Evaluation of fosfomycin, furazidin, and gentamicin impact on growth of uropathogenic ESBL-producing Escherichia coli
DOI:
https://doi.org/10.21164/pomjlifesci.1077Słowa kluczowe:
fitness cost, extended-spectrum β-lactamase, urinary tract infection, Escherichia coli, antimicrobialsAbstrakt
Introduction: Urinary tract infections are a prevalent health issue, significantly impacting both patient well-being and healthcare systems. The rise of antibiotic resistance, particularly among Gram– bacilii, complicates treatment protocols. This study assesses the inhibitory effect of 3 antimicrobials – fosfomycin, furazidin, and gentamicin – against both wild-type and extended-spectrum β-lactamase (ESBL)-producing uropathogenic Escherichia coli clinical strains.
Materials and methods: Sixty E. coli isolates (30 ESBL-producing and 30 wild-type) were collected from clinical urine samples. Identification and antimicrobial susceptibility were assessed using MALDI-TOF MS and VITEK 2 systems. Growth inhibition by antibiotics was measured in Mueller-Hinton broth at optical density 600 nm over 24 h. Extended-spectrum β-lactamase genes were identified via polymerase chain reaction targeting blaCTX-M, blaSHV, blaTEM, blaPER, blaVEB and blaGES genes. Statistical analysis was performed using the Friedman test with Dunn’s correction.
Results: Fosfomycin exhibited significant growth inhibition against both wild-type and ESBL-producing E. coli, particularly those harboring blaCTX-M genes. Furazidin and gentamicin were effective against wild-type strains but not against ESBL producers. Statistically significant inhibition for wild-type strains was observed with fosfomycin (p = 0.004), furazidin (p = 0.007), and gentamicin (p = 0.008). For ESBL producers, significant inhibition was noted only with fosfomycin (p < 0.001).
Conclusions: Fosfomycin shows strong efficacy against both wild-type and ESBL-producing E. coli, suggesting its potential as a first-line treatment for urinary tract infections amidst rising antibiotic resistance. Furazidin and gentamicin, while effective against wild-type strains, are less effective against ESBL-producing strains, underscoring the need for targeted antibiotic use. Further research is recommended to validate these findings and optimize clinical treatment guidelines.
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