CTSK and herpes simplex infectious disease: A correlation analysis (Figure 6B) showed that the DEGs are mainly involved in the Toll-like receptor signaling pathway, salmonella infection, herpes simplex infection, MAPK signaling pathway, pyruvate metabolism, cysteine and methionine metabolism, and cardiac muscle contraction, and the key genes regulating these processes are JUN, FOS, EGR1, IRS2, CTSK, and CYR61.