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Immunohistochemical staining of Toll-like receptor (TLR)-3 in colonic biopsies from controls, active and inactive ulcerative colitis (UC), active and inactive Crohn's disease (CD). TLR-3 staining is found in the epithelium and also in various cell types in lamina propria. The TLR-3 expression of the epithelium was enhanced in both active UC and active CD versus healthy controls. Original magnification ×10 and ×40.
