الفهرس 
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Abstract
Enterohaemorrhagic Escherichia coli (EHEC) was a subset of pathogenic E. coli that caused diarrhea or hemorrhagic colitis in humans. Hemorrhagic colitis occasionally progresses to hemolytic uremic syndrome (HUS) which is an important cause of acute renal failure in children and morbidity and mortality in adults.
Beef and beef products as the most frequently identified source of food borne EHEC infection.Meat products are Considered one of the most products which attract the consumers for its palatability, low price and easily preparation than fresh meat.
Therefore, this study was designed to throw spot lights upon prevalence of Enterohaemorrhagic E.coli strains isolated from different meat products samples. the present study was performed on a total of 105 samples were taken from different meat products including minced meat, sausage and luncheon were collected from different small scale shops and markets with different sanitation levels at Menofiya Governorate to be examined bacteriologically for detection of Enterohaemorrhagic E.coli strains.
The obtained results were summarized as follows
1. There is no single technique that can be used to isolate all EHEC serotypes. The samples were analyzed by duplicate. One replicate was processed according to E.coli conventional method for EHEC non O157:H7 and the other was for E. coli O157:H7 screening.
2. E.coli isolated in percentage of 30.5% represented as; 34%, 25.7% and 31% form minced meat, sausage and luncheon samples, respectively.
3. While non sorbitol fermenting E.coli was recovered from 17 samples with a prevalence rate 16% represented as 20% , 17% , 11.4% from minced meat, sausage and luncheon , respectively.