Abstract

Lay Summary Active cytomegalovirus (CMV) infection complicates management of inflammatory bowel disease, but the relationship of resolved CMV infection to Crohn’s disease (CD) behavior or localization is unknown. This article reports a striking risk (9-fold) of Crohn’s disease localization to the colon with prior CMV infection. It also reports imputed mucosal cellular composition, HLA class 1, and KIR gene variants that delimit prior observations regarding HLA and KIR associations with Crohn’s disease risk and behavior.

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