Yes, Texas currently mandates testing of private herds to some extent. You have to test a percentage of the deer that die naturally or the ones harvested to remain certified as free of the disease. We are just in the beginning of being able to live test deer which tonsil or rectal biopsies.
The real killer with this disease is that unlike any other similar disease (Mad cow or scrapie in sheep), you can't depopulate and get rid of it. Both of those diseases will disappear if you kill all infected animals, but CWD will stay in the environment for years (no one knows for sure how long). So once in a place where deer are, you can never get rid of it. That is BAD!
By the way, it is caused by a "prion" and cooking does not kill it. So even well done meat would have active prions in it.
They have now experimentally infected Macaques (monkeys) with the CWD prion.
I know of 2 hunters that killed mature very nice mule deer bucks in northern Colorado that appeared totally healthy, and both came back positive. Colorado refunded both their tag price and the processing fee and told them not to eat the meat.
I would not be that worried about eating it myself, as I think the chances of a problem are very very small. But if I knew for sure I had gotten a positive deer, I would not eat it. If you want to pay me $10,000 to eat a known positive deer, I would probably do it. But offer me one million dollars to feed it to my kids or grandkids and I would decline the same offer.
I am a veterinarian and have private herd deer clients and we test for this routinely. So far we have not had a positive, but there are some in nearby counties. Even though I do work for people who raise pen deer, I will always side with protecting wild deer populations when up against this disease.
venor, ergo sum (I hunt, therefore I am)