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Haemorrhagic Gastroenteritis

What is canine haemorrhagic gastroenteritis?

Haemorrhagic gastroenteritis (HGE) is a disorder of dogs which is usually fairly acute in onset. The significant signs of HGE are vomiting and/or diarrhoea containing variable amounts of blood. The blood may be bright red (fresh blood) or dark (digested blood). 

How is HGE diagnosed?

The diagnosis of HGE is by exclusion, meaning other possible causes of bloody vomiting and/or bloody diarrhoea must first be considered. Some of these possible causes include ulcers, trauma, gastrointestinal tumours or obstruction, foreign bodies, infectious diseases, (e.g. parvovirus) and coagulation disorders. Evaluation of these other causes might require such tests as a complete blood count, biochemical analysis of the blood, urinalysis, x-rays, coagulation tests, faecal evaluation ultrasound or endoscopic (fibreoptic) evaluation of the gastrointestinal tract. Because the costs of all these tests could be significant, it is sometimes prudent to treat the dog for a few days with supportive care to see if the signs resolve. More details on this are given below.

How is it treated?


Dogs with HGE will appear profoundly ill and, if left untreated, may die. In most cases, the disorder appears to run its course in a few days if the animal is given appropriate supportive care. Intravenous fluid therapy provides the cornerstone of therapy for HGE. Subcutaneous fluids (given under the skin) are not usually considered adequate to meet the significant fluid requirements of most dogs with HGE.

If intravenous fluid therapy is not given, the dog’s red blood count will continue to elevate due to dehydration. Eventually, the blood may become so thick that it flows very slowly through the blood vessels. In this situation, the dog is a prime candidate for a potentially fatal clotting disorder called disseminated intravascular coagulation (DIC). Once DIC has begun, it is often irreversible and may result in death.
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Additional therapy may include antibiotics and anti-ulcer medication and other treatments designed to aid in recovery.

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  • Home
  • COVID-19 Status
  • Our Hospitals
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  • Book Online
    • Dee Why Vet
    • Kingsford Vet
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  • Healthcare Articles
    • Cruciate Ligament Rupture
    • Dental Disease
    • Puppy and Kitten Care
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  • Our details
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