The main character is that variola on the hairless skin,or form the filamentous necrotic scab on the mouth and the throat. The mortality is over 0%,and can induce high death rate with other infection intercurrent.
The main character is that variola on the hairless skin,or form the filamentous necrotic scab on the mouth and the throat. The mortality is over 0%,and can induce high death rate with other infection intercurrent.
该病的主要特征是在鸡的无毛或少毛的皮肤上出现痘疹,有的在口腔、咽喉部形成纤维素性坏死性痂膜,死亡率可高达0%以上,若并发其他的传染病可导致较高的死亡率。 幼雏发病后生长缓慢、消瘦;