IL6 and infection: As shown in Figure 3, the expression levels of IFN-γ, IFN-α, IL-1β, IL-6, and IL-12p40 mRNA were significantly increased, reaching their highest levels at 12 days post-infection (dpi), with fold changes of 18.49-, 28.39-, 36.98-, and 28.98-fold, respectively, before gradually declining thereafter.