TABLE 1.

MICs determined with the Etest for the outbreak strain (three representative isolates), E. coli XL-1 Blue MRF′ containing vector pBC SK(+), and E. coli XL-1 Blue MRF′ containing vector pBC SK(+) with recombinant phagemid pARL98-3

AntibioticMIC (μg/ml)
Outbreak strainpBC SK(+)pARL98-3 (blaIMP-7)
Imipenem>320.250.25
Meropenem>320.0120.125
Ampicillina432
Aztreonam160.250.125
Cefoxitin16>256
Cefpirome0.1251.0
Ceftazidime>2560.25>256
Piperacillin8–1611
Cefepime>32
Piperacillin-tazobactam8–16
Tobramycin64–128
Amikacin32
Ciprofloxacin>32
  • a —, not done.