Abstract
Aim: The aim of this research was to study the prevalence and antibiotic resistance of S. aureus in the Bastar region. Material and Method: From the clinical samples cultured from Jan 2010 to May 2012, 916 S. aureus isolates were identified by the standard tests. Screening of MRSA was done by oxacillin screen agar and cefoxitin disk diffusion tests. Antibiotic susceptibility was examined by Kirby-Bauer disk diffusion test. For MIC of vancomycin and linezolid, Etest was performed. Result: Of the isolates, 34.8% were MRSA. In the MRSA isolates, 63% (165) were found resistant to erythromycin, 39.3% (103) to azithromycin, 61.8% (162) to clindamycin, 81.5% (260) to cotrimoxazole, 0.6% (2) to linezolid, 0.9% (3) to vancomycin, 76.5% (244) to tetracycline, 67.7% (216) to gentamycin, 63.3% (202) to ciprofloxacin, 8.5% (27) to gatifloxacin, 16.4% (43) to chloramphenicol, 68.4% (39) to norfloxacin, 12.3% (7) to nitrofurantoin, 80.7% (46) to sulfisoxazole, and 80.7% (46) to trimethoprim antibiotics. Discussion: The study was conducted first time from this region. The prevalence and drug resistance percentage is compared with other studies. Emergence of linezolid resistance and relatively higher vancomycin resistance in the MRSA isolates is a worrisome finding of this study. Cotrimoxazole and/or gentamycin may be considered as initial empiric treatment, but must be replaced immediately with the correct antibiotic according to the antibiogram.