IL6 and infection: In contrast, both IFN-γ and IL-10 were more significantly increased in erythrocytes from chickens treated with the medium and high doses than in the H9N2-infected group; after 7 days of infection, IL-1β, LITAF, and IL-10 were more significantly increased in the medium- and high-dose groups than in the untreated and H9N2-infected groups; after 14 days of infection, the expression of IL-1β, IL-6, and LITAF was more significantly increased in the H9N2-infected group than in the other test groups.