Expression of cytokine mRNAs in jejunum and ileum. When compared to control mice (n = 5) the expression of IL-4 and IL-6, but not IFN-γ or TGF-β1, were significantly increased in allergic mice (n = 5–8). Data are presented as means ± SEM. Mann-Whitney's U-test: **P < 0.01. All samples were assayed in duplicates.