, we induced a number of mutants of S. mutans differing in their abilities to synthesize glucan and produce acid. When tested for cariogenicity in gnotobiotic rats, "high pH" mutants caused less caries, but could not supplant a cariogenic parent strain.
S. Rosen, Michael W.H. Mao
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Chromosomal Deletions in Streptococcus mutans
1997The oral bacterium Streptococcus mutans possesses the ability to ferment a wide range of carbohydrates, which results in the production of acids that can cause demineralisation of tooth enamel and subsequent dental caries. However, it has been shown that approximately 11% of independent isolates of S.
Roy R. B. Russell, C. R. Lewis
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Lipid Composition of Streptococcus mutans
Caries Research, 1978Cellular fatty acids and extractable intact lipids of five strains of Streptococcus mutans grown on chemically defined medium were studied. The fatty acids were characterized by the predominance of the C16:0 and C18:1 components as well as traces of cyclopropane acids.
E.I. Szabo, B.H. Amdur, S.S. Socransky
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Pulp response to Streptococcus mutans
Oral Surgery, Oral Medicine, Oral Pathology, 1987The maxillary molar pulps of germ-free rats were mechanically exposed, and suspensions of a strain of freshly grown Streptococcus mutans were applied to the pulp wounds. The pulps were left open to the oral environment, and the animals were maintained in the isolator until they were killed in groups after 2, 7, and 28 days.
Robert C. Paterson, Stephen K. Pountney
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A Levansucrase from Streptococcus mutans
Caries Research, 1970One of the predominant bacteria in early dental plaque, Streptococcus mutans , has been shown to synthesize levansucrase.
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Invertase activity in Streptococcus mutans and Streptococcus sanguis
Archives of Oral Biology, 1973Abstract Toluene treatment of intact cells revealed invertase-like activity in Streptococcus mutans K1-R (cariogenic) and in Streptococcus sanguis 903–1600 (noncariogenic). The activity was identified as a β- d -fructofuranoside fructohydrolase (invertase; EC.
M.M. McCabe, R.A. Cowman, E.E. Smith
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Nutritional Requirements of Streptococcus mutans
Caries Research, 1970Ten strains of Streptococcus mutans, representing four serological groups, have been grown in chemically defined media. For anaerobic growth, one of the strains required the following organic compounds: glucose, cysteine (or thioglycolic acid), biotin, p-aminobenzoic acid, thiamine, riboflavin, pyridoxine, pantothenic acid and nicotinic acid.
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Extracellular invertase in Streptococcus mutans and Streptococcus salivarius
Life Sciences, 1974Summary Cultures of representative oral streptococci were fractionated and assayed for glycosyltransferases and invertase. Considerable extracellular invertase activity was found in five Streptococcus mutans strains and one Streptococcus salivarius strain. For example, in cultures of S.
Robert M. Bielawski +5 more
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Virulence properties of Streptococcus Mutans
Frontiers in Bioscience, 2004Streptococcus mutans is considered one of the primary causative agents of dental caries and can also be a source of infective endocarditis. The main virulence factors associated with cariogenicity include adhesion, acidogenicity, and acid tolerance. Each of these properties works coordinately to alter dental plaque ecology.
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Ribose biosynthesis in Streptococcus mutans
Archives of Oral Biology, 1977Abstract Crude extracts of Streptococcus salivarius ATCC 25975 and the five serological types of Streptococcus mutans were assayed under various conditions for the enzymes glucose 6-phosphate dehydrogenase, 6-phosphogluconate dehydrogenase, transketolase and transaldolase.
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