Susceptibility of Nitrofurantoin and Fosfomycin Against Outpatient Urinary Isolates of Multidrug-Resistant Enterococci over a Period of 10 Years from India.

07:00 EST 2nd December 2019 | BioPortfolio

Summary of "Susceptibility of Nitrofurantoin and Fosfomycin Against Outpatient Urinary Isolates of Multidrug-Resistant Enterococci over a Period of 10 Years from India."

With the increasing emergence of drug resistance in enterococci, there have been very limited data on the efficacy of orally available nitrofurantoin and fosfomycin on enterococci causing urinary tract infections (UTIs), particularly for multidrug-resistant (MDR) strains. This study aimed to determine the effectiveness of these two drugs against the MDR enterococci. A total of 514 phenotypically and genotypically confirmed isolates of enterococci (239, 46.5% and 275, 53.5% ) showed as significantly more resistant ( < 0.05) to ciprofloxacin and high strength gentamicin. Vancomycin resistance was seen in 37 (7.2%) isolates. Of these, 114 (22.18%) isolates (51, 44.73% and 63, 55.26% ) were MDR. Nitrofurantoin minimum inhibitory concentrations (MICs) for the MDR enterococci varied from 1 to 128 μg/mL (MIC 8 μg/mL, MIC 64 μg/mL for ), while fosfomycin MICs for the MDR , including vancomycin resistant enterococci (VRE) were in susceptible range (≤64 μg/mL, MIC 8 μg/mL, MIC 16 μg/mL). An efficacy ratio of ≥8 for nitrofurantoin was observed in the 39 (76.5%) MDR and 44 (69.8%) MDR isolates as against the 50 (98%) isolates for fosfomycin. Although nitrofurantoin has been widely prescribed for the treatment of UTIs for the past several years, it was still found to be active against the urinary isolates of MDR enterococci, including VRE. As for fosfomycin, it holds robust potential to be used against the urinary MDR enterococci and VRE ().


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This article was published in the following journal.

Name: Microbial drug resistance (Larchmont, N.Y.)
ISSN: 1931-8448


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