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Mosquito pool tests positive for West Nile virus in Brantford

Mosquitoes collected earlier last week as part of the surveillance program at the health unit have tested positive for the West Nile virus. The mosquitoes were collected from a residential neighbourhood in Brantford. This is the first lab confirmed evidence of the virus in Brantford and the County of Brant this year.
Mosquitoes can transmit West Nile virus to humans after becoming infected by feeding on the blood of birds carrying the virus. Residents can take the following steps to protect themselves and their families from mosquitoes:
  • Cover up. Wear light-coloured, long-sleeved shirts and pants with tightly woven fabric.
  • Avoid being outdoors from early evening to morning when mosquitoes are most active and likely to bite, as well as at any time in shady, wooded areas.
  • Reduce mosquito breeding sites around your home by getting rid of all water-filled containers and objects. Change the water in bird baths at least once per week.
  • Use an approved insect repellent, such as one containing DEET.
“This is the first confirmed positive mosquito pool for West Nile virus this season. The warm and wet weather conditions this summer have created an ideal environment for mosquito breeding. While no human cases have been reported at this time, this positive pool confirms that the virus is present in our community,” said Filip Pajtondziev, Manager of Infectious Diseases and Sexual Health.
While most people do not become sick after being bitten by an infected mosquito, West Nile virus can cause severe illness in others. Seniors and people with underlying illnesses are urged to be cautious, as they are more likely to develop the illness.
Grand Erie Public Health continues to actively monitor the virus across the region as part of its ongoing surveillance efforts. To report on standing water please call the Grand Erie Health Unit at 519-753-4937, ext. 444.
For more information about West Nile virus visit www.bchu.org/westnile or www.hnhu.org/westnile.
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Grand Erie Public Health
Grand Erie Public Health (GEPH) is one of Ontario’s public health units. GEPH formed in January 2025 when the Haldimand-Norfolk Health Unit and Brant County Health Unit merged. We are dedicated to promoting and protecting the health and well-being of communities within the County of Brant, City of Brantford, Haldimand County, and Norfolk County. Our work is guided by the Health Protection and Promotion Act and the Ontario Public Health Standards, ensuring that our programs and services meet the highest standards of public health practice. We are committed to fostering healthy communities through prevention, education, and health promotion, while working in collaboration with local partners to address the unique needs of our diverse populations.