Applied Microbiology

Our research has been executed for antibiotic resistance of Staphyloccus aureus isolated from food. 80 samples of raw milk and from some local markets 100 samples of cheese, 100 samples of chicken meat were collected. Antibiotic resistances and betalactamase activities of S. aureus stains were determined by comparing them between each other. In our research totally 280 food samples were examined. The strains of which were isolated from 80 different raw milk samples were found resistant to 70% penicillin,1.3% oxacillin, 6.3% erythromycin, 7.5% clindamycin and 1.3% trimetoprim/sulfamethoxasol. The strains of S. aureus which were isolated from 100 different cheese samples were found resistant to 67% penicillin, 2% oxacillin, 7% erythromycin, 8% clindamycin, 2% gentamycin and 2% trimetoprim/sulfamethoxasol. The strains of S. aureus which were isolated from 100 different chicken meat samples were found resistant to 82% penicillin, 3% oxacillin, 8% erythromycin, 9% clindamycin and 2% gentamycin. If we evaluate all food samples together, were observed that, the strains of S. aureus were found resistant to 73.2% penicillin, 2.1% oxacillin, 7.1% erythromycin, 8.2% clindamycin, 1.4% gentamycin and 1.1% trimetoprim/sulfamethoxasol. From beta-lactamase ratios point ofview, in 280 food samples 134 (76.4%) of them were found positive. The current situation of antibiotic resistance and the possible

precautions were discussed out of precautions for minimizing possible risks of S. aureus.