Detection of West Nile virus via retrospective mosquito arbovirus surveillance, United Kingdom, 2025

In March 2025, as part of ongoing enhanced surveillance for mosquito-borne Orthoflaviviruses, West Nile virus (WNV) RNA was detected in two pools of female Aedes vexans collected in July 2023 in Nottinghamshire, England. Sequencing and phylogenetic analysis of a 402 bp fragment indicate clustering w...

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Bibliographic Details
Main Author: Arran J Folly
Format: Article
Language:English
Published: European Centre for Disease Prevention and Control 2025-07-01
Series:Eurosurveillance
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Online Access:https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2025.30.28.2500401
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Summary:In March 2025, as part of ongoing enhanced surveillance for mosquito-borne Orthoflaviviruses, West Nile virus (WNV) RNA was detected in two pools of female Aedes vexans collected in July 2023 in Nottinghamshire, England. Sequencing and phylogenetic analysis of a 402 bp fragment indicate clustering with WNV lineage 1a. The exact origin of this virus remains unclear, but this finding indicates a historic WNV presence in the United Kingdom. Surveillance has not provided evidence of further WNV transmission to date.
ISSN:1560-7917