In this study, the PO and T-NOS activity, NO content, and the expression levels of the propO, ALF, Lys, Muc-1, Muc-2, Muc-5AC, Muc-5B and Muc-19 genes were increased in the three RS groups, which suggested that dietary RS could improve the intestine mucin and antibacterial capacity of the host towards resisting pathogenic infection. Here, MUC5B is linked to infection.