3.5. The level of diamine oxidase and D-lactate in serum
Intestinal permeability of weaning piglets was evaluated by serum levels of D-lactate and DAO presented in Table 2. Compared with control group, K88 challenging significantly increased serum DAO and D-lactate levels (P < 0.05), whereas, compared with K88 challenged group, dietary supplement with CGMP considerably lowered intestinal permeability (P < 0.05).
3.6. Serum pig major acute-phase protein and ileum secretory immunoglobulin A concentration
The effects of K88 challenge on serum Pig-MAP and ileum SIgA concentration are showed in Table 2. The K88 challenge dramatically increased serum Pig-MAP and ileum SIgA concentration compared with control group (P < 0.05), but dietary supplement with CGMP significantly decreased serum Pig-MAP level (P < 0.05) and tended to lower the SIgA concentration (P = 0.162) caused by K88 challenge.