The egg-adapted Van Roekel strain is highly neurotropic and does not grow efficiently in the enteric tract of the chicken,and the field isolates of AEV is usually enterotropic . Despite this.

• 鸡胚适应株Van Roekel是高度嗜神经的，并且在鸡的肠道内不能有效的生长，而野毒株却是嗜肠道型的。