Table 2.

Characteristics of nine K. pneumoniaestrains with different degrees of resistance to cefoxitin isolated from nine patients

Antimicrobial agentMIC (μg/ml)
CSUB3CSUB7CSUB1CSUB6CSUB4CSUB5CSUB2CSUB11CSUB12
Cefoxitin161632326464128128128
Cefotaxime0.25422128644>25632
Cefpirome4212643216>25632
Ceftazidime16644128>256648>256>256
Ceftazidime-clavulanic acid110.52210.542
Aztreonam1128112832162>256>256
Imipenem0.120.120.060.120.250.120.120.50.5
Meropenem0.030.030.030.030.120.120.521
Ofloxacin888888844
Ciprofloxacin444844822
Sparfloxacin424442411
Porin expression++++±a ±
  • a ±, reduced level of porin expression.