The Ultrastructure changes of liver, heart, lung, kidney, spleen, bursa and thymus of Muscovy ducks infected experimentally with muscovy duck reovirus were observed.

• 摘要对人工感染番鸭呼肠孤病毒发病雏番鸭的心、肝、肺、肾、脾脏、胸腺、法氏囊等7种实质器官的超微结构进行了观察。