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- W2242734317 abstract "Background: Streptococci detected in various regions of the body as normal flora are Gram positive diplococci, non-spore forming and non-motile bacteria. Streptococci can be classified according to biochemical and antigenic properties and the ability to produce hemolysis on blood agar. The diameter of beta hemolitic streptococci colonies are generally greater than 0.5mm and these are called pyogen; on the other hand bacteria whose colonies are smaller than 0.5mm (pin-point) are called Streptococcus milleri group in Europe and Streptococcus anginosus group in America. Streptococcus milleri group are classified into three species; Streptococcus anginosus, Streptococcus intermedius, Streptococcus constellatus. S. milleri group bacteria are genetically related to non-hemolitic streptococci. Methods & Materials: 100 streptococci strains were isolated from throat samples and also from other body sites such as abcess, blood and pustules. VP, CAMP tests, esculin and urease hydrolisis, sugar fermatation tests and Niven’s arginin hydrolysis test were carried out for pin-point colonies and species identification was carried by API 20 Strep kit and by PCR (table). Antibiotic susceptibility testing was carried out according to Clinical and Laboratory Standards Institute (CLSI) criteria. Results: All isolates were VP positive, PYR negative and did not hydrolyse hippurat; two strains were urease positive. All strains was found to be susceptible to vancomycin, ceftriaxone, cefepime, cefotaxime, levofloxacin, linezolid antibiotics. 16% of strains (10 S.anginosus, 4 S.constellatus)were found to be resistant to erythromycin. 6% of the strains (5 S.anginosus, 3 S.constellatus) were resistant to clindamycin and 5% (3 S.constellatusve 2 S.anginosus) of the strains were found to be resistant to tetracycline. According to PCR results of 100 isolates, 56 were identified as S.anginosus and 8 were identified as S.intermedius. Conclusion: It was determined that biochemical identification scheme is not satisfactory forStreptococcus milleri group. No emergence antibiotic resistance was determined. However, MIC should be investigated for strains isolated from sterile body parts. Commercially available biochemical kits are inadequent and identification should besupported with molecular methods. This study is thought to be a backbone for other studies in the future." @default.
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- W2242734317 date "2014-04-10" @default.
- W2242734317 modified "2023-09-26" @default.
- W2242734317 title "Typing of Streptococcus Milleri group by molecular and biochemical methods" @default.
- W2242734317 doi "https://doi.org/10.7490/f1000research.1095178.1" @default.
- W2242734317 hasPublicationYear "2014" @default.
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