In a first for the country, fragments of the West Nile virus have been identified in mosquitoes collected in the UK, according to a statement released by the UK Health Security Agency (UKHSA).
The discovery was made as part of a joint surveillance initiative between the UKHSA and the Animal and Plant Health Agency (APHA). The genetic material of the virus was found in mosquito samples gathered in 2023.
What is West Nile Virus?
West Nile virus (WNV) is a vector-borne disease that typically affects birds and is spread by mosquitoes that feed on birds. On rare occasions, these mosquitoes can transmit the virus to humans.
Most people infected with the virus experience mild or no symptoms, but in very rare cases, it can cause serious neurological illnesses such as meningitis or encephalitis.
Public Risk Level Remains Very Low
The UKHSA has emphasized that the risk to the general public remains “very low”. Despite this, the agency is taking precautionary steps and plans to issue updated guidance to healthcare professionals to ensure preparedness in case of future developments.
Why This Matters
This marks the first-ever detection of West Nile virus in UK mosquitoes, raising new considerations for public health surveillance and mosquito control in the country. While there have been no confirmed human cases in the UK, experts say the detection of viral fragments is a signal that ongoing monitoring is essential.