Viridans Group Streptococci and the Oral Ecosystem
نویسندگان
چکیده
منابع مشابه
Mannosidase production by viridans group streptococci.
The production of mannosidase activity by all currently recognized species of human viridans group streptococci was determined using an assay in which bacterial growth was dependent on the degradation of the high-mannose-type glycans of RNase B and subsequent utilization of released mannose. RNase B is an excellent substrate for the demonstration of mannosidase activity since it is a glycoprote...
متن کاملPrevalence rate and antibiotic susceptibility of oral viridans group streptococci (VGS) in healthy children population.
PURPOSE The aim of this study was to evaluated the prevalence rate of oral viridans group streptococci (VGS) and their susceptibilities to some antibiotics in healthy children. MATERIAL AND METHODS Samples of pharyngeal swabs and supragingival dental plaques for microbiological studies were collected from 206 healthy children, aged 4-18 years. Additionally, 75 samples of carious lesions from ...
متن کاملIncidence of mefA and mefE genes in viridans group streptococci.
Viridans group streptococci form the major part of the commensal flora of the human upper respiratory tract. However, these organisms are also the leading cause of infective endocarditis and an increasing source of bacteremia in neutropenic patients (1). Beta-lactam agents are the treatment of choice for these infections, but macrolides and related drugs are recommended for prophylaxis and alte...
متن کاملPhylogenetic analysis of viridans group streptococci causing endocarditis.
Identification of viridans group streptococci (VGS) to the species level is difficult because VGS exchange genetic material. We performed multilocus DNA target sequencing to assess phylogenetic concordance of VGS for a well-defined clinical syndrome. The hierarchy of sequence data was often discordant, underscoring the importance of establishing biological relevance for finer phylogenetic disti...
متن کاملSpecies-Specific Difference in Antimicrobial Susceptibility Among Viridans Group Streptococci
BACKGROUND Viridans group streptococci (VGS) are both commensal microbes and potential pathogens. Increasing resistance to penicillin in VGS is an ongoing issue in the clinical environment. We investigated the difference in susceptibility and resistance to penicillin among various VGS species. METHODS In total 1,448 VGS isolated from various clinical specimens were analyzed over a two-yr peri...
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ژورنال
عنوان ژورنال: Electronic Journal of General Medicine
سال: 2016
ISSN: 2516-3507
DOI: 10.15197/ejgm.1440