COMPARATIVE STUDY
JOURNAL ARTICLE

Clinical correlation of the CLSI susceptibility breakpoint for piperacillin- tazobactam against extended-spectrum-beta-lactamase-producing Escherichia coli and Klebsiella species

Patrick J Gavin, Mira T Suseno, Richard B Thomson, J Michael Gaydos, Carl L Pierson, Diane C Halstead, Jaber Aslanzadeh, Stephen Brecher, Coleman Rotstein, Stephen E Brossette, Lance R Peterson
Antimicrobial Agents and Chemotherapy 2006, 50 (6): 2244-7
16723596
We assessed infections caused by extended-spectrum-beta-lactamase-producing Escherichia coli or Klebsiella spp. treated with piperacillin-tazobactam to determine if the susceptibility breakpoint predicts outcome. Treatment was successful in 10 of 11 nonurinary infections from susceptible strains and in 2 of 6 infections with MICs of >16/4 mug/ml. All six urinary infections responded to treatment regardless of susceptibility.

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