As shown in Figures 4A–C, the up regulated genes in DEGs, modules, and common genes were mainly enriched in Yersinia infection, Neutrophil extracellular trap formation, Epstein-Barr virus infection, complement and coagulation cascades, neurotrophin signaling pathway, legionellosis, and epithelial cell signaling in the Helicobacter pylori infection (Table 1). Here, BDNF is linked to Epstein-Barr virus infection.