寄生虫病

例句：

1. 1. Parasites can cause diseases in humans and animals.
   寄生虫可以在人类和动物中引起疾病。
2. 2. The parasite is causing the host to suffer from anemia.
   这种寄生虫正在使宿主患上贫血症。
3. 3.Parasites are a major cause of disease in many parts of the world.
   寄生虫是世界上许多地区的主要疾病原因。