GPT and infection: Total bilirubin (TB), alanine aminotransferase (ALT), cholesterol (CHOL), and triglycerides (TG) were significantly upregulated, and albumin (ALB), alkaline phosphatase (ALP), glucose (GLU), calcium (Ca), and lactate dehydrogenase (LDH) were decreased at 12, 24, and 72 h after G. parasuis challenge in the infection group compared with the control group (p < 0.05) (Table 1, Table 2 and Table 3).