Difference between revisions of "Category:Hepatitis, Bacterial"

From WikiVet English
Jump to navigation Jump to search
 
(13 intermediate revisions by 2 users not shown)
Line 4: Line 4:
 
*bacteria can enter the [[Liver - Anatomy & Physiology|liver]] through a variety of routes
 
*bacteria can enter the [[Liver - Anatomy & Physiology|liver]] through a variety of routes
 
**direct implantation
 
**direct implantation
***eg foreign body penetration from [[The Reticulum - Anatomy & Physiology|reticulum]]
+
***eg foreign body penetration from [[Reticulum - Anatomy & Physiology|reticulum]]
**direct extension from disease in adjacent tissues of supportive [[Peritoneal Cavity Inflammatory - Pathology|peritonitis]]
+
**direct extension from disease in adjacent tissues of supportive [[Peritonitis|peritonitis]]
 
**haematogenously
 
**haematogenously
 
***via the umbilical vein from an infected umbilicus
 
***via the umbilical vein from an infected umbilicus
***via the portal vein in the [[Alimentary - Anatomy & Physiology|alimentary tract]]
+
***via the portal vein in the [[Alimentary System Overview - Anatomy & Physiology|alimentary tract]]
 
***via the hepatic artery in bacteraemias and septicaemias
 
***via the hepatic artery in bacteraemias and septicaemias
 
***via the bile ducts
 
***via the bile ducts
 
*the [[Liver - Anatomy & Physiology|liver]] may show microscopic evidence of involvement in a large variety of systemic infections
 
*the [[Liver - Anatomy & Physiology|liver]] may show microscopic evidence of involvement in a large variety of systemic infections
 
*these can be accompanied by jaundice
 
*these can be accompanied by jaundice
*the changes in the [[Liver - Anatomy & Physiology|liver]] are diffuse with many small areas of necrosis surrounded by [[Neutrophils - WikiBlood|neutrophils]] and [[Lymphocytes - WikiBlood|lymphocytes]]
+
*the changes in the [[Liver - Anatomy & Physiology|liver]] are diffuse with many small areas of necrosis surrounded by [[Neutrophils|neutrophils]] and [[Lymphocytes - Introduction|lymphocytes]]
 
**eg Salmonellosis or Listeriosis
 
**eg Salmonellosis or Listeriosis
 
</div>
 
</div>
Line 22: Line 22:
  
 
</b></big>
 
</b></big>
|logo =
+
|logo =path-logo.png
 
}}
 
}}
 
 
[[Bacillary Haemoglobinuria]]
 
 
 
[[Tyzzer's Disease]]
 
 
 
 
 
====Leptospirosis====
 
*''Leptospirosis icterohaemorrhagica'' - a septicaemic disease which affects the [[Liver - Anatomy & Physiology|liver]]
 
*puppies
 
*Leptospirosis is an important spirochaetal group of diseases causing disease in animals and humans (zoonotic)
 
*Transmission
 
**via urine of affected animals
 
**organisms can remain viable for weeks in damp conditions
 
*method of action
 
**cause anaemia via intravascular haemolysis
 
=====Clinical=====
 
*fever
 
*dehydration
 
*haemorrhaging from the mucous membranes of the body
 
=====Diagnosis=====
 
*dark field microscopy on fresh urine is best
 
=====Gross=====
 
*widespread hameorrhages
 
*icterus
 
*pale foci in the [[Liver - Anatomy & Physiology|liver]] (not always a constant finding)
 
*subcapsular and cortical renal haemorrhages
 
=====Microscopically=====
 
*foci of necrosis
 
*dissociation of hepatocytes form each other (similar to post mortem change)
 
*substantial haemosiderin in the Kuppfer cells (from the haemolysis)
 
*need to use a silver stain or immunofluorescence to demonstrate the organisms in tissues
 
 
====Salmonellosis====
 
*''Salmonella dublin''
 
*calves
 
=====Clinical=====
 
*fever
 
*dehydration
 
*[[Diarrhoea|diarrhoea]]
 
=====Gross=====
 
*severe, often haemorrhagic, inflammation in the [[Ileum - Anatomy & Physiology|ileum]]
 
*'''paratyphoid nodules''' - pale foci of necrosis in the [[Liver - Anatomy & Physiology|liver]]
 
=====Microscopically=====
 
*foci of hepatocytic necrosis
 
*mixed mononuclear inflammatory cell infiltrate
 
NB: small foci of hepatocytic necrosis are often found as incidental lesions at post mortem examination
 
 
====Other bacteria causing liver lesions====
 
=====''Mycobacterium tuberculosis''=====
 
*in all species
 
*causes granulomas
 
 
=====''Actinobacillus equuli''=====
 
*foals
 
*bacteria from the septicaemia localise in the [[Liver - Anatomy & Physiology|liver]] and other tissues, including the [[Urinary System - Anatomy & Physiology#Upper Urinary System|kidney]]
 
 
=====''Nocardia species''=====
 
*dogs
 
*cause pyogranulomatous foci
 
 
 
 
  
  
 
[[Category:Liver_-_Inflammatory_Pathology]]
 
[[Category:Liver_-_Inflammatory_Pathology]]

Latest revision as of 18:36, 15 February 2011

Hepatitis, Bacterial

  • bacteria can enter the liver through a variety of routes
    • direct implantation
    • direct extension from disease in adjacent tissues of supportive peritonitis
    • haematogenously
      • via the umbilical vein from an infected umbilicus
      • via the portal vein in the alimentary tract
      • via the hepatic artery in bacteraemias and septicaemias
      • via the bile ducts
  • the liver may show microscopic evidence of involvement in a large variety of systemic infections
  • these can be accompanied by jaundice
  • the changes in the liver are diffuse with many small areas of necrosis surrounded by neutrophils and lymphocytes
    • eg Salmonellosis or Listeriosis

Pages in category "Hepatitis, Bacterial"

The following 8 pages are in this category, out of 8 total.