West Nile Virus

Mosquitoes can carry West Nile virus, which may cause symptoms like fever, headaches, or body aches. While severe cases are rare, it’s important to know how to protect yourself and your family.

Recent West Nile Virus findings

We set up traps and test mosquito samples from different areas in Elgin County, Oxford County, and the City of St. Thomas to check for West Nile virus. Here are the recent positive results:

Date Location
July 23, 2026 Tavistock and Woodstock
July 10, 2025 Woodstock
July 31, 2025 Tavistock
July 28, 2025 Woodstock
September 4, 2025 Tavistock
September 11, 2025 Tavistock and Woodstock
August 12, 2024 Woodstock
August 5, 2024 Aylmer
July 29, 2024 Aylmer

Protect yourself from mosquito bites

Prevent mosquito bites with these simple steps:

When outdoors:

  • Use bug spray and always read and follow the label

  • Wear long sleeves, long pants, and light-coloured clothing

Around your home:

  • Get rid of standing water in birdbaths, plant pots, and barrels

  • Clean gutters and drains regularly

  • Trim shrubs and bushes to prevent mosquitoes from hiding

What to do if you find a dead bird

If you find a dead bird, you can help track West Nile virus:

Note: We do not collect dead birds at the health unit, but reporting them helps track diseases.

Frequently asked questions

Less than 1% of individuals develop serious or life-threatening symptoms. Cases in Ontario are monitored closely. We keep track of infected mosquito samples to assess risk.

If you’re feeling unwell after a mosquito bite, contact your health care provider. They can advise if testing or treatment is needed.

Most mosquito bites don’t cause illness. Watch for symptoms like fever or aches. If you feel unwell, contact your doctor.

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