Ultrathin sectioning and transmission electron microscopy of infected duckembryo fibroblasts (DEF) were employed to investigate the morphology of virulent duck enteritis virus (DEV) strain CH.
Seven duck plague virus strains are isolated and identified from seven different invasion districts in Sichuan Province with 9 to 10 day old duckembryo and cross-neutralization test.
用9～ 1 0日龄鸭胚和血清交叉中和试验从四川省七个疑似鸭瘟发病片区分离鉴定了七株鸭瘟病毒。
3
The dynamic changes of tissue structure in 4 days old ducklings which were infected with chicken embryo attenuated strain MY of duck hepatitis virus were observed.