A Mahfoozi1, H Shirzad-Aski2, H Kaboosi3, E A Ghaemi4. 1. Graduated from Biology Department, Damghan Branch, Islamic Azad University, Damghan, Iran. 2. Infectious Diseases Research Center, Golestan University of Medical Sciences, Gorgan, Iran. 3. Department of Microbiology, College of Microbiology, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran. 4. Food, Drug, and Natural Products Health Research Center, School of Medicine, Golestan University of Medical Sciences, Gorgan, Iran.
Abstract
BACKGROUND: An annual update of information about the prevalence of Staphylococcus aureus and staphylococcal enterotoxins (SEs) genes is required in every geographic area. AIMS: This study was conducted to investigate the prevalence of the bacterium and type of associated enterotoxin genes in different food samples, using multiplex polymerase chain reaction (PCR) assay. METHODS: In order to achieve these goals, 310 samples, divided into three groups (dairy products, meat, and traditional sweets groups), were collected. After determination of the prevalence of S. aureus, the existence of 16s rRNA, sea, seb, sec, sed, and see genes were evaluated using multiplex PCR assay. RESULTS: Staphylococcus aureus was isolated from 103 (33%) samples. Furthermore, the meat category had the most contamination rate of S. aureus. Additionally, the kebab samples (61.5%) were the most contaminated products, followed by hamburger (47.3%), and ice cream (33.8%). Of these 103 S. aureus isolates, 72 isolates (69.9%) harbored at least one type of the classical SEs genes. The prevalence of the type A enterotoxin gene was detected higher than the other SEs genes. CONCLUSION: The results indicated that inappropriate handling of the samples in the preparation and processing steps, especially for the meat products, can lead to the spread of more bacteria. The relatively high prevalence of some classical enterotoxin genes in the isolates revealed the potential power of this bacterium to produce enterotoxins, which can lead to food-poisoning.
BACKGROUND: An annual update of information about the prevalence of Staphylococcus aureus and staphylococcal enterotoxins (SEs) genes is required in every geographic area. AIMS: This study was conducted to investigate the prevalence of the bacterium and type of associated enterotoxin genes in different food samples, using multiplex polymerase chain reaction (PCR) assay. METHODS: In order to achieve these goals, 310 samples, divided into three groups (dairy products, meat, and traditional sweets groups), were collected. After determination of the prevalence of S. aureus, the existence of 16s rRNA, sea, seb, sec, sed, and see genes were evaluated using multiplex PCR assay. RESULTS: Staphylococcus aureus was isolated from 103 (33%) samples. Furthermore, the meat category had the most contamination rate of S. aureus. Additionally, the kebab samples (61.5%) were the most contaminated products, followed by hamburger (47.3%), and ice cream (33.8%). Of these 103 S. aureus isolates, 72 isolates (69.9%) harbored at least one type of the classical SEs genes. The prevalence of the type A enterotoxin gene was detected higher than the other SEs genes. CONCLUSION: The results indicated that inappropriate handling of the samples in the preparation and processing steps, especially for the meat products, can lead to the spread of more bacteria. The relatively high prevalence of some classical enterotoxin genes in the isolates revealed the potential power of this bacterium to produce enterotoxins, which can lead to food-poisoning.
Authors: Dinidu S Wijesurendra; Anthony Neal Chamings; Rhys Nathan Bushell; Denise O' Rourke; Mark Stevenson; Marc Serge Marenda; Amir H Noormohammadi; Andrew Stent Journal: Avian Pathol Date: 2017-08-16 Impact factor: 3.378
Authors: M A Argudín; M C Mendoza; M A González-Hevia; M Bances; B Guerra; M R Rodicio Journal: Appl Environ Microbiol Date: 2012-02-10 Impact factor: 4.792
Authors: Ana G Abril; Tomás G Villa; Jorge Barros-Velázquez; Benito Cañas; Angeles Sánchez-Pérez; Pilar Calo-Mata; Mónica Carrera Journal: Toxins (Basel) Date: 2020-08-20 Impact factor: 4.546