(1) clinical respect: Have chronic diarrhoea, mucous, blood, bellyacke, show chronic repeatability paroxysmal or durative, companion has the systemic symptom of different level.

• (1)临床方面：具有慢性腹泻、粘液便、血便、腹痛，呈慢性反复性发作性或持续性，伴有不同程度的全身症状。