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Investigation of antibiotic resistance, virulence genes, and biofilm formation of Escherichia coli isolated from sheep feces in Shiraz industrial slaughterhouse, South of Iran | ||
| Iranian Journal of Veterinary Research | ||
| دوره 25، شماره 1 - شماره پیاپی 86، 2024، صفحه 25-32 اصل مقاله (340 K) | ||
| نوع مقاله: Full paper (Original article) | ||
| شناسه دیجیتال (DOI): 10.22099/ijvr.2024.48215.7019 | ||
| نویسندگان | ||
| Z. Naziri1؛ A. Hajihasani2؛ A. Derakhshandeh* 1 | ||
| 1Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran | ||
| 2MSc Student in Bacteriology, Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran | ||
| چکیده | ||
| Background: With the increase in human population, the consumption of livestock products such as sheep meat has also increased. Sheep are the reservoir and shedder of Escherichia coli that can be transmitted to humans. Aims: Characterization of fecal E. coli isolated from sheep in slaughterhouse. Methods: Stool specimens were collected from 30 apparently healthy sheep from different flocks in Shiraz industrial slaughterhouse. The resistance of E. coli isolates against 10 antibiotics was determined by disk diffusion method. The presence of three major extended spectrum beta-lactamase (ESBL) genes and five tetracycline resistance genes as well as seven virulence genes were investigated by polymerase chain reaction (PCR) technique. Using the microtiter plate method, the biofilm formation ability of E. coli isolates was investigated. Results: The highest frequency of resistance was to amoxicillin (100%) followed by tetracycline (25%). All E. coli isolates were susceptible to gentamicin and nitrofurantoin, and only one isolate was resistant to the tested third-generation cephalosporins. Multidrug resistance phenotype was observed in 16.7% of the isolates. blaTEM (25%) was the most prevalent ESBL gene and tetA (62.5%) was the most prevalent tetracycline resistance gene in the isolates. crl, csgA, fimH, and bcsA genes were present in all isolates, and the prevalence of papC and afa genes was 95.8% and 83.3%, respectively. In total, 62.5% of the isolates were biofilm producers. Conclusion: According to the concept of One Health, the presence of virulent antibiotic-resistant biofilm producing strains of E. coli in sheep is a risk to public health. | ||
| کلیدواژهها | ||
| Antibiotic resistance؛ Biofilm formation؛ Escherichia coli؛ Sheep؛ Virulence gene | ||
| مراجع | ||
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