Distribution of Qnr determinants according to ESBL or plasmid-mediated AmpC β-lactamases among clinical isolates of Klebsiella pneumoniae and Escherichia colia

Strain and ESBL(s) or plasmid-mediated AmpC β-lactamase(s)No. of isolates with:
TotalqnrA1qnrB4qnrB2qnrB5qnrB2 and qnrB5
Klebsiella pneumoniae (n = 158)
    DHA-1, CTX-M-1411
    DHA-1, TEM-5222
    SHV-12, DHA-11212
    SHV-12, pI 7.811
Escherichia coli (n = 81)
    CMY-2, CTX-M-1421
    DHA-1, TEM-5211
  • a The TEM-1 β-lactamase is not described in this table.