The ulcerative colitis is one of the inflammatory bowel disease,takes ulcer as pathology characteristic.In recent years,its incidence advanced year by year in our country. In spite of this sickness accurate pathogenesis is not clear until now,we thought that is interacted by many kinds of factor,mainly including immunity,heredity,infection,and stress disorder factor;Its morbidity already has own immunity mechanism participation,also has the hereditary factors to take the background.Obviously,infectio...