aying hens in battery chicken cages, industrial poultry

Zoonotic and Vector-Borne Disease Surveillance

WDG Public Health actively monitors diseases that are transmitted between animals and humans, including those spread by mosquitoes and ticks. Visit our Zoonotic Vector-borne Diseases dashboard for local data.

Local surveillance highlights

West Nile virus

  • In 2024, no mosquito pools tested positive for West Nile virus

  • No locally acquired human cases were reported

More information: Local mosquito-borne disease information

Lyme disease

  • Lyme disease continues to increase in Ontario and WDG

  • Blacklegged tick populations are established in parts of the region

More information: Local tick-borne disease information

Emerging zoonotic diseases

Public Health also monitors emerging diseases such as:

  • Eastern Equine Encephalitis

  • Powassan virus

More information: Zoonotic Diseases in Ontario

Avian influenza

More information: Backyard Birds

Additional provincial data

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