Background: Plasmid mediated quinolone resistant determinants (PMQRs) are found to be of clinical relevance because it causes decreased susceptibility to quinolones which are valuable antibiotics against intrinsically resistant Serratia marcescens. This study aimed to determine the occurrence of PMQR determinants (qnr, aac(6′)-Ibcr and qep) and their relation with extended-spectrum β-lactamase (ESBL) and / or Amp C-producing S. marcescens.
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