E. coli 0 157: H7 serotypes are EHEC, since 1982 in the United States since the first discovery, including China and many other countries have reported, and the growing increase.

• 大肠杆菌0 157：H7血清型属肠出血性大肠杆菌，自1982年在美国首先发现以来，包括我国等许多国家都有报道，且日见增加。