infective bulbar necrosis

例句：

1. 1.The disease is infective and can spread rapidly.
   这种疾病具有传染性，可以迅速传播。
2. 2. The infection was infective and required immediate treatment.
   这种感染具有传染性，需要立即治疗。
3. 3. The bacteria are known to be infective and can cause serious illnesses.
   这种细菌已知具有传染性，并能引起严重的疾病。