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Determination of genetic relationship among Staphylococcus aureus isolates is important for epidemiological surveillance and control of infections caused by this bacterium. The present study was conducted to determine the molecular diversity of S. aureus strains isolated from human, bovine, and food samples using random amplified polymorphic DNA (RAPD)-PCR method. A total of 208 S. aureus strains including 60 human (patients and healthy carriers), 83 bovine milk, and 65 food (pastry and cheese) isolates were assessed. The isolates were confirmed to be methicillin-resistance/susceptible S. aureus (MRSA or MSSA) using common biochemical tests and a species-specific PCR, and finally, they were genetically typed using RAPD-PCR method. Forty-seven RAPD profiles (13, 21, and 15 profiles for isolates from human, bovine, and food samples, respectively) were identified in the examined isolates …