There is a big bacteria community in intestinal tract, usually they are in a balance with the host. The biggest immunal organ, intestinal mucosal immunity has identification facility, and it can be tolerance the intestinal normal flora, and clear the entering pathogenic bacteria, so that intestinal mucosal immunity is significant. Probiotics can regulate the intestinal mucosal immunity, enhance the immunity, treat diseases, releave the symtons, improve prognosis, by improving its intestinal microbial inhabitat and immunifaction. Probiotics has curative effect on diarrhea disease, necrotizing enterocolitis, inflammatory bowel disease.
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