Furthermore, the enrichment of the KEGG signaling pathway showed that the expression of XIAP protein was correlated with Apoptosis - multiple species, Legionellosis, Platinum drug resistance, Apoptosis, p53 signaling pathway, Toxoplasmosis, and TNF signaling pathway (p-value<0.001 Figure 4B). This evidence concerns the gene TP53 and legionellosis.