Hemorrhagic gastroenteritis is identified by blood in the vomit and/or stool, often due to a food borne illness. Because it is a serious disorder that can be potentially fatal, immediate veterinary care is required.
Symptoms
Continuous vomiting and/or diarrhea are the most common symptoms.
Other symptoms include:
Lethargy
Listlessness
Anorexia
Weight loss
Fluid loss
Electrolyte imbalance
Dehydration
Hemoconcentration
Hypovolemic shock
Causes
Infectious gastroenteritis is caused by pathogens (infectious agents). Some of the pathogens most commonly associated with infectious gastroenteritis include:
Bacteria (e.g., Campylobacter, Salmonella, E. coli, Clostridia)
Virus (e.g., Parvovirus, Canine distemper)
Fungi (e.g., Aspergillus, Penicillium, Fusarium)
Parasites (e.g., Roundworms, Hookworms, Tapeworms, Whipworms, Coccidia)
E. coli, Salmonella and Corynebacterium are the most significant intestinal pathogens because they can be passed from animal to human or vice versa. Salmonella infections are also important due to the association with reproductive disorders.
Sudden dietary changes and/or dietary toxins may cause irritation and/or affect the immune system. Eosinophilic gastroenteritis, a chronic form of the illness, has been associated with allergens in dog foods. Gastroenteritis may be also observed due to irritation caused by stress, toxins, physical obstruction, ulcers, and abdominal disorders.
Gastroenteritis is not specific to any breed or gender, however, small breed dogs are more prone to infectious gastroenteritis.
Diagnosis
It may be difficult to identify the cause of gastroenteritis. Therefore, invasive diagnostic procedures may be required if routine diagnostic procedures are not successful.
A brief outline of diagnostic procedures:
Medical history:
Physical obstruction, tumors, ulcers, intestinal blockage, etc.
Information about the severity, progression and magnitude of the vomiting and diarrhea
The vaccination record may help in ruling out a parvoviral infection
Physical observations:
A skin test to determine the presence and extent of dehydration
An abdominal palpation to check abdominal pain and/or abdominal obstruction
An examination of mucus membranes to determine hemorrhagic losses
Cardiovascular function provides information on dehydration and/or blood loss
Visual observation of the vomit and/or stool to determine if there is blood present
Routine blood/biochemical tests:
Packed cell volume (hematocrit) data to confirm hemorrhagic gastroenteritis
Biochemical tests (i.e., liver, kidney, blood protein, and blood sugar)
Fecal study:
Cultural assays to identify any potential microbiological or parasitic organisms
Radiographs/endoscopy:
To locate any potential physical obstruction, tumor, ulcer, intestinal blockage, etc.
Treatment
In most of the cases, dogs recover and respond very well. The course of treatment, however, is dependent on the underlying cause of the condition. A brief outline of treatment is given below:
Fluid and electrolyte therapies are important, especially in cases of hemorrhagic gastroenteritis.
Antibiotic therapy may be restricted to animals with systemic infections.
Corticosteroid therapy is useful in cases of shock. Usually hypovolemic shock develops due to dehydration.
Dog medications that soothe the intestine and bind noxious agents can also be used in supportive therapy.
Parasitic infections are treated with anthelmintics.
Physical obstruction, ulcers and tumors may need surgical treatment.
Living and Management
An improved diet may reduce intestinal infections and other gastrointestinal disorders. The main priority should be to provide healing time for the dog's inflamed intestinal area. Thus, food and water should not be given for at least a period of 24 hours to rest the intestine. Then, provide a bland diet for three to seven days, followed by a gradual return to the dog's normal diet.
Often dietary irritants (especially protein) may lead to a recurrence of the problem. In these cases, a special hypoallergenic medical diet may be required.
Prevention
Some veterinarians have recently emphasized the importance of restoring intestinal microflora through food additives (e.g., probiotics, prebiotics, and synbiotics) in order to prevent the infection from recurring.
If dog owners are using homemade diets, the ideal micro- and macro-nutrient profile, along with optimum energy density, must be the focus of formulation. These diets provide highly digestible nutrients, less fats and restricted osmolarity. Consult your veterinarian for a proper, well-balanced diet for your dog.
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Related: We have more information under our dog health category.