We noted that in our study, in addition to identifying both Cyp2a5 upregulation and Cyp1a2 downregulation, we found that the gene expression levels of several genes of the CYP family 2, subgroup family c (Cyp2c23, Cyp2c29, Cyp2c40, Cyp2c50, Cyp2c55, Cyp2c67, Cyp2c78, Cyp2c69, Cyp2c70) were also significantly decreased under infection conditions. The gene discussed is PPIG; the disease is infection.