نتایج جستجو برای: viridans streptococci

تعداد نتایج: 8560  

Journal: :journal of dentistry, tehran university of medical sciences 0
asif yousuf anup nagaraj shravani ganta mohsin sidiq sonia pareek preeti vishnani

objectives: probiotic approaches are being considered to eliminate pathogenic microorganisms and are an alternative and promising way to combat infections by using harmless bacteria to displace pathogenic microorganisms. the aim of this study was to evaluate the effectiveness of commercially available freeze dried powdered probiotics on mutans streptococci count among 12-15 year-old indian scho...

Journal: :Journal of Pure and Applied Microbiology 2022

Viridans streptococci are important causative organism of infective endocarditis, which is a disease having long-lasting effects among the patients who live with as well those cured. Infective endocarditis due to viridans generally usually affects persons structural heart and also associated intravascular prosthetic devices. After onset bacteremia pathogenic streptococci, vegetation formed in o...

Journal: :journal of dentistry, tehran university of medical sciences 0
y. refoua

statement of problem: streptococcus viridans is one of the most important micro-organisms in the establishment of infections leading to dental caries and heart valve damages. therefore the diagnosis and prevention of these infections is critical in health care. purpose: the aim of this in-vivo study was to determine the prevalence of viridans streptococci in abscesses occurring in the maxillofa...

Journal: :Clinical infectious diseases : an official publication of the Infectious Diseases Society of America 2001
Y Uehara K Kikuchi T Nakamura H Nakama K Agematsu Y Kawakami N Maruchi K Totsuka

In an accompanying report, we showed that viridans group streptococci may prevent methicillin-resistant Staphylococcus aureus (MRSA) colonization of the oral cavities of newborns. In the present study, we investigated the mechanism of prevention in vitro. Most viridans group streptococci had bacteriocin-like activity and killed MRSA, Burkholderia cepacia, Enterobacter aerogenes, and Pseudomonas...

Journal: :Applied and environmental microbiology 2000
A J Vriesema R Brinkman J Kok J Dankert S A Zaat

Viridans group streptococci are major constituents of the normal human oral flora and are also identified as the predominant pathogenic bacteria in native valve infective endocarditis. Little information is available regarding the regulation of gene expression in viridans group streptococci, either in response to changes in the oral environment or during development of endocarditis. We therefor...

Journal: :Journal of clinical microbiology 1979
D G Beckwith

A prospective study was conducted to evaluate the radiometric detection of group D and viridans streptococci in blood, using three media preparations, Bactec 6A and 6B isotonic media and 8B hypertonic medium. All enterococci tested were detected by the 6A and 6B media. However, the 6A medium failed to detect 76% of the Streptococcus bovis isolates and 57% of the viridans streptococci, whereas a...

Journal: :Kulak burun bogaz ihtisas dergisi : KBB = Journal of ear, nose, and throat 2006
Erol Keleş Murat Aral H Cengiz Alpay

OBJECTIVES To investigate antibiotic sensitivities of Streptococcus pneumoniae, viridans streptococci, and group A hemolytic streptococci isolated from the culture materials obtained from the sinuses of patients undergoing functional endoscopic sinus surgery due to chronic sinusitis. PATIENTS AND METHODS We recruited 93 patients (63 males, 30 females; mean age 36+/-17.5; range 19 to 68 years)...

Journal: :The Journal of Experimental Medicine 1957
Richard M. Bracco Marjorie R. Krauss Amy S. Roe Colin M. MacLeod

Reciprocal transformation reactions to streptomycin resistance have been demonstrated between pneumococcus and 2 strains of viridans streptococci, which by the usual bacteriological criteria are distantly related to pneumococcus. Desoxyribonucleic acid (DNA) extracts of a strain of streptomycin-resistant Streptococcus salivarius have been found capable of transforming pneumococcus and two strai...

Journal: :Antimicrobial agents and chemotherapy 1986
R J Fass V L Helsel

The in vitro activities of LY146032 and seven comparative antimicrobial agents against 14 species of staphylococci, streptococci, and enterococci were studied. MICs of LY146032 were less than or equal to 0.5 microgram/ml for all staphylococci, including oxacillin-resistant strains; less than or equal to 0.25 microgram/ml for all streptococci (except viridans group streptococci); and less than o...

2016
Dalia Denapaite Martin Rieger Sophie Köndgen Reinhold Brückner Irma Ochigava Peter Kappeler Kerstin Mätz-Rensing Fabian Leendertz Regine Hakenbeck

Viridans streptococci were obtained from primates (great apes, rhesus monkeys, and ring-tailed lemurs) held in captivity, as well as from free-living animals (chimpanzees and lemurs) for whom contact with humans is highly restricted. Isolates represented a variety of viridans streptococci, including unknown species. Streptococcus oralis was frequently isolated from samples from great apes. Geno...

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