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. 2012 Apr 12;7(4):e34752. doi: 10.1371/journal.pone.0034752

Table 1. MICs of ß-lactams for E. coli clinical isolate Gue, E. coli J53 pGUE-NDM and E. coli J53 reference strains.

β-lactams MIC (µg/ml)
E. coli isolate GUE E. coli J53 pGUE-NDM E. coli J53
Amoxicillin >256 >256 4
Amoxicillin + CLAa 256 >256 4
Ticarcillin >256 >256 2
Ticarcillin + CLAa 256 256 2
Cephalothin >256 >256 4
Cefotaxime 128 128 0.06
Ceftazidime >256 >256 0.06
Cefepime 32 32 0.03
Aztreonam 0.125 0.06 0.06
Meropenem 2 0.75 0.03
Ertapenem 3 0.5 0.03
Doripenem 1.5 0.5 0.03
Imipenem 3 1.5 0.12
a

CLA; clavulanic acid (4 µg/ml) TZB.