Usutu virus detected for the first time in mosquitoes in Cádiz

A study by the Carlos III Health Institute and CSIC has detected the Usutu virus in mosquitoes in Cádiz for the first time. It also found that human exposure to the West Nile virus has quadrupled from 0.2% in 2015 to 0.9% in 2022. The Usutu virus was found in Culex perexiguus mosquitoes during an entomological surveillance program. The research highlights the need for enhanced mosquito control and virus monitoring programs. Serological analyses show an increase in West Nile virus seroprevalence across multiple municipalities, confirming its endemic nature in Cádiz. The study emphasizes a One Health approach to better understand virus circulation and transmission dynamics.