Comparison of testing methods for detection of decreased linezolid susceptibility due to G2576T mutation of the 23S rRNA gene in Enterococcus faecium and Enterococcus faecalis |
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Authors: | Qi Chao Zheng Xiaotian Obias Arlene Scheetz Marc H Malczynski Michael Warren John R |
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Institution: | Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA. cqi451@northwestern.edu |
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Abstract: | E-test, Vitek 2, MicroScan, agar dilution, and disk diffusion were compared for detection of decreased linezolid susceptibility due to 23S rRNA gene G2576T mutation among 32 clinical Enterococcus strains initially reported as intermediate or resistant by E-test alone or Vitek 2 confirmed by E-test. Agar and broth dilution methods were in concordance with PCR detection of the mutation, and disk diffusion was somewhat less sensitive but equally specific. |
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