The leukocyte infiltration into the mucosa and submucosa of the small intestine of mice with colitis at 6 DPI was associated with increased concentration of IL-6, IL-12p70, IL-10, IL-22 MCP-1 and TNF-α, IL-1β, MPO [4] but lower concentration of IL-17A. The gene discussed is IL17A; the disease is colitis.