@Fire Ant Farm, then how do I deal with this? Will I be left with any birds in the end? If I have a virulent strain, which yep, I agree, will I see a 100% loss? I'm fearing I have all three strains going. One Ocular one visceral and yes, the neural also. I've lost more than one bird with weird neuro symptoms, more than one with probable lung or heart involvement and then I have the ones with the ocular symptoms. Looks like a trifecta of Marek's. If it's a virulent strain and I have survivors can I let the survivors produce chicks that may or may not show resistance to what ever is festering on our property. And taking into consideration what you just said about the effectiveness of the vaccine, how can I introduce new birds onto my property as chicks and keep them healthy or is it even possible. I have a hen sitting on 5 eggs right now. She's such a good little mama. I look at her and almost cry because I don't know what to do to protect her chicks when they hatch.
I'm sorry. I didn't realize you are a [COLOR=333333]virologist/microbiologist. My bad and I'm bombarding you with questions because there isn't anyone around me professionally who will even answer my questions for me and I have a ton of them. I really appreciate your kind words though about vaccination vs non vaccination. Hopefully I will get enough surviving hens to keep myself in even a small flock. I'm quickly running out of standard roosters! I'm down to 3 that aren't currently showing signs of disease, 5 counting the two young bantam cockerels. I just can't imagine life on the farm without chickens.[/COLOR]
[COLOR=333333]I'm waiting for things to dry out a bit and DH is going to go out and use his portable examination equipment to check the Ocular problem birds internal eye. He can dilate their pupils and get a good look at them. I'll know more about those three then.[/COLOR]
IMHO 100% or very close to that number, of chicken flock, in back yards if tested serologically will be positive to MDV.....
The eruption of the disease is VERY much depended on the stress levels of the chickens. Fricuent changes in the flock, coops, multy age flock, reaching point of lay, a extra dominant alfa rooster, the presence of dogs and children, not enough feed and clean water ect.ect.. will make some of your flock members prone to the disease.
Reducing the stress levels and practicing the "all out all in " in your flock are a good way to reduce the the chance to get the disease.