However, there were marked increases in the expression of IL-1β and IL-6 post-infection with CK/SD/w3 at 12 hpi (P > 0.05; Figure 3A) and 18 hpi (P < 0.05; Figure 3A), respectively, reaching the highest expression at 24 hpi (IL-1β at 19-fold and IL-6 at 21-fold, P < 0.01; Figures 3A,B). This evidence concerns the gene IL1B and infection.