نتایج جستجو برای: mutans streptococci

تعداد نتایج: 13025  

Journal: :International journal of paediatric dentistry 2007
Pernilla Lif Holgerson Inger Sjöström Christina Stecksén-Blicks Svante Twetman

OBJECTIVE The aim of this study was to investigate the effect of a fixed daily dose of xylitol on mutans streptococci in saliva and the amount of visible dental plaque. A second aim was to explore if the possible effects differed between children with and without caries experience. METHODS The study was designed as a double-blind randomized controlled trial with two parallel arms. All pupils ...

2012
Archana Devi Virender Singh

Dental plaque, biofilms of microorganisms on tooth surface, plays an important role in the development of caries and periodontal disease. Our aim was to check the prevalence of bacteria in dental plaque and to test in vitro antibacterial activity of antibiotics and pomrgranate extracts against dental plaque bacteria. Doxycycline and clindamycin showed highest range of antibacterial activity aga...

Journal: :Applied and environmental microbiology 2008
Anirban Banerjee Indranil Biswas

Inactivation or selective modification is essential to elucidate the putative function of a gene. The present study describes an improved Cre-loxP-based method for markerless multiple gene deletion in Streptococcus mutans, the principal etiological agent of dental caries. This modified method uses two mutant loxP sites, which after recombination creates a double-mutant loxP site that is poorly ...

Journal: :Infection and immunity 1992
K M Schilling W H Bowen

Many researchers have suggested that the role of glucan-mediated interactions in the adherence of Streptococcus mutans is restricted to accumulation of this cariogenic bacterium following its sucrose (i.e., glucan)-independent binding to saliva-coated tooth surfaces. However, the presence of enzymatically active glucosyltransferase in salivary pellicle suggests that glucans could also promote t...

Journal: :Infection and immunity 1975
F W Chorpenning H R Cooper S Rosen

Antisera to the whole cells of Streptococcus mutans cross-reacted with antigen extracts from four other gram-positive species, as well as with those of three other oral streptococci. Similarly, antisera to these bacteria cross-reacted with extracts from S. mutans and with those from each other. Using a purified phenol extract of the walls of S. mutans, which was identified by chemical, immunoch...

2012
Buwembo William Charles Mugisha Rwenyonyi Göte Swedberg Fred Kironde

The selection of antibiotic resistance by cotrimoxazole prophylaxis was evaluated, and we characterized the mechanism of cotrimoxazole resistance in Streptococcus mutans and Streptococcus sobrinus. In vitro susceptibility to six antibiotics was evaluated on 64 mutans streptococci group (MSG) isolates from a cotrimoxazole prophylaxis group and compared to 84 MSG isolates from a nonprophylaxis gr...

Journal: :Indian Journal of Medical Research 2016

Journal: :The new microbiologica 2006
Caterina Signoretto Gloria Burlacchini Franco Bianchi Giacomo Cavalleri Pietro Canepari

Several foods have been shown to contain natural components (especially polyphenols) which display anti-adhesive properties against Streptococcus mutans, the aetiological agent responsible for dental crown caries, as well as inhibition of glucosyltransferases, which are the S. mutans enzymes involved in the synthesis of an adherent, water-insoluble glucan from sucrose. Other studies have demons...

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