Effects of dietary CGA supplementation on mRNA levels of IL-10 in the broiler intestine after LPS injection (n = 6). Relative expression of the gene for IL-10 in the duodenum (A), jejunum (B), and ileum (C) after LPS injection. IL-10 = interleukin-10. The gene for GAPDH was used as a reference for normalization. Blue, saline; red, LPS; green, CGA; violet, LPS + CGA. Bars without the same letter differed significantly (P < 0.05).