[Fury]

My questions: How can Sundlof possibly know this (i.e. "... half a gram")? What is the basis for his statement?

For the TSE that affects sheep and goats (scrapie), studies were conducted which used brain tissue (going on memory, will look up when I get home) from a sheep infected with scrapie being surgically implanted into a healthy sheep's brain, with the recipient sheep at some point testing positive and eventually demonstrating clinical signs for scrapie. I believe the amount of the brain tissue used was very small in weight/size.

[Phaedrus]

The USDA's much ballyhooed new measures to address the emergence of mad cow disease in the US are wholly inadequate. Until there is a complete and total ban on all feeding of slaughterhouse waste to livestock, coupled with the testing of millions of animals, mad cow disease will continue to amplifying and spread in US animal feed and among livestock. Eventually we will see cases of human mad cow disease emerging. It was a decade after the recognition of the first mad cow in Britain that the human deaths, continuing today, began appearing.

It's the Cow Feed, Stupid!