Monitoring Ceftazidime-Avibactam and Aztreonam Concentrations in the Treatment of a Bloodstream Infection Caused by a Multidrug-Resistant Enterobacter sp. Carrying Both Klebsiella pneumoniae Carbapenemase-4 and New Delhi Metallo-β-Lactamase-1.

Yasmin, Mohamad; Fouts, Derrick E; Jacobs, Michael R; Haydar, Hanan; Marshall, Steven H; White, Richard; D'Souza, Roshan; Lodise, Thomas P et al. · Clin Infect Dis · 2020

case_report · Level V

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Abstract

In an infection with an Enterobacter sp. isolate producing Klebsiella pneumoniae Carbapenemase-4 and New Delhi Metallo-β-Lactamase-1 in the United States, recognition of the molecular basis of carbapenem resistance allowed for successful treatment by combining ceftazidime-avibactam and aztreonam. Antimicrobial synergy testing and therapeutic drug monitoring assessed treatment adequacy.

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