Figure 3 (A) Antimicrobial activity of cationic extracts from biopsies of patients with Crohn's disease (n  =  22), ulcerative colitis (n  =  29) and controls (n  =  13) against E. coli ATCC 25922. ***p < 0.001, **p < 0.01. (B) Representative examples of colony‐forming units of a bacterial suspension of E. coli ATCC 25922, untreated, incubated with cationic extracts of Crohn's disease, of a control or ulcerative colitis.