For the first time, researchers have detected the invasive Anopheles stephensi mosquito in Gayi, a rural area in southern Niger Republic — a country already grappling with one of the world’s highest malaria mortality rates.
Genetic analysis confirmed its presence alongside native malaria vectors such as An. gambiae s.s., An. coluzzii, and An. arabiensis. The coexistence of these species has resulted in elevated biting and transmission rates, aligning with the surge in malaria cases reported in 2024.
Experts warn that without immediate investment in robust surveillance, targeted vector control, and regional collaboration, An. stephensi could spread rapidly across the Sahel and beyond. Its presence poses a serious threat to malaria control efforts, especially in vulnerable regions bordering Niger. Urgent action is needed to contain its spread and mitigate its public health impact across Africa.
Learn more: https://www.nature.com/articles/s41598-025-07389-5