The first part is multiplication,purification and electron microscope examination of the avian encephalomyelitis virus. A 1:5 dilution of isolate-NH937 of AEV and control group of PBS were inoculated to susceptible 6-day-old chickensembryos. respectively.

• 本研究共分四个部分：第一部分为AEV的增殖，纯化和电镜观察，用1:5倍稀释的AEV-NH937株和阴性对照PBS分别经卵黄囊接种于6dSPF鸡胚，继续孵化10d后，收集尿囊液。