The European Centre for Disease Prevention and Control (ECDC) has warned that Europe must strengthen its mosquito surveillance and broaden control tools as West Nile virus transmission expands and invasive mosquito species establish in new areas. As of August 13, 429 locally acquired West Nile cases had been reported across nine European countries, with six regions reporting local transmission for the first time this year . Transmission typically peaks in August and early September, so numbers are expected to rise .
The Asian tiger mosquito (Aedes albopictus), which can transmit dengue and chikungunya, is now established in 16 European countries—double the number from 12 years ago . Meanwhile, Culex mosquitoes, which transmit West Nile, are already widespread . Climate change is lengthening and intensifying transmission seasons for these viruses, according to the ECDC .
A new ECDC survey of 38 countries (26 responded) found significant disparities in how mosquito control programs are organized, funded, and implemented. Many rely on short-term funding and lack long-term planning, with responsibilities split across national, regional, and local levels, hampering cross-border coordination . The ECDC and EU partners, in a Eurosurveillance article, identified "deficiencies in Europe's mosquito control capacity" and called for better coordination and a broader toolkit .
