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Volume 13, Number 2—February 2007

Dispatch

Ertapenem Resistance of Escherichia coli

Marie-Frédérique Lartigue*, Laurent Poirel*, Claire Poyart†, Hélène Réglier-Poupet†, and Patrice Nordmann*Comments to Author 
Author affiliations: *Université Paris XI, Kremlin-Bicêtre, France; †Université Paris V, Paris, France;

Main Article

Table

MICs of β-lactam antimicrobial drugs for Escherichia coli CO, transconjugants pCO-1 and pCO-2, and reference strain E. coli J53*

β-lactamMIC (mg/L)
E. coli COTransconjugant pCO-1 (CTX-M-2)Transconjugant pCO-2 (OXA-10, TEM-1)E. coli J53
Amoxicillin>256>256>2562
Amoxicillin + CLA>2568642
Ticarcillin>256>256>2562
Ticarcillin + CLA>256321282
Piperacillin>256>256641
Piperacillin + TZB2562321
Cephalotin>256>25644
Cefoxitin256444
Ceftazidime6440.060.06
Ceftazidime + CLA10.1250.060.06
Cefotaxime>256640.060.06
Cefotaxime + CLA12810.060.06
Cefepime>256160.060.06
Moxalactam1280.060.060.06
Aztreonam>256320.060.06
Imipenem80.250.250.25
Meropenem80.060.060.06
Ertapenem>2560.030.030.03

*CLA, clavulanic acid at a fixed concentration of 2 mg/L; TZB, tazobactam at a fixed concentration of 4 mg/L..

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