Table 3.

Antimicrobial susceptibilities, pIs of β-lactamases, and plasmid sizes of CMY-1 producing K. pneumoniae strains

StrainaMIC (μg/ml) ofb:pI(s) of β-lactamase(s)cPlasmid size(s) (kb)
AMPCFXCTXCAZATM
KY02>512512322<18.0130, 77
pKY21286416<1<18.077
KY03>51225684<18.0130, 77
pKY31286416<1<18.077
KY041286484<18.0130, 77
KD08>51212816448.0130
pKD812825632228.0130
KY23>5126464512>5128.0, 8.2142, 106
KY29>512>5122563288.0, 7.6142, 106
KY05>512>512>5125125128.0, 5.4, 5.9142, 83
K S18>512>512128>512>5128.0, 5.4, 5.9142, 83
  • a pKY2, pKY3, and pKD8 are transconjugants.

  • b Abbreviations: AMP, ampicillin; CFX, cefoxitin; CTX, cefotaxime; CAZ, ceftazidime; ATM, aztreonam.

  • c In addition to the chromosomal SHV-type β-lactamase of K. pneumoniae.