Prions are incredibly persistent. Regular cleaning that will kill bacteria won't do a thing against a prion. Every butcher in the province has probably had CWD positive animals come through. It's estimated several thousand CWD positive animals are consumed every year in North America (lots of areas with CWD have no testing program at all). The prion that causes CWD appears to not be able to cross the species barrier, but you gotta wonder if it's just a matter of time. If it does it will be much bigger than BSE IMO. On the other hand Scrapie has been around for a couple hundred years and has not crossed the species barrier.
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