The Canadian journal of infectious diseases & medical microbiology = Journal canadien des maladies infectieuses et de la microbiologie medicale · 2013
Determination of susceptibility to fosfomycin and tigecycline of Enterobacteriaceae, particularly Escherichia coli isolates, producing extended-spectrum β-lactamases from multiple regional Canadian hospitals.
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Beuk Carlee, Hill Christian, Whitehead Sue, Blondel-Hill Edith, Wagner Ken, Cheeptham Naowarat
Аннотация
BACKGROUND: The worldwide spread of extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae, particularly Escherichia coli, has significantly limited therapeutic options, especially for urinary tract infections. Although limited in their indications, fosfomycin and tigecycline are potential agents to treat infections due to ESBL-producing organisms. Although not routinely performed, susceptibility testing to both is necessary to ensure there is not an increase in resistance.
METHODS: A total of 160 isolates of ESBL-producing E coli were isolated from patients at multiple regional hospitals in the Interior Health Region of British Columbia from June 2009 to January 2012. Isolates were obtained from various body fluids and sites including urine (78.2%), wounds, blood, gall bladder drain and respiratory specimens. All isolates were tested using the E-test method (Etest, bioMérieux, France) for tigecycline and Kirby Bauer disk diffusion method for fosfomycin using European Committee of Antimicrobial Susceptibility Testing breakpoints for tigecycline and Clinical and Laboratory Standards Institute zone sizes for fosfomycin.
RESULTS: All 160 isolates were found to be susceptible to tigecycline, while five isolates (3.1%) were resistant to fosfomycin (four resistant, one intermediate).
CONCLUSION: Although resistance to these antibiotics has previously been reported, the present study confirmed that isolates of ESBL-producing E coli from the Interior Health Region of British Columbia remain highly susceptible to both tigecycline and fosfomycin.
METHODS: A total of 160 isolates of ESBL-producing E coli were isolated from patients at multiple regional hospitals in the Interior Health Region of British Columbia from June 2009 to January 2012. Isolates were obtained from various body fluids and sites including urine (78.2%), wounds, blood, gall bladder drain and respiratory specimens. All isolates were tested using the E-test method (Etest, bioMérieux, France) for tigecycline and Kirby Bauer disk diffusion method for fosfomycin using European Committee of Antimicrobial Susceptibility Testing breakpoints for tigecycline and Clinical and Laboratory Standards Institute zone sizes for fosfomycin.
RESULTS: All 160 isolates were found to be susceptible to tigecycline, while five isolates (3.1%) were resistant to fosfomycin (four resistant, one intermediate).
CONCLUSION: Although resistance to these antibiotics has previously been reported, the present study confirmed that isolates of ESBL-producing E coli from the Interior Health Region of British Columbia remain highly susceptible to both tigecycline and fosfomycin.