The results of KEGG and GSEA analysis showed that some signaling pathways were downregulated in undernutrition 75% + infection group, including neutrophil extracellular trap formation, IL-17 signaling pathway, hematopoietic cell lineage, natural killer cell mediated cytotoxicity, etc. In particular, 11 genes were downregulated in neutrophil extracellular trap formation, which was the signaling pathway with the largest number of downregulated genes. Here, IL17A is linked to infection.