疟疾由一种叫作疟原虫的寄生虫引起，通过受感染蚊子的叮咬传播。
Malaria is caused by a parasite called Plasmodium, which is transmitted via the bites of infected mosquitoes.
接触粪便感染原虫而最终被猫吃掉的老鼠便是这寄生计划中不可或缺的一环。
Rats that touch the poop and then get eaten by a cat can complete the circuit.
间日疟原虫是世上最常见的疟疾寄生虫，现在，这种寄生虫也会感染那些之前被认为抗疟疾病的人。
Plasmodium vivax, the world's most common malaria parasite, now infects people previously considered to be resistant.
人们从疟蚊感染了疟疾，它们被感染的原生动物寄生虫称为疟原虫。
People get malaria from Anopheles mosquitoes that themselves are infected with a protozoan parasite called Plasmodium.
人们从疟蚊感染了疟疾，它们被感染的原生动物寄生虫称为疟原虫。
People get malaria from Anopheles mosquitoes that themselves are infected with a protozoan parasite called Plasmodium.
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