Insecticide-resistant Anopheles stephensi spreads rapidly across African urban areas

Researchers analyzing the genome of Anopheles stephensi collected from ten African nations found the species now tolerates every chemical used in spraying programs. The mosquito, which thrives in densely populated urban settings, is a known malaria vector, a disease previously less common in many African cities. Experts warn that the rapid expansion may be irreversible, complicating control efforts across the continent.