Clinical features of Sick fowl are listlessness, inappetence, eye closure and sopor, mouth breathing, cough, grunting, swollen face, lachrymation,cockscomb lean;

• 病禽临床表现为精神萎糜、食欲不振、闭目昏睡、张口呼吸、咳嗽、呼噜、肿脸、流泪、鸡冠侧倒；