|
Scrapie is an interesting case. Not only is it understood that there is no transmission risk to humans (in the 250 years we've known that scrapie existed), there are sheep with genetic resistance to it. Certain individual sheep have genetic markers that make them resistant, and so a person can buy these genetically tested animals to breed resistance into their flocks. Certain breeds are also more or less susceptible; I keep Katahdin hair sheep, and that breed has no record of ever having an infected animal.
|