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Activity of Cefepime-Zidebactam against Multidrug-Resistant (MDR) Gram-Negative Pathogens
Kenneth S Thomson1, Sameh AbdelGhani2,3, James W Snyder4
1Department of Pathology and Laboratory Medicine, School of Medicine, University of Louisville, Louisville, KY 40202, USA. kenneth.thomson@louisville.edu.
Abstract:
This study compared the activity of cefepime + zidebactam (FEP-ZID) and selected currently available antibacterial agents against a panel of multidrug-resistant (MDR) clinical isolates chosen to provide an extreme challenge for antibacterial activity. FEP⁻ZID had a very broad and potent in vitro spectrum of activity, and was highly active against many MDR isolates of Enterobacterales, Pseudomonas aeruginosa, and Acinetobacter baumannii. Notably, it inhibited isolates producing carbapenemases of Ambler classes A, B, and D, and P. aeruginosa isolates with multiple resistance mechanisms including combinations of upregulated efflux, diminished or non-functional OprD porins, and AmpC overproduction. Its clinical role will be determined initially by the breakpoints assigned to it, comparison studies with other investigational β-lactamase inhibitor combinations, and ultimately by the developing body of therapeutic outcome data.
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