Furthermore, this study demonstrated the colitogenic capacity of A parvulum in an Il10−/− colitis model, with the increased expression of the chemokine (C‐X‐C motif) ligand 1 (Cxcl1) and Il17 in the gut, compared with controls, which was mitigated by the administration of the H2S scavenger bismuth.51 This evidence concerns the gene IL17A and colitis.