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News release: September 1, 2023

Peel Region confirms first case of West Nile Virus this year

Brampton, ON (September 1, 2023) – Peel Public Health has confirmed the first human case of West Nile Virus (WNV) for 2023 in a Mississauga resident.

WNV is transmitted to humans through the bite of an infected mosquito. While most people who contract the disease will show no symptoms, some will experience mild flu-like symptoms such as fever, headache, body ache, a mild rash, and swollen lymph glands. In rare cases, persons infected with WNV will develop a more severe form of the disease. People over 50 and those with a compromised immune system are at the highest risk of becoming severely ill when infected with WNV.

Disease activity fluctuates yearly and depends on rainfall and temperature.  Peel Public Health monitors WNV activity in the local adult mosquito population across the Region during the summer season. Mosquitoes collected in Peel began to test positive for the WNV beginning in mid-July and WNV activity in mosquitos has been higher than the historical average.

As summer winds down, residents are reminded to protect themselves against mosquito bites. Mosquitos capable of transmitting West Nile virus remain active until the first hard frost.

Dr. Kate Bingham, Associate Medical Officer of Health at the Region of Peel.

Residents are encouraged to protect themselves from mosquito bites by:

Visit our website for more information about West Nile virus or call Peel Public Health at 905-799-7700 from 8:30 a.m. to 4:30 p.m., Monday to Friday. Caledon residents can call toll-free at 905-584-2216.

Media contact

Alysha Archibald
Communication Specialist
Peel Region

About Peel Region

In 2024, Peel Region marks its 50th anniversary. Peel Region works with residents and partners to create a healthy, safe, and connected Community for Life for approximately 1.5 million people and over 200,000 businesses in Brampton, Mississauga and Caledon. Peel's services touch the lives of residents every day. For more information explore and follow us on X @regionofpeel and Instagram

On December 13, 2023, the Ontario government announced that Peel Region will not be dissolved, and that Bill 112 legislation will be updated to reflect service delivery in Peel. Services for residents and businesses will continue without interruption. For updates and more information, visit Peel's transition page.