病原體的用法和樣例：
例句
-
傳染免疫由以前同一病原體所引起的慢性低度傳染而造成的特定病原體對嚴重感染的相對免疫
Relative immunity to severe infection by a particular pathogen as a result of a chronic low-grade infection induced earlier by the same pathogen. -
初瘡病原體最初侵入的那點(diǎn)處的潰瘍
An ulcer located at the initial point of entry of a pathogen.
