NOD2 and Crohn disease: Some of the candidate genes identified across studies overlap with those found in Crohn’s disease and tuberculosis including; Solute carrier family 11 member of one gene (SLC11A1), Nucleotide-binding-oligomerization domain-containing 2 (NOD2), Major histocompatibility complex type II (MHC-II), and Toll-like receptor (TLR) genes18.