Duck Egg-Drop Syndrome Caused by BYD Virus, a New Tembusu-Related Flavivirus
Figure 2
The course of natural disease.
Representative of the average feed uptake of the infected flock at Farm 1 (A); Daily egg production rate represented by two infected duck farms (B). The flocks at Farm 1 were 35 weeks old, and Farm 2 flocks 1–4 (Farm 2-F1, -F2, F3, -F4) are four different flocks (76 weeks old) at another representative farm.