Enteritis is an infection of the gastrointestinal tract characterized by the
sudden onset of vomiting and diarrhea, rapid pulse, fever,
apathy, and depression. The vomitus and diarrhea may contain blood. Dehydration occurs rapidly. Dogs under 1 year of age and those over 10 are
particularly susceptible to the effects of dehydration and shock.
The most common cause of infectious enteritis in dogs is
parvovirus. Salmonella, E. coli, camphylobacter, and
other bacteria are also responsible for some cases.
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The bacteria Clostridium perfringens produces canine hemorrhagic
gastroenteritis. This disease begins suddenly with vomiting, followed in two to
three hours by a profuse, bloody diarrhea. Small breeds, particularly Miniature
Schnauzers and Toy Poodles, have a predisposition for hemorrhagic
Garbage poisoning and ingesting poisons
and toxic chemicals produces signs and symptoms similar to those of acute
enteritis. When diarrhea and vomiting occur together, the dog’s condition is
serious and warrants an immediate trip to the veterinarian.
Treatment: This is directed toward prompt replacement of fluids and
electrolytes. Intravenous fluids may be necessary. Antibiotics that are effective
against the causative bacteria may be administered. Medications to control
vomiting and/or diarrhea may also be needed.
WebMD Veterinary Reference from "Dog Owner's Home Veterinary Handbook"