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International Research Journal of Microbiology

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Prevalence and Antimicrobial Susceptibility of Drug Resistant Staphylococcus aureus in Raw Milk of Dairy Cattle

Abstract

Deepansh Sharma, Pradeep Kumar Sharma and Anjali Malik

The sturdy was carry out to evaluate the incidence and of multidrug resistant Staphylococcus aureus in raw milk of dairy cattle. Isolation and identification of S. aureus were performed from 4 types of cattle raw milk samples. The isolates were tested using Kirby-Bauer disk diffusion method for their antimicrobial susceptibility to 15 different antimicrobial drugs. A total of 115 milk samples from cattle were cultured for incidence of S. aureus, and 34.78% of the samples tested were from fresh cow milk, 34.78% from buffalo milk, 17.39% from goat milk and 13.04% from sheep milk samples. S. aureus was isolated from a total of 25 (21.73%) of the 115 samples. Almost 80-90% of the isolates were showed multiple drug resistance to majority of the antimicrobial agents tested. Several isolates from milk samples were found resistant to Nalidixic acid, Amoxycillin+sulbactam, Cloxacillin, Erythromycin, Kanamycin and Vancomycin. On the other hand several isolates were found susceptible to the Ofloxacin, Ampicillin, Tetracycline Oxacillin, Streptomycin, Sulphafurazole and Ciprofloxacin. The present study provides preliminary information on incidence of antibiotic resistant S. aureus as milk contaminants which may act as vehicles for the transmission of drug resistance in food.

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