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Ottawa WNV Cases Rise: Third Person Infected
18 Sep
Summary
- A third person has tested positive for West Nile Virus in Ottawa.
- Twenty-seven mosquito pools have tested positive for the virus.
- Older adults and those with weakened immune systems are at higher risk.
Ottawa Public Health has reported the confirmation of a third human case of West Nile Virus (WNV) this summer as of September 17, 2026. This brings the total number of infected individuals to three this year.
In addition to human cases, 27 mosquito pools have tested positive for WNV, indicating a significant presence of the virus in the environment. WNV is transmitted by Culex pipiens mosquitoes, a species commonly found in urban areas, including neighborhoods and parks where water may collect.
Ottawa Public Health advises residents to remain vigilant and continue taking precautions against mosquito bites until the season's first hard frost. Recommended measures include using insect repellent, wearing protective clothing during dusk and dawn, and eliminating standing water around properties to reduce mosquito breeding grounds. While anyone can contract WNV, individuals who are older adults or have weakened immune systems are at a higher risk of developing severe illness.
