4.7 Article

Acquisition of High-Level Mupirocin Resistance and Its Fitness Cost among Methicillin-Resistant Staphylococcus aureus Strains with Low-Level Mupirocin Resistance

Journal

JOURNAL OF CLINICAL MICROBIOLOGY
Volume 47, Issue 12, Pages 4158-4160

Publisher

AMER SOC MICROBIOLOGY
DOI: 10.1128/JCM.01022-09

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Funding

  1. Children's Hospital of Illinois
  2. William H. Albers Chair of Pediatrics, University of Illinois College of Medicine at Peoria

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We investigated whether methicillin (meticillin)-resistant Staphylococcus aureus (MRSA) isolates with low-level mupirocin resistance can serve as recipients of a pSK41-like plasmid conferring high-level mupirocin resistance without substantial fitness cost. Our results suggest that acquisition of the plasmid conferring high-level mupirocin resistance was not necessarily associated with fitness cost in some MRSA recipients with low-level mupirocin resistance.

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