Ocular marek's disease ?

[Eggcessive]

Do most chickens with ocular Mareks have it in both eyes or just one? I know that @casportpony and @Nambroth have both seen Mareks in their flocks, so possibly a good question for them. I haven’t seen Mareks before, thank goodness, but it seems that many only see it in one eye. Just wondering if it eventually affects both eyes?

 

[Birds of a Feather]

As far as I know, the ocular form of Marek's can eventually affect both eyes.

 

[Nambroth]

Do most chickens with ocular Mareks have it in both eyes or just one? I know that @casportpony and @Nambroth have both seen Mareks in their flocks, so possibly a good question for them. I haven’t seen Mareks before, thank goodness, but it seems that many only see it in one eye. Just wondering if it eventually affects both eyes?

My hen that displayed ocular Marek's passed away from a secondary problem about 6 months (estimated) after she started developing the "keyhole" iris. I suspect that it can affect both eyes but often, birds become immune-suppressed from the disease to the point that they perish from a secondary infection or problem before it can persist for too long.

 

[Nambroth]

Hello, I'm in Brazil and this is my first post.
I have an almost blind rooster, will it be ocular marek disease?

Thank youView attachment 1413433

This is not a diagnosis, but it does appear to be ocular Marek's. Does he seem to be blind or have vision loss? I know you don't know exactly how old he is, but even an estimate would help. Did this develop suddenly, or gradually? Any other losses of other birds in the last year, or any other symptoms?