In contrast, the expression of casp9 transcripts was downregulated at 7 dpi and 14 dpi by Poly I:C stimulation compared to the control group (0.15 ± 0.09 and 0.22 ± 0.10), and at 14 dpi by PRV-3 infection (0.60 ± 0.04) (Figure 8B). The gene discussed is CASP9; the disease is infection.