PER2 and Salmonella Infections: The cecum transcriptome profiling performed in this study identified genes such as FBXO32 (H7 vs. L7), FKBP5 (H7 vs. L7), NDUFAF8 and CEMIP (H21 vs. L21), TIMD4 (H7 vs. H21), PER2 (H7 vs. H21), EXFABP (L7 vs. L21), MST1 (L7 vs. L21), and S100A9 (L7 vs. L21) as candidate genes for resistance to Salmonella infection.