Impact of the MIC of Piperacillin-Tazobactam on the Outcome of Patients with Bacteremia Due to Extended-Spectrum-β-Lactamase-Producing Escherichia coli

Author:

Retamar Pilar,López-Cerero Lorena,Muniain Miguel Angel,Pascual Álvaro,Rodríguez-Baño Jesús,

Abstract

ABSTRACTWe investigated the impact of the piperacillin-tazobactam MIC in the outcome of 39 bloodstream infections due to extended-spectrum-β-lactamase-producingEscherichia coli. All 11 patients with urinary tract infections survived, irrespective of the MIC. For other sources, 30-day mortality was lower for isolates with a MIC of ≤2 mg/liter than for isolates with a higher MIC (0% versus 41.1%;P= 0.02).

Publisher

American Society for Microbiology

Subject

Infectious Diseases,Pharmacology (medical),Pharmacology

Reference8 articles.

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3. European Committee on Antimicrobial Susceptibility Testing. 2013. Breakpoint tables for interpretation of MICs and zone diameters, version 3.1. http://www.eucast.org/fileadmin/src/media/PDFs/EUCAST_files/Breakpoint_tables/Breakpoint_table_v_3.1.pdf.

4. European Committee on Antimicrobial Susceptibility Testing. 2013. MIC and inhibition zone diameter distributions of microorganisms without and with resistance mechanisms. http://mic.eucast.org/Eucast2/.

5. Impact of inadequate empirical therapy on the mortality of patients with bloodstream infections: a propensity score-based analysis;SAEI/SAMPAC Bacteremia Group;Antimicrob. Agents Chemother,2012

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