Figure 4. Ratio of Firmicutes (C. coccoides plus C. leptum) to Bacteroidetes in the mucosal microbiota. The Figure shows the ratio in patients with CD and UC. CD-N and CD-Ab refer to Crohn's disease normal and abnormal mucosa. UC-N and UC-Ab refer to ulcerative colitis normal and abnormal mucosa. Significant P values are shown above the bars in the Figure. None of the other differences was significant. IBD biopsies showed a significantly lower ratio compared with controls.