Species-specific difference in antimicrobial susceptibility among viridans group streptococci

Annals of Laboratory Medicine
Sejong ChunNam Yong Lee

Abstract

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. In total 1,448 VGS isolated from various clinical specimens were analyzed over a two-yr period. Identification and antimicrobial susceptibility test was performed by the automated VITEK 2 system (bioMerieux, France) or the MicroScan MICroSTREP system (Siemens, Germany). Among the 1,448 isolates, 412 were isolated from blood (28.4%). Streptococcus mitis group was the most frequently isolated (589 isolates, 40.7%), followed by the S. anginosus group (290 isolates, 20.0%), S. sanguinis group (179 isolates, 12.4%) and S. salivarius group (57 isolates, 3.9%). In total, 314 isolates could not be identified up to the species level. The overall non-susceptibility to penicillin was observed to be 40.0% (resistant, 11.2% and intermediately resistant, 28.8%) with uneven distribution among groups; 40.2% in S. sanguinis group (resistant, 5.0% and intermediately resistant, 35.2%), 60.3% in S. mitis group (resistant, 20.9% and intermediately resistant, 39.4%), 78....Continue Reading

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Citations

Sep 18, 2020·Biocontrol Science·Yeon-Hee Kim, Si Young Lee
Dec 31, 2019·Case Reports in Infectious Diseases·Ashley ReuterMichael S Wang
Jul 19, 2018·Case Reports in Infectious Diseases·David NygrenMagnus Rasmussen
Jun 27, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Rafik KaramanZeinab Breijyeh

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Methods Mentioned

BETA
bronchoalveolar lavage

Software Mentioned

SPSS

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