A lot of factors in vivo can affect the growth of normal enterobacteria in gut and lead to its imbalance and diarrhea. Microecologic studies show that probiotics adhering to intestinal mucosal surface could evolve nature biologic barriers to decrease the occurrence rate of diseases caused by pathogens. And it could protect human gastrointestinal tract from pathogens invasion. The characteristics of adhesion of probiotics to the intestinal mucosal surface are a critical prerequisite for exerting beneficial e...