Abstract
ABSTRACT Background Multidrug-resistant Enterobacter strains that harbour Klebsiella pneumoniaecarbapenemase and Extended Spectrum β-Lactamases genes are a therapeuticchallenge in hospitals that have made infection control and antibiotic therapydifficult and use of natural compounds such as thymol is interesting in thetreatment of infections. Methods Sixty-seven Enterobacter spp. isolates were obtained from patients admittedto hospitals in Hamadan and Tehran. Antimicrobial susceptibility, ESBLs andKPC genes detection and biofilm production of isolates were measured. Findings The results showed that the highest and lowest antibiotic resistance wererelated to ceftazidime (82.1%) and tigecycline (3%), respectively. Also, 79.1% of the isolates were MDR. The highestpresence of genes was related to TEM (100%), SHV (82%), CTX-M(77%) and KPC (8.96%) genes. The MICand MBIC of thymol were obtained 8-31 μg/ml and16-62 μg/ml, respectively. Conclusion Use of thymol, as an aid in antibiotic therapy is recommended.
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