Regarding the Mareks vaccine:
The hen I lost recently was indeed to Mareks. She was a (EE) the 1st I lost due to this. I do realize it could have been brought in by many ways. However I do want to add that I did add my own hatched &vaccinated pullets to the existing unvaccinated flock in August. (After reading this site, and hearing horror stories of this virus, I decided that the next batch of chicks I hatched I would vaccinate them myself, and I did)
Is it a concidence that after integrating vaccinated pullets into a unvaccinated flock, I lose a hen to the virus? Possibly.
After speaking at length to the Dr. Moore at Texas A&M, he did tell me that yes, the vaccine does leak(in very small amounts).
I still have 3 unvaccinated silkies in the flock, and said "I don't get it, they should have fallen first, there known to be escepically suspectable to this virus".
After conversing with him for hours I have come to the conclusion, that I can only add chicks I hatch and vaccinate myself, and never sell or give away eggs, or chickens to anyone else! This totally sucks!! However it would not be ethical or morally ok for myself or anyone else to spread this virus. BTW, if you ever need to pick someone's brain, he is awesome! He will take the time to explain everything to you. I have literally spent about 3 hours total talking to him on the phone. Not all at once, but about 3 times)
Anyway, I thought I would just include this if it is of any help to anyone out there.
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After this report, I had that feeling of "persona non gratta". I have to be extra careful and up front before visiting other farms.
Oh, well, I guess I will just have to hatch more so the ones I have will be enough!!!
Nk, I've been told that Mareks is airborne and can travel from farm to farm. This from the guy I got Mareks from. Although telling a fellow chicken enthusiast is a nice gesture. When I looked up is Mareks airborne this is what I came up with. I don't sell my chicks or eggs for hatching and I'm very careful on what I bring in now.
http://everything-poultry.com/mareks-disease/