Establishing a rabbit model of perianal fistulizing Crohn’s disease

Figure 2 The rabbits in groups A and B underwent endoscopy 3 times. A: In group A, mild mucosal erosion was observed on the 7^th day. On the 14th day, a large area of mucosal oedema and erosion appeared. On the 21^st day, the surrounding mucosa was swollen, and a central ulcer had formed; B: In group B, ulceration occurred on the 7^th day. On the 14^th day, the mucosa was swollen, and the surface was hyperaemic and eroded. On the 21^st day, the main manifestation was local congestion.