An animal study[32] showed that Peptostreptoccaceae was increased in the dextran sulfate sodiun‐induced colitis mouse model and exhibited increases in pro‐inflammatory cytokines (interleukin IL‐1β, IL‐6, and tumor necrosis factor TNF‐α) and decreases in an anti‐inflammatory cytokine (IL‐13) in the serum. This evidence concerns the gene IL1B and colitis.