to test the suggestion that an inherited defect in colonic mucus rendering it susceptible to degradation by bacterial enzymes may be an important factor in the aetiology of ulcerative colitis , 650 colonoscopic and rectal biopsy specimens from 166 patients with colitis were stained by mild periodic acid schiff ( mpas ) , which shows sialic acid that is deficient in o-acetyl substituents .
C0009324
ulcerative colitis
C0009319
colitis