Oral fosfomycin for treatment of urinary tract infection: a retrospective cohort study
Abstract
BackgroundFosfomycin is increasingly called upon for the treatment of multi drug-resistant (MDR) organisms causing urinary tract infection (UTI). We reviewed oral fosfomycin use for UTI treatment in a large UK hospital. The primary goal was to audit our clinical practice against current national guidelines. Secondary aims were to identify factors associated with treatment failure, and to investigate the potential for using fosfomycin in patients with co-morbidities.MethodsWe retrospectively studied 75 adult patients with UTI who received 151 episodes of treatment with fosfomycin from March 2013 to June 2015. We collected clinical data from our electronic patient record, and microbiology data pre- and post- fosfomycin treatment. We recorded additional data for patients receiving prolonged courses in order to make a preliminary assessment of safety and efficacy. We also reviewed >18,000 urinary tract isolates of Escherichia coli and Klebsiella spp. processed by our laboratory over the final year of our study period to determine the prevalence of fosfomycin resistance.ResultsThere was a significant increase in fosfomycin treatment episodes over the course of the study period. Co-morbidities were present in 71 % of patients. The majority had E. coli infection (69 %), of which 59 % were extended spectrum beta-lactamase (ESBL)-producers. Klebsiella infections were more likely than E. coli to fail treatment, and more likely to be reported as fosfomycin resistant in cases of relapse…
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