The lethality rate of the 28-day-old ducks challenged with DSHDV at intramuscular injection,oral administration and intranasal routes were 86%,89%and 97%,respectively.

• 病毒经肌肉注射、口服和滴鼻均能使28日龄鸭感染发病，致死率分别为86%25、89%25和97%25。