Gastritis, Haemorrhagic

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  • Usually only seen post mortem.
  • Stomach full of thick tarry clots.
  • Occasionally will vomit blood in life.


Haemorrhagic gastritis (Courtesy of BioMed Image Archive)


  • Wall of stomach is blacked and ulcerated.
    • Red, thickened, necrotic, haemorrhagic mucosa.


  • Coagulative necrosis with fibrin, oedema, haemorrhage, and sometimes emphysema.
  • May extend deep into submucosa/muscle.


  • There are several causes of haemorrhagic gastritis
    1. Aspirin and non-steroidal anti inflammatory drug toxicity.
    2. Peracute / acute infections, e.g.
      • Swine Fever
      • Anthrax
      • Leptospirosis in dogs (Leptospira icterohaemorrhagiae).
    3. Clostridial disease
      • e.g. Braxy (Clostridium septicum)
        • Affects older lambs or yearlings producing sudden death.
        • Usually seen on sheep grazing on frosted grass so more common in colder areas.
        • Bacterial exotoxin causes acute abomasitis.
        • Pathology- At post mortem the stomach is grossly distended with partially clotted blood. The wall of the stomach is thickened,reddened and oedematous.
        • Diagnosed by isolation of organism from the stomach wall.
        • Is now usually vaccinated against (Heptovac 7 in 1 clostridial vaccine).
    4. Anticoagulant Rodenticide Toxicity.