Volume 10, Number 3 (7-2016)                   payavard 2016, 10(3): 220-229 | Back to browse issues page


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Soltan Dallal M M, Shojaei Zinjanab M, Vahedi S, Mahmoudi H, Ghanbarzadeh S, Hedayati Rad F. A Survey of Escherichia Coli, Enterococcus and Total Microbial Count of Packaged and Non-Packaged Fresh Vegetables in Tehran. payavard. 2016; 10 (3) :220-229
URL: http://payavard.tums.ac.ir/article-1-6054-en.html

1- Professor, Microbiology Section, Pathobiology Department, School of Public Health, Food Microbiology Research Center, Tehran University of Medical Sciences, Tehran, Iran
2- Master of Sciences Student in Division of Food Microbiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran , Maryam_shojaei60@yahoo.com
3- Instructor, Operating Room Departmen, School of Allied Medical Sciences, Tehran University of Medical Sciences, Tehran, Iran
4- Bachelor of Sciences in environmental health, Health Deputy, Tehran University of Medical Sciences, Tehran, Iran
5- Master of Sciences in Division of Food Microbiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
Abstract:   (2969 Views)

Background and Aim: Vegetables are one of the major components of food basket and consumption of them is on the rise. On the other hand, diseases and outbreaks caused by this group of foodstuffs have increasing trend. This study was performed to investigate the microbial contamination of vegetables used in south of Tehran.

Materials and Methods: Hundred fresh packaged and non packaged vegetable samples composed of 10 kinds, were examined based on the methods presented in Iran national standards. For each sample, enumeration of enterococcus and total microbial count was carried out by the pour plate technique in KF agar and plate count agar, respectively. Escherichia coli detection was also performed using lauryl sulfate broth, EC broth, peptone water and MacConkey agar mediums. Biochemical tests namely urea hydrolysis, motility, sulfide hydrogen (SH2) production, gas production and sugar fermentation were conducted as conformational tests of Escherichia coli.

Results: All (100%) of mixed leafy vegetables, spinaches, peppers, kuku (Persian food) vegetables, wheat sprouts and mung been sprouts had contamination higher than acceptable limits. In the case of green onions, basils, kuku vegetables, mushrooms and broccolis, respectively 40, 60, 30, 90 and 30 % of the samples were in contravention with acceptable limits, in terms of at least one parameter.

Conclusion: Our results show that consumption of vegetables specially those used as raw, need more attention at washing point and need to use hygienic rules of health department and health care centers, at shopping and consumption steps.

Full-Text [PDF 472 kb]   (990 Downloads)    
Type of Study: Research | Subject: Laboratory Sciences
Received: 2016/12/4 | Accepted: 2016/12/4 | Published: 2016/12/4

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