perosis

[Suki]

Someone on FB posted about perosis.  I have never experienced it but it seems to be a vitamin takeup issue.  Anyone have experience with it here?


http://www.thepoultrysite.com/publications/6/diseases-of-poultry/220/slipped-tendon-perosis/

[Mike Gilbert]

Which is another reason I believe in feeding a scientifically balanced commercial starter feed - it has, or should have, all the necessary nutrients and vitamins that chicks need.     I suppose it is possible there have been cases of perosis that were misdiagnosed as Marek's disease, because the apparent symptoms can be very similar.

[Suki]

A lot of people these days are going to fodder for all their chickens needs. 

http://www.the-chicken-chick.com/2014/02/sprouting-grains-for-chickens-fodder.html

[John W Blehm]

Years ago my nephew had pheasant chicks with it.  I have a Salsbury Manual of Poultry Diseases and could tell that is what it was.  I asked what he was feeding them and he said chick starter.  He didn't know they needed a game bird starter and the problem went away once he switched to the proper feed.

[The Malcolms]

We have 1 bird ( a 10 week old pullet) with similar symptoms.  We were concerned about Marek's but we have no other sick birds out of 150 or so.  Can you have just 1 bird with Marek's?  Maybe it is something like this or a genetic mutation prohibiting vitamin uptake?

[John W Blehm]

We have 1 bird ( a 10 week old pullet) with similar symptoms.  We were concerned about Marek's but we have no other sick birds out of 150 or so.  Can you have just 1 bird with Marek's?  Maybe it is something like this or a genetic mutation prohibiting vitamin uptake?

Yes, I would guess Marek's over Perosis if all the birds are on the same feed/conditions and only one to several out of 150 birds show those symptoms.

[Suki]

Recently, from the library discard sale, I got a book published in the UK on Poultry Diseases.  On Perosis it says: 


--------------------------- Osteopetrosis (Thick Leg Disease; Osteodystrophia Fibrosa).The virus causing this condition appears to be related to that causing lymphoid leucosis. Itis characterized by increased osteoblastic activity in birds about 2 - 3 months old and is more common in the male than in the female. The long bones of the extre­mities, especially the metatarsi, are thickened, deformed, and take on a boot-like appearance, which is characteristic of the disease (Fig. 5). The affected portions are hot and insensitive. The disease is slowly progressive and ends fatally in about two months . It is transmitted from chicken to chicken and / or from turkey to  chicken.The lesions can be distinguished from those of rickets because the bone is defor­med without thickening, whilst in rickets the keel bone is often bent).  In perosis there is also a twisting and flattening of the hock joint.


I gave up trying to upload the shot...Look over here.   https://flic.kr/p/BPomYa

[Mike Gilbert]

I don't believe I ever have seen an affected bird.  Guess I've been fortunate. 

[Suki]

I ran into this again....seems it happened in Northwestern states/Western Canada because they use they used dolomitic limestone instead of Oyster Shell for calcium for hens.  It can also happen if you give birds a lot of epsom salts -- another high in magnesium product.