TABLE 1.

Scale bar for quantification of macroscopic ulcer score in acetic acid induced ulcerative colitis.

Macroscopic ulcer score	Severity of colon lesion
0	No macroscopic change
1	Only mucosal erythema
2	Small erosions or minor bleeding with mild edema
3	Small bleeding erosions with moderate edema
4	Tissue necrosis, severe ulceration and edema