Volume 5, Issue 2 (June 2018)                   J. Food Qual. Hazards Control 2018, 5(2): 72-76 | Back to browse issues page

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Zoonosis Research Centre, Tehran University of Medical Sciences, P.O. Box: 14155-6446 Tehran, Iran , mksharifiyazdi@gmail.com
Abstract:   (1108 Views)
Background: Staphylococcus aureus, a Gram-positive bacterium, is the most prevalent   food-borne pathogen in most regions of the world. The current study was carried out with the aim of S. aureus isolation from shrimps sold in Tehran, Iran. Furthermore, the genes of mecA as indicator of methicillin-resistant S. aureus, sea, seb, and tsst encoding enterotoxins were studied in the S. aureus isolates.
Methods: Totally, 150 fresh and 150 frozen shrimp samples were collected from seafood retailers in Tehran. Isolation of S. aureus from the samples was carried out using conventional methods. The target genes were identified using polymerase chain reaction technique. Data were statistically analyzed using SPSS v. 11.5 software.
Results: Out of 150 fresh and 150 frozen samples, 84 samples (28%) were contaminated with S. aureus. The contamination rate in fresh samples (22%) was significantly (p<0.05) lower than in frozen samples (34%). Totally, prevalence rates of sea, seb, tsst, and mecA genes in the isolates were 39.3, 15.5, 4.8, and 28.6%, respectively showing significant (p<0.05) differences.  
Conclusion: High prevalence rates of enterotoxigenic and also antibiotic resistance genes in S. aureus isolated from shrimp samples in the current study highlighted worries about risk of staphylococcal food poisoning in Iranian shrimp consumers.

DOI: 10.29252/jfqhc.5.2.7
Full-Text [PDF 388 kb]   (300 Downloads)    
Type of Study: Original article | Subject: Special
Received: 17/08/04 | Accepted: 17/12/25 | Published: 18/06/23

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