By Government of Saskatchewan

Check Animals for Disease

Chronic Wasting Disease in Saskatchewan

Oct 9, 2020 | 11:24 AM

Chronic wasting disease (CWD) is a fatal, infectious disease of deer, elk, reindeer and moose (cervids) that affects the central nervous system. Caribou, a subspecies of reindeer in Canada, can likely also be affected.

CWD has no known cure or treatment.

An infected cervid may appear healthy for several years before it develops changes in its body and behaviour, such as weight loss, poor co-ordination and other signs before it dies. Infected cervids are also more prone to being killed by other means such as hunting or vehicle collisions.

CWD is a prion disease in the same family of diseases as scrapie in sheep, bovine spongiform encephalopathy (BSE) in cattle (also known as “mad cow disease”) and Creutzfeldt-Jakob disease in humans. Prions are infectious abnormal proteins that accumulate in the brain and other tissues.

CWD Discovery and Spread

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CWD was first identified in a wildlife research facility in Colorado in the 1960s, but was not identified as a scrapie-like disease until 1978. The disease was subsequently found in wild deer in the same area. It is speculated CWD was derived from a mutation of scrapie, which existed in the area, or the CWD prion was caused by a spontaneous mutation within a cervid.

CWD has now been found in Saskatchewan, Alberta and 24 states. The National Wildlife Health Center’s CWD map shows affected farmed cervid herds and general regions where CWD is in the wild. CWD has also been found in South Korea and, more recently, Norway.

For additional information on CWD in Saskatchewan wild cervids, see the Canadian Wildlife Health Cooperative’s CWD page. CWD has been detected in wild cervids throughout most of the western and central portions of the province, as well as the northeastern areas around Nipawin and Carrot River. However, testing has been limited and CWD may also be present in other areas.

CWD was likely brought into Saskatchewan through the importation of infected elk from South Dakota in the 1980s. The disease was first detected in a Saskatchewan farmed cervid in 1996 and in wild cervids in 2000. It has since spread to other areas of Saskatchewan through farmed and wild cervids.

CWD and Human Health

A human case of CWD has never been identified, but transmission to humans cannot be excluded.

As a precaution, Health Canada and the World Health Organization recommend that people not eat meat or other parts of a CWD-infected animal.

The Government of Canada conducts national surveillance for all human prion diseases, and reviews and monitors CWD-related scientific literature. It will provide updated recommendations and positions as new scientific evidence indicates.

The Ministry of Environment offers free voluntary CWD testing. The results will be available in roughly six weeks from drop-off.

Please note: Samples may be deemed untestable for a number of reasons. This includes missing, decomposed, damaged samples or animals that were shot in the head. Samples from animals less than one year of age (fawns and calves) will not be tested.

The ministry is not responsible for the quality of samples received at the laboratory or extracted by hunters. Please ensure that your head is frozen promptly after harvest to prevent decomposition.

If you do not see your result, your sample is still being processed. Please check back in a few weeks.

If you have lost your tracking number of have a question regarding your testing result, please contact our CWD technician at 306-250-0794.

What hunters can do to prevent the spread of CWD

• Get your deer, moose, elk or caribou tested.
• Avoid long-distance movements with your deer carcass.
• All transported carcass waste should be double-bagged and taken to a permitted landfill.
• Handle and dispose of your carcass in a responsible manner.
• If you hunt out of province, only bring back low-risk parts (deboned meat, cleaned skull plate, antlers, finished taxidermy mount).
• Stay up to date on the latest hunting regulations.
• Keep hunting and support ongoing efforts to control the disease by submitting heads for testing in ministry target areas.

Hunters can help reduce the spread of CWD to new areas of the province. Carcasses should be field dressed and deboned near the harvest location or, if dressing/deboning at another site, transported no more than 80 km.

Further information can be found in the Hunters section of the CWD Alliance website. Videos are also available.