Objectives: Staphylococcus aureus is one of the main causes of nosocomial infections. The hospital staff as carriers of Staphylococcus aureus have an important role in spreading it among patients. This study aimed to investigate nuc gene, as S. aureus marker and sea gene, enterotoxin A gene nasal mucosa of sari burn hospital staff. In this cross-sectional study, a nasal swab of 40 staff of Burnt hospital of Sari was collected and isolated. The S. aureus was detected by biochemical tests such as Gram stain, catalase, coagulase. Then nuc and sea genes were identified after the extraction of DNA, by PCR technique and gel electrophoresis with specific primer.Results: From the 40 strains obtained from nasal of carriers, 20 S. aureus strains were isolated, and all of them included nuc gene, while 6 samples included sea gene. Given that every 20 samples had nuc gene, therefore this gene is a strong marker for S. aureus. Also, the presence of sea genes in some samples suggested the presence of enterotoxin A in hospital staff as a healthy carrier. Also, given that hospital staffs can be carriers of Staphylococcus aureus and spreading nosocomial infections, therefore identification of the carriers to prevent the spread of infection is essential.
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