CLEC4D and legionellosis: In the KEGG enrichment analysis the pyroptosis-related DEGs were mainly enriched in the following top 10 pathways: NOD-like receptor signaling pathway, Yersinia infection, Salmonella infection, Neutrophil extracellular trap formation, Necroptosis, Legionellosis, Influenza A, Lipid and atherosclerosis and C-type lectin receptor signaling pathway (Fig. 5A).