Contribution of vraSR and graSR Point Mutations to Vancomycin Resistance in Vancomycin-Intermediate Staphylococcus aureus

Antimicrobial Agents and Chemotherapy
2009.0

Abstract

We describe here the genetic analysis of a vancomycin-susceptible Staphylococcus aureus (VSSA) strain, Mu50Omega, a strain related to vancomycin-intermediate S. aureus (VISA) strain Mu50. Using a combination of Mu50Omega whole-genome sequencing and genome engineering, we observed a stepwise evolution of vancomycin resistance from VSSA to VISA after the mutated vraS and graR genes of Mu50 were engineered into Mu50Omega.

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