Successful Therapy of a Multidrug-Resistant Extended-Spectrum β-Lactamase–Producing and Fluoroquinolone-Resistant Salmonella enterica Subspecies enterica Serovar Typhi Infection Using Combination Therapy of Meropenem and Fosfomycin

Abstract

We report a traveler who acquired a Salmonella enterica subspecies enterica serovar Typhi strain with resistance against β-lactams, cephalosporins (extended-spectrum β-lactamase–producing type SHV-12), and quinolones (plasmid-mediated quinolone resistance gene qnrB7). After clinical deterioration using meropenem monotherapy, treatment success was achieved after commencement of fosfomycin in conjunction with high-dose meropenem. The case illustrates clinical challenges of multidrug-resistant S. Typhi.

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