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The major causative bacteria of food poisoning were Salmonella spp. (35.6%), Staphylococcus aureus (11.3%) and Vibrio parahaemolyticus (3.2%) in our country. In this study we attempted isolation of S. aureus from stools of patients with diarrhea. Sixty-four strains (9.1%) were isolated from 704 the stools of patients with diarrhea. The enterotoxin was detected from 29 isolates (45.3%); 24 isolates (37.5%), 3 isolates (4.7%) and 2 isolates (3.1%) were A, B and C type, respectively. In the antibiotic susceptibility, 63 isolates (98.4%) were resistant to penicillin, 60 isolates (93.8%) to ampicillin, 35 isolates (54.7%) to erythromycin, 32 isolates (50.0%) to gentamycin, 22 isolates (34.4%) to tetracycline and 20 isolates (31.3%) to oxacillin. All of S. aureus isolates were susceptible to chloramphenicol and vancomycin, 20 isolates (31.3%) were methicillin-resistance S. aureus (MRSA). MRSA isolation rate was higher in male (35.7%) than female (26.3%). With the exception of two isolates which were resistant only to penicillin, sixty-one isolates were multiple antibiotic resistance.
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