MMP9 and staphylococcus aureus infection: Furthermore, KEGG terms of these DEGs indicated that they were enriched in human diseases, organismal systems and metabolism, including Staphylococcus aureus infection (e.g., C1QA and cathelin), the Toll-like receptor signaling pathway (e.g., CXCL8 and CXCL9) and IL-17 signaling pathway (e.g., MMP1, MMP9 and CXCL8), and drug metabolism-cytochrome P450a and arachidonic acid metabolism (e.g., HPGDS and PLA2G4D), respectively (Supplementary Figure 6A).