Schistosoma japonicum attenuates dextran sodium sulfate-induced colitis in mice via reduction of endoplasmic reticulum stress

Table 2 Histological scoring system used in this study

Score	Damaged area	Mucodepletion of glands	Tissue damage	Inflammatory cell infiltration
0	N/A	None	No mucosal damage	Occasional inflammatory cells in the lamina propria
1	≤ 25%	Mild	Discrete epithelial lesions	Increased numbers of inflammatory cells in the lamina propria
2	≤ 50%	Moderate	Surface mucosal erosion or focal ulceration	Confluence inflammatory cells, extending into the submucosa
3	≤ 75%	Moderate	Extensive mucosal damage and extension into deeper structures of the bowel wall	Transmural extension of the infiltrate
4	≤ 100%	Severe