Metabolic pathways, circadian rhythm, carbohydrate digestion and absorption, thyroid hormone synthesis, mineral absorption, galactose metabolism, starch and sucrose metabolism, circadian entrainment, steroid hormone biosynthesis, and 5′-AMP-activated protein kinase signaling pathway were identified as the top 10 KEGG enriched pathways in the ileum of Lactobacillus-treated groups after excluding disease and infection model pathways (Figure 6). This evidence concerns the gene TG and infection.