pcr test

I have two healthy (looking) hens left out of six chicks I purchased last spring. The first bird I sent for a necropsy came back positive for M.S. (PCR). The last bird I sent in for testing in December, with similar symptoms was negative for M.S. I want to see if the two girls I have now are...

Hi all, So this is an odd result I received yesterday on some blood tests I had done on my flock. This is not an emergency, I have no sick birds but I want to get your opinion/experience in what this could have been. I had what I thought was Marek's disease take my whole flock over the...