The virus fluid was harvested after the YB strain of DRV was propagated in muscovy duck embryo fibroblasts cells(DEF), which was isolated and kept by our laboratory, of good antigencity and immunogenicity, and was used as seed virus.

• 制备疫苗的种毒来源于本实验室分离保存的禽(番鸭)呼肠孤病毒YB分离株，该病毒株具有良好的抗原性和免疫原性。