Changes

==Clinical Signs==

==Clinical Signs==

The disease causes a range of '''neurological signs''' in '''chicks under 3 weeks''', ranging from ataxia, '''rapid tremor of the head and neck, drooping of the wings''', weakness, paralysis, exercise intolerance to '''blindness''' and changes in vocalisation.  It also causes weight loss, lameness, and unthriftiness.  Affected chicks '''sit on their hocks''', and cannot move well and many '''fall over onto their sides'''. Mortality can be as high as 25% with higher morbity rates of up to 60%. Older chicks show fewer neurological signs and in laying hens the disease causes a '''temporary reduction (2 weeks) in egg production''' and a '''decrease in droppings'''.

The disease causes a range of '''neurological signs''' in '''chicks under 3 weeks''', ranging from ataxia, '''rapid tremor of the head and neck''', drooping of the wings, weakness, paralysis, exercise intolerance to '''blindness''' and changes in vocalisation.  It also causes weight loss, lameness, and unthriftiness.  Affected chicks '''sit on their hocks''', and cannot move well and many '''fall over onto their sides'''. Mortality can be as high as 25% with higher morbity rates of up to 60%. Older chicks show fewer neurological signs and in laying hens the disease causes a '''temporary reduction (2 weeks) in egg production''' and a '''decrease in droppings'''.

==Diagnosis==

==Diagnosis==

==References==

==References==

<references/>

<references/>

[[Category:Avian Encephalomyelitis]]

[[Category:Avian Encephalomyelitis]]