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

The oxygen-oxygen unit in the peroxides causes malaria parasites essentially to self-destruct.

过氧化物成分中的氧-氧单位导致疟疾寄生虫自我破坏。

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