血清型E.coli抗原结构比较复杂，主要出菌体（0）抗原，鞭毛（H）抗

E.coli serotype antigenic structure is complicated, the main cells (0) antigen, flagellar (H) antigen and capsular (K) antigen composition. Differences composition according to somatic antigens can be divided into a number of serotypes, and then according capsular flagellar antigen composition into several subtypes. To date, it has been determined in Escherichia coli 171 O antigen species, 80 kinds of antigens K, H 56 kinds of antigens. While it is known E.coli serotype up to as many as ten thousand, but the number of pathogenic E. coli serotypes is very limited. Serotype part of swine dysentery Piglet edema disease and the same, common with O2, O8, O138, O139, O141 and other groups, but different surface antigen, sheep red blood cells capable of dissolving most of the strains.

The serotype E.coli antigen structure is more complex, mainly the bacteria (0) antigen, whiplash (H) antigen and membrane (K) antigen composition. According to the differences in the composition of bacterial antigens, it can be divided into several serotypes, and then according to the composition of the membrane and whiplash antigen can be divided into several subtypes. So far, there are 171 species of E. coli O antigen, 80 kinds of K antigen and 56 kinds of H antigen have been determined. Although the number of E.coli serotypes is known to be in the tens of thousands, the number of pathogenic E. coli serotypes is very limited. The serotype of pig edema is the same as that of piglet jaundice, commonly in groups such as O2, O8, O138, O139, O141, but the surface antigen is different, most strains can dissolve sheep red blood cells.

The antigenic structure of serotype E. coli is complex, mainly composed of cell (0) antigen, flagellum (H) antigen and capsule (k) antigen. According to the differences of antigen components of bacteria, it can be divided into several serotypes, and then into several subtypes according to the antigen components of capsule and flagellum. So far, 171 kinds of E. coli o, 80 kinds of K antigen and 56 kinds of H antigen have been identified. Although there are tens of thousands of known E.coli serotypes, the number of Pathogenic E.coli serotypes is very limited. Some of the serotypes causing edema disease in pigs are the same as those in piglets. The common serotypes are O2, O8, O138, O139, O141 and so on, but the surface antigens are different. Most strains can dissolve sheep red blood cells.<br>