According to the different cell antigen, can be divided into more than 150 E. coli-type, of which 16 serotypes of Escherichia coli, and often cause of epidemic diarrhea infant and adult Leimo Yan.

• 根据菌体抗原的不同，可将大肠杆菌分为150多型，其中有16个血清型为致病性大肠杆菌，常引起流行性婴儿腹泄和成人肋膜炎。