Volume 13, Issue 2 (Jun & Jul 2019)                   payavard 2019, 13(2): 92-100 | Back to browse issues page

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1- Professor, Food Microbiology Research Center, Pathobiology Department, Microbiology Division, Faculty of Public Health, Tehran University of Medical Sciences, Tehran, Iran , soltanda@tums.ac.ir
2- Master of Science in Food Microbiology, Faculty of Public Health, Tehran University of Medical Sciences, Tehran, Iran
3- Professor, Zoonosis Research Centre, Medical Laboratory Sciences Department, Faculty of Allied Medical Sciences, Tehran University of Medical Sciences, Tehran, Iran
4- Master of Science in Food Microbiology Research Center, Tehran University of Medical Sciences, Tehran, Iran
5- Assistant Professor, Food and Hygiene Control Laboratory, Yazd Shahid Sadoughi University of Medical Sciences, Yazd, Iran
Abstract:   (251 Views)
Background and Aim: The variety of sweets along with significant difference level of hygiene in the production, supplies and high potential contamination of sweets ingredients with Escherichia coli, led to investigate the frequency of broad-spectrum beta lactamase strains of E. coli in sweets and determine the presence of SHV, TEM and CTX-M genes.
Material and methods: In this descriptive cross-sectional study, 150 confectionery samples were collected from traditional confectionery workshops in Yazd. Detection of E. coli strains was carried out by standard biochemical tests and antibiotic susceptibility test was performed using CLSI guidelines. Via combined ESBL disk method on the muller hinton agar medium producing strains were identified. All the ESBL producing strains were evaluated using the PCR test for the existence of SHV, TEM and CTX-M genes.
Results: In 30 isolates, (20%) E.coli was obtained. The results of antibiotic susceptibility test showed that the highest and the lowest antibiotic resistance was related to chloramphenicol l (22 isolates, 73.3%) and Imipenem (8 isolates, 26.6%). The results of the combined disk test was showed that only 9 isolates produced ESBL. The molecular analysis on considered genes indicated that 2, 4 and 3 isolates were positive for presence of TEM, SHV, and CTX-M genes, respectively.
Conclusion: The prevalence of antibiotic-resistant isolates in traditional Yazd sweets in this study highlights the importance of more observing and control measures in the preparation and distribution of sweets.
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Type of Study: Research | Subject: Laboratory Sciences
ePublished: 2019/07/21