Table 3: Antimicrobial susceptibility profile for the 2 Escherichia coli isolates that tested positive for MCR-1
AntimicrobialIsolate from OntarioIsolate from British Columbia
MIC, µg/mLInterpretationMIC, µg/mLInterpretation
Amoxicillin-clavulanate> 32Resistant4Susceptible
Cefazolin8Resistant2Susceptible
Ceftazidime0.5Susceptible0.5Susceptible
Ceftriaxone 0.25Susceptible 0.25Susceptible
Ciprofloxacin> 16Resistant0.5Susceptible
Colistin16Resistant4Resistant
Gentamicin32Resistant 0.5Susceptible
Meropenem 0.03Susceptible 0.03Susceptible
Piperacillin-tazobactam16Susceptible2Susceptible
Trimethoprim-sulfamethoxazole> 8Resistant 0.12Susceptible