Table 1.

Scoring system for the disease activity index (DAI).

Score	Weight loss (%)	Stool consistency	Occult/gross rectal bleeding
0	<1	Normal	Negative
1	1–5
2	5–10	Loose stool	Haemo-occult positive
3	10–20
4	>20	Diarrhea	Gross bleeding

Scores were tailed for each category and then divided by three to obtain the DAI. These clinical criteria were used to evaluate the severity of colitis in mice.