PRKAA2 and legionellosis: The DEGs in cluster 1 were mainly enriched in KEGG pathways related to disease, chemical damage, and immune responses (influenza A, legionellosis, antigen processing and presentation, aminocayl-tRNA biosynthesis, FoxO signaling pathway, longevity-regulating pathway—worm, protein processing in the endoplasmic reticulum, hippo signaling pathway, pathways in cancer, AMPK signaling pathway, RNA transport, tight junction, melanogenesis, RNA transport, and chemical carcinogenesis).