Similar results were also obtained in the KEGG pathway enrichment analysis: target genes of DE miRNAs were mainly involved in the immune-response-related pathways, such as natural killer cell mediated cytotoxicity (early defenses against cells undergoing various forms of stress such as infection with bacteria and viruses [62,63]) and ABC transporter (primarily import systems of E. coli, [64,65]). Here, ABCG2 is linked to infection.