Urgent Mosquito Surveillance Launched in B.C. After Virus Spike

UPDATE: A new mosquito surveillance pilot project has been launched in B.C.’s Sea to Sky region following a concerning spike in cases of the Snowshoe Hare virus and Jamestown Canyon virus. This initiative, announced by Vancouver Coastal Health and the BC Centre for Disease Control, aims to monitor mosquito populations and the viruses they carry in response to four reported cases linked to these viruses in late 2024.

The health authority confirmed that all individuals who contracted these viruses did so within the Sea to Sky corridor. Symptoms reported included serious neurological issues, prompting urgent health investigations. Authorities are warning residents and travelers to seek immediate medical attention if they experience any neurological symptoms, as the severity of these cases has raised alarms.

Dr. Moliehi Khaketla of Vancouver Coastal Health emphasized the importance of this surveillance project, stating, “We’re also undertaking the mosquito surveillance project to learn more about the risk to the public.” The project will gather crucial data to assess risks and inform the public about necessary precautions against mosquito-borne illnesses.

While the Snowshoe Hare virus and Jamestown Canyon virus are not commonly associated with severe human illness, the recent cases have highlighted potential risks. The health authority noted that, although it is rare, some infections could lead to conditions like meningitis and encephalitis. A national survey indicated that between 1% and 42% of Canadians have evidence of prior infection with these viruses.

As warmer temperatures create a more favorable environment for mosquitoes, health officials urge everyone in the region to take precautions. Recommendations include using mosquito repellent, wearing protective clothing, and ensuring living spaces are equipped with screens. Residents are also advised to eliminate potential mosquito breeding sites, which can include anything that holds stagnant water, such as saucers under flower pots and bird baths.

There is currently no vaccine available to prevent infections from these California serogroup viruses. The health authority is prioritizing public awareness and preventive measures as part of this urgent response.

This developing situation underscores the importance of vigilance as health officials work to mitigate risks associated with mosquito-borne viruses in the Sea to Sky area. Stay tuned for more updates as this story evolves.