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Isolation and characterization of Staphylococcus aureus from raw cow milk in Bangladesh

Mueena Jahan, Marzia Rahman, Md. Shafiullah Parvej, Shah Md. Ziqrul Haq Chowdhury, Md. Enamul Haque, Md. Abdul Khaleque Talukder, Sultan Ahmed.

Cited by (3)

Abstract
The study was intended for identification and characterization of Staphylococcus aureus isolated from raw cow milk. A total of 47 milk samples were collected from Sheshmore, Shutiakhali and Bangladesh Agricultural University Dairy Farm, Mymensingh. Using bacteriological, biochemical and PCR-based identification schemes, 12 (25.53%) isolates were confirmed as S. aureus. All the isolates showed β-hemolysis on 5% sheep blood agar. S. aureus specific nuc gene (target size 279-bp) was amplified in the cases of all isolates. The isolates were found as resistant to Penicillin (100%), Erythromycin (75%) and Amoxicillin (100%). On the other hand, the isolates were sensitive to Ciprofloxacin (83.33%), Oxacillin (100%), Cloxacillin (100%) and Neomycin (100%). The isolated S. aureus showed increased resistance to broad spectrum antibiotic (e.g., Ciprofloxacin). As many people have a tendency to drink raw milk and raw milk products, there is high risk of S. aureus infection in human.

Key words: Staphylococcus aureus, Methicillin resistance, nuc gene, mecA gene



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