Antibiotic policy and prescribing strategies for therapy of extended-spectrum beta-lactamase-producing Enterobacteriaceae: the role of piperacillin-tazobactam

L R Peterson
Clinical Microbiology and Infection 2008, 14 Suppl 1: 181-4
Therapy of infections caused by extended-spectrum beta-lactamase (ESBL)-producing bacteria with an antimicrobial to which they are resistant results in treatment failure, higher cost and increased mortality. The CLSI recommends reporting ESBL-producing strains of Escherichia coli, Klebsiella spp. and Proteus spp. as resistant to all penicillin, true cephalosporin and monobactam antimicrobials, but as susceptible to beta-lactam-beta-lactamase inhibitor combinations, including piperacillin-tazobactam, when they test as such. Current literature supports the action of piperacillin-tazobactam against susceptible strains of ESBL-producing bacteria based on the structure-activity relationship between inhibitors and the ESBLs, as well as on recent clinical outcome studies.

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