Colon cancer-associated B2 Escherichia coli colonize gut mucosa and promote cell proliferation

Table 2 Histological grading of intestinal inflammation

Symptoms	Characteristics
Infiltration of inflammatory cells
0	Rare inflammatory cells in the lamina propria
1	Increased numbers of inflammatory cells, including neutrophils in the lamina propria
2	Confluence of inflammatory cells extending into the submucosa
3	Transmural extension of the inflammatory cell infiltrate
Infiltration of epithelium by polynuclear cells
0	No infiltration
1	Surface
2	Inside the crypt
3	Cryptic abscess
Severity of epithelial damage
0	Absence of mucosal damage
1	Lymphoepithelial lesions
2	Mucosal erosion/ulceration
3	Extensive mucosal damage and extension through deeper structures of the bowel wall
Surface of epithelial damage
0	Normal
1	Focal
2	Wide