Fig. 6

Suppressive action of CD4 + CD25 + T reg cells on the division of Th cells. a The suppressive action of Tregs on the division of effector T cells; b–e the suppressive action of Tregs on the production of IFN-γ, IL-13, IL-9, and IL-17 in effector T cells. Te: CD4 + CD25-T effector cell; Tr: CD4 + CD25 + T regulatory T cell (n = 8). The values are represented as mean ± SEM. T-test was used to compare the farming and non-farming groups. Statistical significance is indicated by P values < 0.05. n = 8