West Nile virus weekly surveillance and monitoring

Summary of West Nile virus and other mosquito-borne diseases

Latest analysis: September 27 to October 24, 2020 (Week 40, 41, 42 and 43)

  • West Nile virus in Canada:
    • As of October 24, 2020 eighty-six human cases have been reported to PHAC. Of these, there are three deaths reported.
    • Forty WNV-positive wild birds and six positive horses have been reported to PHAC.
    • A total of 15,945 mosquito pools were tested for WNV in four provinces: Saskatchewan (71), Manitoba (1,264), Ontario (13,179) and Québec (1,431). Of these, 198 WNV-positive mosquito pools have been reported to PHAC.
  • Other mosquito-borne diseases of interest:
    • No human cases of Eastern Equine Encephalitis virus (EEEV) have been reported to PHAC. Eight positive horses have been reported to PHAC.
    • No human cases/exposures of California serogroup (CSG) virus have been reported.

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