I'll make a note of that.
Seriesly, based on my limited knowledge, self-proteins that go prion would be uniquely suited to infect the species they came from, so there may be something to your hypothesis.
I got all that info from a very long article that ran in the New Yorker mag. when that was really a huge story.
I was very scared about it because ever since I’ve been a kid I would eat a bite of the raw hamburger meat when making burgers. I mean literally one bite, but still I was freaking out.
I do seem to recall that all those 6 or 8 people who died in England, or at least most of them, had all eaten meat from one particular butcher. Now I can’t remember if they were ever able to figure anything out precisely.