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首页> 外文期刊>African Journal of Biotechnology >Isolation and genomic characterization of Escherichia coli O157:NM and Escherichia coli O157:H7 in minced meat and some traditional dairy products in Iran
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Isolation and genomic characterization of Escherichia coli O157:NM and Escherichia coli O157:H7 in minced meat and some traditional dairy products in Iran

机译：伊朗碎肉和某些传统乳制品中大肠杆菌O157：NM和大肠杆菌O157：H7的分离和基因组表征

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Human diseases caused by?Escherichia coli?O157:NM and?E. coli?O157:H7 strains have been reported throughout the world. In developed countries, serotype O157:H7 represents the major cause of human diseases; however, there have been increasing reports of non-O157 Shiga toxin (Stx)-producing?E. coli?strains associated with gastrointestinal infections. The present study was conducted to investigate the presence of?E. coli?O157 and?E. coli?O157: H7 strains and the presence of virulence genes?stx1,?stx2,?eaeA?and?ehlyA?insolates derived from some traditional dairy products and minced beef meat. A total?number?of 201 samples including 50 samples from traditional butter, 50 samples from traditional cream, 35 samples from kashk, 30 samples from doogh and 36 samples from minced beef meat were purchased in different supermarkets and retailer shops in Isfahan, Chaharmahal, Bakhtyari and Khuzestan provinces in Iran, over a period of 11-month from August 2010 to May 2011.?E. coli?non-O157,?E. coli?O157:NM and?E. coli?O157:H7 were isolated from 14samples (7%), 3?samples (1.5%) and 1?sample?(out of 50 samples of traditional butter)?(0.5%) of the 201 dairy products, respectively, in this study. All the?E. coliO157:H7/NM isolates were positive for?eaeA?and?stx1?and/or?stx2, and one?E. coliO157:H7 isolate was positive for?EhlyA. Of the 3?stx?positive isolates, 1 and 2 isolates had?stx1?and?stx2, respectively. To our knowledge, the present study is the first report on isolation and identification of?E. coli?O157 from traditional butter and cream samples in Iran.
机译：由大肠杆菌O157：NM和大肠杆菌引起的人类疾病。全世界已经报道了大肠杆菌O157：H7菌株。在发达国家，血清型O157：H7代表人类疾病的主要原因;然而，越来越多的报道表明非O157志贺毒素（Stx）产生？与胃肠道感染有关的大肠杆菌菌株。进行本研究以调查ΔE的存在。大肠杆菌O157和E.大肠杆菌O157：H7菌株，并且存在源自某些传统乳制品和牛肉末的毒力基因stx1，stx2，eaeA和ehlyA。在Chaharmahal的伊斯法罕的不同超市和零售店购买了201个样品，其中包括50个传统黄油样品，50个传统奶油样品，kashk 35个样品，doogh 30个样品和碎牛肉36个样品，从2010年8月到2011年5月的11个月内，伊朗的巴赫蒂亚里（Bakhtyari）和胡兹斯坦（Khuzestan）省。大肠杆菌非O157，大肠杆菌。大肠杆菌O157：NM和E.在这201种乳制品中，分别从14个样品（7％），3个样品（1.5％）和1个样品（50个传统黄油样品中）（0.5％）中分离出了大肠杆菌？O157：H7。研究。所有的？ coliO157：H7 / NM分离株的“ eaeA”和“ stx1”和/或“ stx2”均为阳性，其中一个为“ E”。 coliO157：H7分离株EhlyA呈阳性。在3个stx阳性菌中，分别有1个和2个具有stx1和stx2。据我们所知，本研究是关于隔离和鉴定E的第一份报告。伊朗传统黄油和奶油样品中的大肠杆菌O157。

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