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==Introduction==

'''Equine grass sickness''' causes a paralysis of the gastro-intestinal tract, by disruption of the autonomic nervous system. The condition may occur acutely, or progress chronically over several weeks, but is invariably fatal. The aeitology is unknown but an ingested neurotoxin appears to be involved. The neurotoxin is absorbed from the intestinal tract and selectively binds to the autonomic nerve terminals resulting in degeneration and loss of neurons.

 

==Description==

'''Equine grass sickness''' causes a paralysis of the gastro-intestinal tract, by disruption of the autonomic nervous system. The condition may occur acutely, or progress chronically over several weeks, but is invariably fatal. The aeitology is unknown but an ingested neurotoxin appears to be involved. The neurotoxic is absorbed from the intestinal tract and selectively binds to the autonomic nerve terminals resulting in degeneration and loss of neurons.

==Signalment==  

==Signalment==  

===Pathology===

===Pathology===

On post mortem examination the [[Monogastric Stomach - Anatomy & Physiology|stomach]] and [[Small Intestine - Anatomy & Physiology|small intestine]] may be distented and contain large amounts of yellow fluid.  

On post mortem examination the [[Monogastric Stomach - Anatomy & Physiology|stomach]] and [[Small Intestine Overview - Anatomy & Physiology|small intestine]] may be distented and contain large amounts of yellow fluid.  

There is an abrupt change in the [[Large Intestine - Anatomy & Physiology|large intestine]], where no fluid is present and the contents are very dry and mucoid.

There is an abrupt change in the [[Large Intestine - Anatomy & Physiology|large intestine]], where no fluid is present and the contents are very dry and mucoid.

The condition is usually fatal.

The condition is usually fatal.

Horses likely to survive have mild clinical signs with little difficultly swallowing.   

Horses likely to survive have mild clinical signs with little difficultly swallowing.   

==References==

==References==

[[Category:Intestine_-_Functional_Obstruction]]

[[Category:Intestine_-_Functional_Obstruction]]

[[Category:Medical_Colic_in_the_Horse]][[Category:To_Do_-_lizzyk]]

[[Category:Medical_Colic_in_the_Horse]]

[[Category:Expert_Review]]

[[Category:Expert_Review]]

[[Category:Alimentary_Disorders_-_Horse]]

[[Category:Alimentary Diseases - Horse]]

[[Category:Neurological Diseases - Horse]]