West Nile virus and other mosquito-borne diseases in Canada: Surveillance and monitoring
2023 situation update: up to Week 31 (ending August 5, 2023)
West Nile virus update
To date, one human case in Ontario has been reported to the Public Health Agency of Canada (PHAC).
Positive wild birds were detected in Saskatchewan (7), Manitoba (41), Ontario (13) and Quebec (2).
Positive mosquito pools were detected in Manitoba (30) and Ontario (71).
No positive equine cases have been reported.
Other mosquito-borne diseases of interest in Canada
One (1) case of Eastern equine encephalitis (EEE) virus in a horse in Ontario has been reported to PHAC. No EEE virus infections in humans have been reported.
No infections of California serogroup (CSG) viruses in humans have been reported to PHAC.