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*** Significant inflammatory infiltrate in the mucosa and sometimes deeper layers.
 
*** Significant inflammatory infiltrate in the mucosa and sometimes deeper layers.
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==Eosinophilic Enteritis==
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* Can be either focal or diffuse.
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===Focal===
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* A disease of young dogs.
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* Associated with [[Toxocara canis|''Toxocara canis'']] infection.
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** Pin-head sized white nodules can be seen under the serosa in the bowel.
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*** Consist of of eosinophils and occasionally macrophages and plasma cells.
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*** Can sometimes see [[Toxocara canis|''Toxocara'']] larvae in the nodules.
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===Diffuse===
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* Seen in the dog, cat and horse.
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* Idiopathic
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* Has a predilection for German Shepherd Dogs, but also occcurs in other breeds of dogs and in cats.
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** Recurrent episodes of diarrhoea with tissue and circulatory eosinophilia.
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*** Eosinophils heavily infiltrate all layers of stomach and intestines.
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**It has been suggested that it is a type of hypersensitivity reaction.
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[[Image:eosinophilic_enteritis.jpg|thumb|right|150px|Eosinophilic enteritis - horse(Courtesy of Susan Rhind, University of Edinburgh)]]
      
==Idiopathic Eosinophilic Enteritis==
 
==Idiopathic Eosinophilic Enteritis==
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