extremely significantp < 0.01
The statistical significance was set at p < 0.05, indicated by an asterisk (*), and the extremely significant difference was set at p < 0.01, indicated by a double asterisk (**).
The statistical significance was set at p < 0.05, indicated by an asterisk (*), and the extremely significant difference was set at p < 0.01, indicated by a double asterisk (**).
At 7 dpi, viral loads of the tested tissues demonstrated a decreasing trend, but copies in the 55-week-old ducks were significantly higher than in the 15-week-old ducks, except for the lung (Fig. 4 d).