Viral nucleic acids were detected in the tissues of heart, kidney, lung, small intestine and bursa of Fabricius at PI 12 h.

• 结 果表明：用5 个LD50（经点眼滴鼻方式测定）的AIV SZ 株经点眼滴鼻途 径接种实验鸡后，攻毒组PI 12 h 时，即可以在心、肾、肺、小肠和法氏囊 检测到病毒核酸；