At times, it is actually possible to watch the effects of natural selection in host-parasite relationships.

有时，在宿主-寄生虫关系中观察自然选择的影响实际上是可能的。

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Following processes include parasite-mediated cytopathic effects and the induction of apoptosis and parasite invasion of the corneal stroma by elaborating a variety of proteases.

后来的过程包括：寄生虫介导的细胞病理效应、诱导凋亡和通过产生各种蛋白酶入侵角膜基质层。

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