US EditionFirst Human Case of West Nile Virus Acquired in Canada This Year Confirmed
TORONTO, ONTARIO, CANADA, JUL 31 – The confirmed case involves an adult with no travel history as mosquito surveillance detected the virus in local traps, indicating active transmission within the community.
- On July 31, 2025, the Public Health Agency of Canada announced the first domestically acquired West Nile virus case in Toronto this year.
- During the week of July 20, PHAC’s mosquito surveillance detected the virus in insects from traps at Dixie Road and Bloor Street and Eglinton Avenue West and Ninth Line.
- Toronto Public Health officials said the first confirmed case in 2025 involves an adult resident with no travel history as of July 12.
- Infected individuals may exhibit symptoms two to 14 days after a mosquito bite, and older adults or people with compromised immune systems face higher risk of severe illness.
- Preventive advice urges that last year, the first case was not confirmed until August 16, and people can avoid infection by wearing long sleeves, using Health Canada-approved insect repellent, and eliminating standing water.
20 Articles
20 Articles
Toronto Public Health confirms first human case of West Nile virus
The first human case of West Nile virus has been confirmed in Toronto. Toronto Public Health officials did not provide any further details, except to say that the laboratory-confirmed case is in an adult. The finding comes less than two weeks after the public health agency confirmed the presence of the virus in the city […]
Winnipeg Free Press
First human case of West Nile virus acquired in Canada this year confirmed
Breaking News, Sports, Manitoba, Canada
TORONTO — The Public Health Agency of Canada (PHAC) announces that the first human case of West Nile virus contracted in the country this year has been confirmed in Toronto. This confirmation follows the announcement by the Toronto Public Health Office that its first laboratory-confirmed case in 2025 is an adult resident of the city with no history of travel. The virus is transmitted to humans by infected mosquitoes. PHAC's West Nile virus surve…
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