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Journal of Medical Bacteriology، جلد ۱۰، شماره ۱,۲، صفحات ۲۰-۲۹
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عنوان انگلیسی Synergistic Effect of Cinnamomum camphora and Origanum vulgare Essential Oils against bla CTX-M Producing Escherichia coli Isolated from Poultry Colibacillosis
چکیده انگلیسی مقاله Background:     The transmission of antibiotic resistance through the food chain is one of the major health challenges, worldwide. A combination of essential oils with synergistic or additive effects to enhance the antimicrobial activity, is an applied approach to improve food safety. Methods:     In this study, 93 E. coli isolated from the viscera of broilers, suspected to colibacillosis, were examined for detection of ESBL by the combined disk method according to Clinical and Laboratory Standards Institute. CTX-M was detected by PCR. Antibacterial activity of cinnamon and oregano essential oils were studied against bla CTX-M harboring isolates by broth microdilution method and fractional inhibitory concentration index. Results:     According to the results of this study, 32/93 (34.4%) of tested samples produced ESBL, and 10/32 (31.2%) harbored CTX-M. All the CTX-M producing E. coli investigated by broth microdilution assay, were sensitive to cinnamon and oregano essential oils in the range of 400 to 3200 and 800 up to 1600ppm, respectively. Fractional inhibitory concentration indices ranging from 0.5 to 1.5, suggested synergistic, and additive inhibitory effect of cinnamon and oregano essential oils. Conclusion:     The results of this study indicated that bla CTX-M might be transmitted to humans through chicken meat. The combination of cinnamon and oregano can be suggested as a safe bio-preservative which leads to growth inhibition of antibiotic resistant E. coli. However, further studies should concern the potential interaction between essential oils and food matrices.  
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نویسندگان مقاله | Saba Pouyan
Student Research Committee, Faculty of Veterinary Medicine, Semnan University, Semnan, Iran.


| Khatereh Kafshdouzan
Department of Pathobiology, Faculty of Veterinary Medicine, Semnan University, Semnan, Iran


| Ashkan Jebelli
Department of Food Hygiene, Faculty of Veterinary Medicine, Semnan University, Semnan, Iran.
نشانی اینترنتی https://jmb.tums.ac.ir/index.php/jmb/article/view/444
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