Originally posted by: dullard
Originally posted by: Amused
Originally posted by: SP33Demon
From my understanding, mad cow is passed through uncooked/rare beef.
Your understanding is incorrect.
I
rarely agree with Amused (bad pun intended). However, Amused is mostly correct here. I'm not sure that I agree with much of the mad cow propaganda yet (I'm waiting for more evidence), however I'll regurgitate the best guess that scientists have so far:
Mad cow disease is caused by a protein that is folded in the wrong way (a so called prion). This protein structure encourages nearby normal proteins to also misfold. The result is a bunch of proteins that do not function the way they are supposed to function.
If that is correct, then mad cow disease is not a bacteria or a virus. Things that kill bacteria and virii don't necessarilly damage proteins. Heat is one example. ~150°F is enough to kill most bacteria. However proteins aren't denatured (unfolded) until ~200°F to 250°F. And at the lower temperatures (near 200°F), it takes quite a long time to unfold proteins. So basically, we'd have to cook meat to temperatures well above typical doneness levels to distroy the mad cow prion. The temperatures needed (~250°F) would evaporate virtually all water content and thus the meat would be dry and horrible tasting.