Malaria is an infectious disease caused by a single-celled protozoan parasite called Plasmodium of which there are ten species that infect humans.
疟疾是一种叫做疟原虫的单细胞原虫所导致的传染病，而可以感染人类的疟原虫总共有十种。
The disease is caused by the trypanosoma parasite. It is spread to humans through the bite of infected tsetse flies.
这种疾病由于锥体寄生虫引发，它是通过被感染的采采蝇叮咬传染给人类的。
The disease is caused by the trypanosoma parasite.
这些病是由硝呋莫司寄生虫引起的。
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