This is because the parasite which causes malaria can only mature above 18c.

这是因为促使疟疾成熟的寄生虫需要18摄氏度以上的温度。

youdao

Plasmodium is a protozoan which causes malaria; it is the causative agent of the disease.

疟原虫是引起疟疾的原生动物；是疾病的病原体。

youdao

Mosquitoes transmit the parasite, Plasmodium, that causes malaria, one the deadliest diseases on Earth.

蚊子传播疟原虫，引发疟疾，是一种致死性强的世界性疾病。

youdao

Experts say diarrhea causes more child deaths than the diseases AIDS, malaria and measles combined.

VOA: special.2009.11.17

Malaria causes a million deaths per year, and schistosomiasis, which is a parasitic disease, is unfortunately a common cause of death in the world.

疟疾每年造成一百万死亡,而血吸虫病,这是一种寄生虫病,不幸的是,它是世界上很常见的死因

耶鲁公开课 - 生物医学工程探索课程节选

Malaria is one that causes much disease worldwide.

比如疟疾,波及全球,患者众多

耶鲁公开课 - 生物医学工程探索课程节选

Existing vaccines work against viruses and bacteria, but the parasite that causes malaria is a more complex type of organism.

ECONOMIST: Malaria research gets a shot in the arm

Children under the age of 5 die from asphyxia at birth, sepsis, pneumonia, malaria and other causes.

FORBES: Building a Thriving Marketplace for Life-Saving Commodities

The report also cited indirect causes such as anemia, malaria and heart disease.

CNN: U.N.: Africa, Asia have highest maternal-death rate