Table 2.

β-Lactam MICs for ESBL-producing P. mirabilis strains and their E. coli transconjugants

β-LactamsMIC (μg/ml) for the following strains (enzymes):
P. mirabilis CF249 (TEM-24)E. coli TrCF249 (TEM-24)P. mirabilis CF39 (TEM-3)E. coliTrCF39 (TEM-3)P. mirabilis CF669 (TEM-66)E. coli TrCF669 (TEM-66)
Cefotaxime0.1212484
Cefotaxime + CAa 0.030.030.060.060.060.03
Ceftazidime4640.5884
Ceftazidime + CA0.120.250.120.250.120.12
Aztreonam0.0640.0620.252
Aztreonam + CA0.010.030.010.060.060.003
  • a CA, clavulanic acid (2 μg/ml).