CHUK and Behcet disease: The expression levels of the TLR4, MyD88, NF-κB, IKKα, and IKKβ encoding genes were significantly higher in the duodenum (Figure 3A) and ileum (Figure 3C) of the BD+ETEC group compared with those in the BD+Saline group (P<0.05); except for IKKα, a similar expression trend was observed in the jejunum of the BD+ETEC group (Figure 3B) (P<0.05).