Fig. 5

Effects of different treatments on intestinal barrier function in piglets. A The content of endotoxin in plasma; B the content of D-lactic acid in plasma; C the content of DAO in plasma; D the content of secretory immunoglobulin A content in fecal; E the content of MUC 2 in fecal. All results are presented as mean ± SEM (n = 8–10/group). AA: Amino acid effect; CB: a carvacrol–thymol blend effect, AA×CB: interaction effect of amino acid and a carvacrol–thymol blend. P < 0.1 indicates the tendency of significant difference, P < 0.05 significant difference, P < 0.01 extremely significant difference