coccidial

例句：

1. 1. The dog was infected with a coccidium that causes diarrhea.
   这只狗感染了一种导致腹泻的寄生虫。
2. 2.Coccidia are the agents of coccidiosis, which is a common disease in humans and animals.
   原虫是引起人类和动物普遍疾病的病原体。
3. 3.Researchers have identified several new species of coccidia that can cause severe diseases in humans.
   研究人员已经发现了几种新的原虫物种，它们可以导致人类严重的疾病。