Fig. 4.

Gene expression of cytokines [IL-1β (a), IL-6 (b), IFN-γ (c), IL-10 (d) and TGF-β3 (e)] in the jejunum of broiler chickens. CON group, received a basal diet; ARG group, fed a basal diet supplemented with 3 g/kg arginine; CON+CP group, received a basal diet and underwent C. perfringens challenge; ARG + CP group, given a basal diet supplemented with 3 g/kg arginine and underwent C. perfringens challenge. The results are expressed as means ± SEM (n = 8). Different letters indicate significant differences for the interaction effect (P ≤ 0.05)