3.5. Expression of immune-related cytokine genes in intestine and
head kidney
No difference was observed in the expression of intestinal
cytokine genes among different groups (P > 0.05) (Fig. 4). In head
kidney, there was no significant difference in the expression of tnf-a
and tgf-b among groups (P > 0.05). Nevertheless, the expression of
il-1b in LY was higher compared to the other three groups (CK, HIY,
LowCK) (P < 0.05) (S2 Fig).