Objective of this study was to determine the prevalence rate of antimicrobial resistance of S. aureus isolated from dairy cow, sheep and goat milk in Iran. From September 2010 to September 2011, a total of 348 raw milk samples from cow, sheep and goat were collected from randomly selected herds in Fars, Chahar Mahal va Bakhtiari and Ghom, provinces, Iran. Overall, 46 raw milk samples (13.2%) were found to be contaminated with S. aureus. Susceptibilities of the isolates were determined for 11 antimicrobial drugs using the disk diffusion assay. Most of the isolates (82.6%) were resistant to one or more antimicrobial agent. Six isolates (13.0%) were resistant to single antibiotic and 16 isolates (34.8%) showed resistance to 2 antimicrobial agents. Multiresistance was found in 34.8% of S. aureus isolates. Resistance (resistance and intermediate resistance) to ampicillin was the most common finding (54.3%), followed by resistance to oxacillin (28.3%), tetracycline (26.1%), penicillin G (23.9%), erythromycin (23.9%), trimethoprim-sulfamethoxazole (17.4%) and cephalotin (2.2%). All isolates tested for antibiotic sensitivity were susceptible to methicillin, vancomycin, chloramphenicol and ciprofloxacin. Furthermore, impacts and dynamics of genetic antibiotic determinants should also be investigated using molecular methods.
کلید واژگان :Antimicrobial Resistance Cow Sheep Goat Milk Staphylococcus aureus
ارزش ریالی : 1200000 ریال
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