BSE Tidbit of the Day

If you keep reading down to what Jiri Safar says in this article , the minimum dose required in order to contract BSE is amazingly small:

Safar, who says he no longer eats red meat himself, said that the minimum dose of prion-infected brain tissue known to cause disease is the equivalent of one-fifth of a drop of water.

Of course, I don't know in what animal system Safar is talking about. But still, that is a surprisingly small amount of stuff considered enough to be infectious.