THE human immunodeficiency virus, HIV-1, the cause of the global AIDS epidemic, is the most intensively studied pathogen in history.(引起艾滋病全球性传播的人体免疫缺陷病毒（HIV-1），一直被人们最为集中的研究其病原体。)
Deforested areas increase contact between wildlife and humans and affect pathogen transmission.(毁林地区野生动物与人类的接触增加，导致病原体的传播。)
Nosema bombi is a bee pathogen that has also afflicted European bumble bees.(微孢子虫是一种蜂类病原体，它也困扰欧洲的大黄蜂。)
But the potato psyllid is merely the vector. The actual pathogen is still elusive.(但马铃薯木虱只是传播媒介，真正的病原体尚不清楚。)
The problem, of course, is that a tumor is not exactly a pathogen.(当然，问题在于肿瘤并不真的是一种病原体。)
Whenever it meets one that is "not self" and thus likely to be part of a pathogen, it destroys it.(只要遇到一个“非本体”分子，就有可能是病原体的一部分，免疫系统就会将它消灭。)
I've always thought that when I get a fever, it's my body trying to make things uncomfortable for the invading pathogen.(我很早就知道，发烧的时候，其实是我的身体正在对入侵的病原体做出抵抗。)
Once a new pathogen is introduced in one individual, it may spread to the larger population.(一旦一种新的致病源传播给一个个体，它可能向更多的人传播。)
Understanding how a pathogen or humans are affecting the sturgeon could be key to conserving them.(了解一种病原体或人类是如何影响鲟鱼的，对于保护它们是至关重要的。)
Thus a receptor may be a protein, enzyme, membrane channel, or a region of a foreign pathogen.(这样的受体可以是蛋白质、酶、膜通道或外来病原体的一个区域。)
