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Abstract
This study aimed to investigate the prevalence of foodborne pathogenic bacteria in bovine milk, their antibiogram phenotype, and the carriage of antibiotic resistance genes. Raw bovine milk samples (n = 100) were randomly collected from different suppliers in the northwest of Iran. Antibiotic-resistant patterns and the presence of antibiotic resistance genes were evaluated in the isolates. Escherichia coli, Listeria monocytogenes, Staphylococcus aureus, and Salmonella spp. were isolated from 78%, 47%, 25%, and 21% of samples, respectively. All isolates showed high rates of resistance to amoxicillin, penicillin, and cefalexin. The blaTEM and blaSHV genes were detected in 50.0% and 6.4% of E. coli isolates, respectively. Also, 28.5% and 19.0% of Salmonella isolates were positive for blaTEM and blaSHV. The frequency of mecA and blaZ in S. aureus isolates was 20.0% and 12.0%, respectively. The high prevalence of bovine milk contamination with antimicrobial-resistant species in this study necessitates precise control on antibiotic prescription in veterinary medicine.
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Details
1 University of Tabriz, Department of Food Hygiene and Aquatic, Faculty of Veterinary Medicine, Tabriz, Iran (GRID:grid.412831.d) (ISNI:0000 0001 1172 3536)
2 University of Tabriz, Department of Pathobiology, Faculty of Veterinary Medicine, Tabriz, Iran (GRID:grid.412831.d) (ISNI:0000 0001 1172 3536)
3 University of Tabriz, Department of Clinical Sciences, Faculty of Veterinary Medicine, Tabriz, Iran (GRID:grid.412831.d) (ISNI:0000 0001 1172 3536)
4 Hamadan University of Medical Sciences, Department of Tissue Engineering, School of Medicine, Hamadan, Iran (GRID:grid.411950.8) (ISNI:0000 0004 0611 9280)