High Rates of Nonsusceptibility to Ceftazidime-avibactam and Identification of New Delhi Metallo-β-lactamase Production in Enterobacteriaceae Bloodstream Infections at a Major Cancer Center

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Resistance to the novel β-lactam/β-lactamase inhibitor combination ceftazidime-avibactam (CAZ-AVI) among carbapenem-resistant Enterobacteriaceae (CRE) has infrequently been reported in the United States. We report unexpectedly high rates of resistance to CAZ-AVI in CRE bloodstream isolates at our institution associated with the nonoutbreak spread of New Delhi metallo-β-lactamase in diverse Enterobacteriaceae species.

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