At 72 h after being infected by G. parasuis, the mRNA levels of IL-1β, IL-6, IL-8, IL-10, IL-18, IFN-γ, and TNF-α in the blood vessels were upregulated in the infection group compared to the control group (p < 0.001), as shown in Figure 1C–I. This evidence concerns the gene CXCL8 and infection.