Molecular Characterization and Antibiotic Resistance Profile of Methicillin-Resistant Staphylococcus aureus (MRSA) Strains Isolated From Milk Samples of Apparently Healthy Cattle in Hamedan, Iran
Publish Year: 1402
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JCMI-10-1_002
تاریخ نمایه سازی: 14 آذر 1402
Abstract:
Background: Staphylococcus aureus, as a major food-borne pathogen, is the most commonly isolated
bacterium from bovine mastitis. However, some S. aureus strains exhibit a high rate of antibiotic resistance,
among which, methicillin-resistant S. aureus (MRSA) is very important. The present study was conducted
to isolate, characterize, and determine the antibiotic resistance profile of MRSA strains in milk.
Methods: Staphylococcus aureus strains were isolated and identified from ۴۱۵ milk samples collected
from apparently healthy cattle in Hamedan province, Iran. Molecular characteristics of the strains were
identified using multiplex polymerase chain reaction (PCR) and the antibiotic resistance profile of the
isolates was determined by Kirby-Bauer disk diffusion susceptibility test.
Results: A total of ۷۶ S. aureus strains were isolated and identified. The PCR results indicated that ۵۰
(۶۵.۷۸%) isolates possessed mecA gene and were found to be MRSA strains. Twelve isolates (۱۵.۷۸%)
showed phenotypic resistance to oxacillin in disk diffusion method. All ۷۶ S. aureus isolates (۱۰۰%) were
resistant to penicillin and susceptible to ciprofloxacin and gentamicin.
Conclusion: The results of the present study indicated that bovine milk may contain MRSA strains and this
is worrying as these isolates may transfer multi-drug resistance to the isolates that circulate among humans,
animals, and food chains.
Keywords:
Authors
Hossein Ghaderi
Department of Pathobiology, Faculty of Veterinary Science, Bu-Ali Sina University, Hamedan, Iran
Abdolmajid Mohammadzadeh
Department of Pathobiology, Faculty of Veterinary Science, Bu-Ali Sina University, Hamedan, Iran
Mohamadreza Pajohi-alamoti
Department of Food Hygiene and Quality Control, Faculty of Veterinary Science, Bu-Ali Sina University, Hamedan, Iran
Ali Sadeghi-nasab
Department of Clinical Sciences, Faculty of Veterinary Science, Bu-Ali Sina University, Hamedan, Iran