TABLE 1

MICs for the five Escherichia coli strains employed in this study

AntibioticMIC (mg/liter) for strain:
CREC01CREC02CREC03CREC04CREC05
Amikacin≥128≥128≥1286432
Levofloxacin≥64≥64≥64≥64≥64
Rifampin1632≥64≥64≥64
Polymyxin B2110.50.5
Tigecycline0.50.50.2518
Cefepime≥64≥64≥64≥64≥64
Meropenem≥6432≥6416≥64
Doripenem≥168≥164≥16
Imipenem≥32≥32≥32≥32≥32
Aztreonam≥128≥128≥128≥128≥128
Piperacillin-tazobactam≥256/4≥256/4≥256/4≥256/4≥256/4