Activity of ticarcillin/clavulanate and piperacillin/tazobactam (YTR 830; CL-298,741) against clinical isolates and against mutants derepressed for class I beta-lactamase.

Abstract excerpt

Piperacillin/tazobactam (YTR 830; CL-298,741) was tested against fresh and stock clinical isolates of Gram-negative bacilli, as well as against Gram-negative bacilli that had stably derepressed Class I beta-lactamases or that were hyperproductive of non-Class I beta-lactamases. Of 63 clinical isolates of the Enterobacteriaceae with ticarcillin (plus clavulanate) minimum inhibitory concentrations (MICs) of greater...

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