Fig. 2

INF-γ/IL-13 was increased in the farming group after PPG and LPS stimulation, while IL-9 production was reduced after PPG stimulation. Cytokine production by CBMCs was assessed in the farming group (n = 40) and non-farming group (n = 80) after unstimulation (U), and PHA, PPG, and LPS challenge. a INF-γ/IL-13 ratio. b IL-9 production. The values are represented as median (25%/75% IQR). Mann–Whitney Rank Sum Test was used to compare the two groups. Statistical significance is indicated by P values < 0.05