In the clinical dog’s fine virus infection, generally common in the digestive tract symptoms, but also some of the symptoms of acute myocarditis. The general gastrointestinal symptoms are: loss of appetite, depression, vomiting, diarrhoea, dehydration, septicaemia and in severe cases blood in the stool. Laboratory tests may reveal a significant drop in white blood cell count, an increase in C-reactive protein and a positive test for microviruses. The other type of myocarditis is often not preceded by any signs of heart failure: cyanosis of the mucous membranes, respiratory distress and sudden death. The most damaging aspect of this disease is the destruction of the mucous membrane of the dog’s digestive tract, which can be uprooted and form a large ulcerated surface in the intestine. Also, as the mucous membrane of the digestive tract breaks down, large ulcer foci can form and bacteria in the digestive tract can take advantage of the situation to form an infection, which can be severe enough to cause sepsis. In addition, vomiting and diarrhoea are important ways for dogs to lose water ions. Large amounts of vomiting and diarrhoea can cause severe dehydration, which is fatal for all living organisms. This is why the dangerous symptoms of a disease like the micro virus for dogs are sepsis and dehydration.
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