Table 1.

β-Lactam MICs for TEM-producingP. mirabilis strains

β-LactamMIC (μg/ml) for the following strains (enzymes):
CF19 (TEM-1)CF29 (TEM-2)CF579 (TEM-57)
Amoxicillin5124,0964,096
Amoxicillin + CAa 41616
Ticarcillin128512512
Ticarcillin + CA222
Piperacillin8256256
Piperacillin + TAZb 0.511
Cephalothin888
  • a CA, clavulanic acid (2 μg/ml).

  • b TAZ, tazobactam (4 μg/ml).