pestilential pathogen

例句：

1. 1. The diseaseis known to be highly contagious.
   这种疾病已知具有高度传染性。
2. 2. Thebacteria are known to behighly infectious.
   这种细菌已知具有高度传染性。
3. 3. The virus is known tobe highly infective.
   这种病毒已知具有高度传染性。