Pretty sure my numbers came from the vet that pulled the blood on your hogs....if it was done in Betram. From what he said...it was the most dangerous in shoats in a 4-5 day window and the pigs blood had to come in contact with an open wound of the dog.
Not 100% sure but something to that nature.
Yep, that is where the real world #s came from. It was your friend who pulled the blood samples. We was a hell of a good sport too, it was a rodeo!
At that time, I did extensive research on PSR and found a report from the TAHC stating that they estimate 73% of all feral hogs in the state are PSR positive. I can not find that link now but if someone were inclined, google would get you to it eventually.
PSR can be transmitted via blood or saliva. however, either method of transmission must be administered into the dogs blood stream in some way. Also, even with direct contamination, it is difficult to transmit from pigs to dogs.
Steve