[Mitchell]

Yes, they did get it all. I have a close relative who was very involved in the isolation and destruction of that cow (as well as other animal tissue that might have come in contact with it). The material from that cow never entered either human or animal food.

They caught all the material from that cow. But that cow was presumably infected via contaminated feed, and other cows must have eaten feed from the same infected batch of feed and so would also have been exposed to mad cow disease. Doesn't it seem likely that other cows may have contracted the disease but were never diagnosed?

[Nathan Zachary]

That's one of the reasons we like to kill cows off at around 30 months. if they did have BSE, It's concentrated in the spinal tissue and brain, which is why they banned mechanical stripping in order to prevent the ganglea from getting in meat.