Association of QnrB Determinants and Production of Extended-Spectrum β-Lactamases or Plasmid-Mediated AmpC β-Lactamases in Clinical Isolates of <i>Klebsiella pneumoniae</i>

Abstract excerpt

Clinical isolates of Escherichia coli and Klebsiella pneumoniae producing extended-spectrum beta-lactamases or plasmid-mediated AmpC beta-lactamases were screened for qnrA and qnrB genes. QnrB was present in 54 of 54 DHA-1-producing K. pneumoniae isolates and 10 of 45 SHV-12-producing ones, suggesting that the distribution of plasmids conferring resistance to extended-spectrum cephalosporins and quinolones in...

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