so, Dr. Fulton from MSU called today. I brought 3 birds down for necropsy Jan. 16... first call he said no parasites inside or out (that was good)' 3yr old Leghorn had internal eggs,
next 2 birds were emaciated pale superficial and deep pectoral muscles fibrotic, ,white mass on liver, possible Mareks. Today he finished the lab work and confirmed it was (is) Mareks,
The Dr. says Mareks is very prevalent every ware and the best thing to do is vaccinate.Birds that survive ;Mareks become immune and are carriers. They usually do not show any sign of the disease.
As my first 2 groups of birds came from hatcheries and were vac. I had no problems for 3 yrs. It wasn't till I got birds from breeders that were not vac. that the unexplained deaths started and it was always the new chicks after they reached about 6months. Most likely the disease was here already The chicks my birds hatched could have been immune but became carriers so new birds were infected.
solution is to vaccinate all chicks before they are a week old,
It is the Dr. opinion that it is of little use to vaccinate older birds even those over 1 week as they have most likely already been infected. I think if I had chicks in the house right now, but they were not vac. I would get the vaccine and vaccinate ASP. I don't think they would be infected inside??
I did vaccinate all my birds as soon as I suspected Mareks. Some sources say vaccinate at any age as long as they have not been exposed (and of course there is no way of knowing that)
can't hurt
the vaccine is not to costly and well worth the effort.
I have lost at least 14 birds in the last 2yrs. to this disease,(maybe more), they go down slowly some times 3 or 4 weeks apart . symptoms for me were healthy birds all of sudden are puffed, listless. start losing weight then they can't walk or stand up, they are so weak, nothing you can do helps. It does not always show the signs your read about on line. a very sad thing to watch,
You feel so helpless
I hope some of you will think about vaccinating, even that is not a 100% guarantee.