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Translational Efficacy of Humanized Exposures of Cefepime, Ertapenem, and Levofloxacin against Extended-Spectrum-β-Lactamase-Producing Escherichia coli in a Murine Model of Complicated Urinary Tract Infection

ABSTRACT Validated animal models are required as bridging tools to assess the utility of novel therapies and potential microbiologic outcomes. Herein, we utilized uropathogenic extended-spectrum-β-lactamase (ESBL)-producing and non-ESBL-producing Escherichia coli in the neutropenic murine complicated urinary tract infection (cUTI) model with humanized exposures of cefepime, ertapenem, and levofloxacin to assess its translational value to human outcomes. Our data support the translational utility of this murine model to cUTI in humans as humanized exposures produced microbiologic outcomes consistent with the phenotypic profiles of the organisms.