Plasmodium ovale

例句：

1. 1. Malariais a serious disease that can be transmittedby mosquitoes.
   疟疾是一种严重的疾病，可以通过蚊子传播。
2. 2. The Plasmodiumovale strain is responsible for themajority of malaria cases in Africa.
   疟原虫株是非洲大多数疟疾病例的原因。
3. 3. Researchers are working todevelop vaccines and treatments for malaria.
   研究人员正在努力开发针对疟疾的疫苗和治疗方法。