Ontario Hunters Urged to Support Chronic Wasting Disease Surveillance
The Ministry of Natural Resources is calling on hunters in the Chatham-Kent and Windsor-Essex regions to contribute to the chronic wasting disease (CWD) surveillance program by submitting brain tissue samples from harvested white-tailed deer during the current hunting season.
CWD Monitoring Remains a Top Priority in Southwestern Ontario
Although Ontario has not detected CWD in wild cervids—including white-tailed deer, elk, moose, or caribou—for over twenty years, provincial wildlife authorities continue stringent surveillance efforts to detect any early emergence of this fatal neurodegenerative disease.
This year, alongside Southwestern Ontario, hunters in Central Ontario regions spanning Sharbot Lake to Midland have also been asked to participate in the sampling program, emphasizing the province’s proactive approach to disease monitoring.
Surveillance Area Selection Based on Risk Assessment
Chatham-Kent and Windsor-Essex were identified as priority zones for 2025 testing due to several ecological and epidemiological factors:
- Proximity to confirmed CWD cases in neighbouring provinces and U.S. states
- Presence of cervid farms including deer, moose, elk, and caribou
- Local white-tailed deer population density
- Historical patterns of CWD surveillance in these areas
The ongoing risk assessment incorporates landscape connectivity and cervid movements that can influence disease transmission dynamics.
Implications of Recent CWD Detections in U.S. States
Recent media reports confirm several new cases in white-tailed deer populations within Michigan, directly adjacent to Ontario. This elevates the urgency for continued monitoring on both sides of the border.
Since the provincial surveillance commenced in 2002, over 16,000 hunter-harvested white-tailed deer samples have tested negative, a testament to Ontario’s early detection efforts.
CWD Presence Across North America
Despite local successes in Ontario, CWD has been identified in multiple U.S. border states, as well as Canadian provinces including British Columbia, Alberta, Saskatchewan, Manitoba, and Québec.
From a wildlife disease epidemiology perspective, the persistence and spread of CWD demonstrate the challenges associated with managing prion diseases in free-ranging cervid populations.
Expert Commentary on CWD Surveillance
“Chronic wasting disease is a prion disease that causes progressive brain degeneration in cervids,” explains a wildlife disease specialist. “Once CWD becomes established, its environmental persistence and transmission routes make eradication nearly impossible.”
Continued surveillance through hunter participation is critical. Early detection provides the best opportunity to implement management strategies to limit spread and protect both wild and farmed cervid populations, which have significant ecological and economic value.
Provincial Efforts Continue to Safeguard Cervid Populations
In previous surveillance efforts, Chatham-Kent, Windsor-Essex, and Sarnia-Lambton have undergone testing in 2020, with Windsor and Sarnia surveyed as far back as 2007. This recurring sampling underscores the recommendation to maintain vigilant ongoing monitoring to protect Ontario’s cervid species.
Additional reporting and sources from: Area hunters asked to help in testing for deadly brain disease in deer | London Free Press
