E. coli antigen complex, can be divided into cell antigen (O), flagella antigen (H) and surface antigen (K), which has swallowed up body resistance and anti-complement the capacity.

• 大肠杆菌的抗原成分复杂，可分为菌体抗原（O）、鞭毛抗原（H）和表面抗原（K），后者有抗机体吞噬和抗补体的能力。