Low mannose-binding lectin (MBL) is associated with paediatric inflammatory bowel diseases and ileal involvement in patients with Crohn disease

► MBL levels were significantly lower in IBD than in controls. ► The prevalence of low MBL level was significantly higher in IBD than in controls. ► MBL levels in patients with CD and UC were comparable. ► Low MBL level was associated with isolated ileal involvement in CD.