GPT and infection: In contrast, there was no obvious change in liver mass, triglyceride, cholesterol, low- and high-density lipoproteins after infection (P > 0.05, Supplementary Figures S2A–E), while serum levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were decreased (Supplementary Figures S2F–H).