Here's an article I found on line. www.nytimes.com/2017/06/26/science/chronic-wasting-disease-deer-elk-prions.html

Fire has to be pretty hot to kill prions, one source said 900*F.

Just burning a carcass may not get that hot. An incenterator would.

Infected animals shed a good bit of material, even burning infected ground won't kill them all, kills plants that may harbor them.

As I posted earlier, it has a lot to do with concentration of prions, infected animals, to have an outbreak.

DF