Regarding the blood biochemical parameters, 24–72 h after G. parasuis challenge, the levels of ALB, ALT, ALP, TC, GLU, IP, CRE, HDL-C, LDL-C, γ-GT, and CK decreased, and the levels of AST, UA, and BUN increased in the infection group compared to those in the control group (P < 0.05; Figure 3B). This evidence concerns the gene GPT and infection.