Results 211 to 220 of about 155,988 (261)

Streptococcus mutans Dextransucrase: A Review

1978
Publisher Summary Two factors contribute to the cariogenic potential of Streptococcus mutans ( S. mutuns). These factors include its ability to produce high yields of lactic acid from a variety of carbon sources and its ability to adhere to hard surfaces by the action of its extracellular polysaccharides. S.
T J, Montville, C L, Cooney, A J, Sinskey   +2 more
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Cariogenicity of Mutants of Streptococcus mutans

Journal of Dental Research, 1980
In 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.
M W, Mao, S, Rosen
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Pulp response to Streptococcus mutans

Oral Surgery, Oral Medicine, Oral Pathology, 1987
The 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.
R C, Paterson, S K, Pountney
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Streptococcus mutans, not detected?

Oral Microbiology and Immunology, 1989
The growth of Streptococcus mutans was followed for three years in 24 healthy 12‐17 year‐old children, who were selected for the study on the basis of undetectable levels of salivary S. mutans. The saliva samples were cultured by a dip‐slide method based on mitis‐salivarius agar supplemented with sucrose and bacitracin.
S, Alaluusua, L, Grönroos, E, Kleemola-Kujala   +2 more
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A Levansucrase from Streptococcus mutans

Caries Research, 2009
One of the predominant bacteria in early dental plaque, Streptococcus mutans, has been shown to synthesize levansucrase. This enzyme was obtained from the supernatant fluid of a glucose-broth culture. Purification of the enzyme was achieved in two steps by adsorption on hydroxylapatite followed by isoelectric focusing and fractionation.
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Chromosomal Deletions in Streptococcus mutans

1997
The 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.
C R, Lewis, R R, Russell
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Virulence properties of Streptococcus Mutans

Frontiers in Bioscience, 2004
Streptococcus 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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Lipid Composition of Streptococcus mutans

Caries Research, 2009
Cellular 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 C_16:0 and C_18:1 components as well as traces of cyclopropane acids. The neutral lipids showed the presence
E I, Szabo, B H, Amdur, S S, Socransky
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Invertase activity in Streptococcus mutans and Streptococcus sanguis

Archives of Oral Biology, 1973
Abstract 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, E E, Smith, R A, Cowman
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Extracellular invertase in Streptococcus mutans and Streptococcus salivarius

Life Sciences, 1974
Summary 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.
B M, Chassy, R M, Bielawski, J R, Beall, E V, Porter, M I, Krichevsky, J A, Donkersloot   +5 more
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