Fig. 2

The expression profiles of Peking ducking Toll-like receptor 3 (duTLR3) mRNA in virus-infected tissue by quantitative real-time PCR. a Relative Toll-like receptor 3 (TLR3) mRNA expression pattern in liver, (b) spleen, (c) lung and (d) brain. The controls were inoculated with PBS; the experimental ducks were infected with DRV (TH11). Each bar represents the level of target gene mRNA relative to the control group. Asterisks indicate a statistically significant difference (**P < 0.05 and *** P < 0.01, student’s t-test) between the experimental group and the control group used for normalization. Error bars indicate SD