- 1. having used antibiotics, hormones, immunosuppressive, probiotics and laxatives in past three months; 2. pregnant or lactating patients; 3.cannot cooperate or tolerate colonic dialysis treatment; 4.combined with active stage of malignant tumors, cardiovascular, respiratory system, decompensated liver cirrhosis or blood system diseases (including coagulation disorders, hematopoietic dysfunction, etc.) and other serious primary disease; 5. recent merger of patients with infectious diseases; 6.having known to be allergic to some drugs in the study.