TABLE 3.

MICs of β-lactams and inhibitors

StrainMIC (μg/ml)a
AMXAMCTICTCCPIPTZPFOXCTXCAZATMFEPIPM
KF92>512>512>256NT>512NT25625651240.251
HB101(pSAL-1)>512>512128NT128NT128166410.121
Kp760>256>256>256>2562568>25683280.061
C600(pKp760)>256>25612864128212843220.061
TN58647>256162562562566425646440.52
J53(pTN58647)>256644421640.12540.250.062
RDDHA>256642562562563225664256160.52
C600(pRDDHA)>25632256882322210.251
RBDHA>25632256256321625643280.254
J53(pRBDHA)>2561282563244640.12520.1250.062
JDDHA>256322562562566425643240.52
J53(pJDDHA)>25664168821280.2540.50.062
MPDHA>25632256256161640.510.50.061
TN60013>2563225625625664128864211
C600(pTN60013)>2566488411280.2540.250.061
STA1DHA>25664256256648128212840.062
DH10B(pSTA1DHA)>256128168421280.2540.250.062
TN26033>25632256128643232212840.1251
STA2DHA>2566425625664825643210.061
DH10B(pSTA2DHA)>256128256256326464162560.50.1251
IGR1DHA>2566464168412823240.062
J53(pIGR1DHA)>2563248411280.520.50.061
IGR2DHA>2566425625664812841640.062
J53(pIGR2DHA)>256324421640.2520.50.061
E. coli J53110.250.250.1250.1251<0.060.060.06<0.060.25
E. coli C600220.50.50.1250.12510.1250.250.1250.1250.25
  • a AMX, amoxicillin; AMC, amoxicillin-clavulanic acid (2 μg/ml); TIC, ticarcillin; TCC, ticarcillin-clavulanic acid (2 μg/ml); PIP, piperacillin; TZP, piperacillin-tazobactam (4 μg/ml); FOX, cefoxitin; CTX, cefotaxime; CAZ, ceftazidime; ATM, aztreonam; FEP, cefepime; IPM, imipenem; NT, not tested.