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− | ==Haemorrhagic Gastritis== | + | ==[[Gastritis, Haemorrhagic]] == |
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− | ===Clinical===
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− | * Usually only seen post mortem.
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− | * [[Forestomach - Anatomy & Physiology|Stomach]] full of thick tarry clots.
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− | * Occasionally will vomit blood in life.
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− | ===Pathology===
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− | [[Image:haemorrhagic gastritis.jpg|thumb|200px|right|Haemorrhagic gastritis (Courtesy of BioMed Image Archive)]]
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− | ====Gross====
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− | * Wall of [[Forestomach - Anatomy & Physiology|stomach]] is blacked and ulcerated.
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− | ** Red, thickened, necrotic, haemorrhagic mucosa.
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− | ====Histologically====
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− | * Coagulative necrosis with fibrin, oedema, haemorrhage, and sometimes emphysema.
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− | * May extend deep into submucosa/muscle.
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− | ===Pathogenesis===
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− | * There are several causes of haemorrhagic gastritis
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− | *# Aspirin and non-steroidal anti inflammatory drug toxicity.
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− | *# Peracute / acute infections, e.g.
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− | *#* Swine Fever
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− | *#* Anthrax
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− | *#* Leptospirosis in dogs (''Leptospira icterohaemorrhagiae'').
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− | *#Clostridial disease
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− | *#* e.g. '''Braxy''' (''Clostridium septicum'')
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− | *#** Affects older lambs or yearlings producing sudden death.
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− | *#** Usually seen on sheep grazing on frosted grass so more common in colder areas.
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− | *#** Bacterial exotoxin causes acute abomasitis.
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− | *#** '''Pathology'''- At post mortem the [[Forestomach - Anatomy & Physiology|stomach]] is grossly distended with partially clotted blood. The wall of the [[Forestomach - Anatomy & Physiology|stomach]] is thickened,reddened and oedematous.
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− | *#** Diagnosed by isolation of organism from the [[Forestomach - Anatomy & Physiology|stomach]] wall.
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− | *#** Is now usually vaccinated against (Heptovac 7 in 1 clostridial vaccine).
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− | *# [[Stomach and Abomasum Toxicology - Pathology#Warfarin Poisoning| Warfarin poisoning]].
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| == Vesicular Gastritis== | | == Vesicular Gastritis== |