Aedes aegypti mosquito detection in Northern Europe

The yellow fever mosquito (Aedes aegypti) has been identified in parts of Northern Europe. In Sweden, a female specimen was discovered in a trap in Malmö, Skåne, marking the first time the species has been recorded in the country. While the mosquito is a known vector for viruses such as dengue, Zika, chikungunya, and yellow fever, Swedish veterinary authorities (SVA) confirmed that no viruses were detected in the specimen.

In the United Kingdom, the species has been found breeding in residential areas of east London, representing the first instance of active reproduction within the country. Experts suggest the mosquitoes likely arrived through imported goods, luggage, or vehicles.

Researchers from Sweden and Denmark have expressed concern regarding the proximity of the species to Denmark, but they do not expect the mosquito to establish permanent populations in these northern latitudes. This is due to the species' requirement for heat, which makes survival unlikely during Scandinavian winters.