The results of pathway enrichment showed that rheumatoid arthritis, Toll-like receptor signaling pathway, pantothenate, CoA biosynthesis, allograft rejection, graft-versus-host disease, intestinal immune network for IgA production, mineral absorption, autoimmune thyroid disease, legionellosis, viral myocarditis, inflammatory bowel disease (IBD), innate immune system, gamma-carboxylation of protein precursors, gamma-carboxylation, etc. are associated with the common DEGs. The gene discussed is CD79A; the disease is legionellosis.