etilogical agent

• 病原体

etilogical agent的用法和样例：

例句

1. The bacterium Neisseria gonorrhoeae,which is the causative agent of gonorrhea.
   淋球菌淋病双球菌，是引起淋病的病原体。
2. What is the nature of this agent that is often referred to as an unconventional viruslike agent?
   这种经常被看作异乎寻常的类病毒病原体的本性究竟是什么？