We test for MG in our turkeys, but I'm only certified for pullorium for the chickens.
With the turkeys you draw blood, let it settle for 30 minutes, draw off the serum, and send that in for lab testing. I don't know why it's only required for turkeys though. Maybe because they usually hang around longer. Either that or MAYBE they love turkeys more.
Actually, it's because turkeys are -- not more susceptible to it, that's the wrong way to put it. It tends to be a more dangerous and more often life-threatening disease in turkeys. It affects them worse -- there, that's what I was trying to say!