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==Description==
 
==Description==
Chronic hepatitis is an inflammatory-necrotising disease of at least 6 months duration.  It is characterised by hepatocellular apoptosis or necrosis, a variable mononuclear or mixed inflammatory cell infiltrate, regeneration and fibrosis (1).  It predominantly consists of lymphocytic-plasmacytic inflammatory infiltration.   
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'''Chronic hepatitis''' is an inflammatory-necrotising disease of at least 6 months duration.  It is characterised by hepatocellular apoptosis or necrosis, a variable mononuclear or mixed inflammatory cell infiltrate, regeneration and fibrosis (1).  It predominantly consists of lymphocytic-plasmacytic inflammatory infiltration.   
    
A number of aetiologies include:
 
A number of aetiologies include:
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**This may be a cause or consequence of chronic hepatitis.  Copper is normally excreted in bile, therefore it can occur with any cholestatic hepatobiliary disorder.
 
**This may be a cause or consequence of chronic hepatitis.  Copper is normally excreted in bile, therefore it can occur with any cholestatic hepatobiliary disorder.
 
*Chronic drug therapy
 
*Chronic drug therapy
*Infectious, for example infectious canine hepatitis-
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*Infectious, for example infectious canine hepatitis
 
*Autoimmune or steroid responsive disorder
 
*Autoimmune or steroid responsive disorder
  
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