Parvo in dogs is caused by the canine parvovirus, which is highly contagious and spreads through direct contact with an infected dog or by indirect contact with a contaminated object. Dogs are exposed to the parvovirus every time they sniff, lick, or consume infected feces. Puppies and adolescent dogs are especially susceptible to parvovirus, and they should avoid public places where there is likely to be lots of virus until after their vaccinations are complete.

Symptoms of parvo in dogs include lethargy, loss of appetite, abdominal pain and bloating, fever or low body temperature, vomiting, and severe, often bloody, diarrhea. A dog infected with canine parvovirus will usually start to show symptoms within 3-7 days of infection. Very sick puppies may collapse and have a high heart rate, difficulty breathing, and hypothermia due to the degree of dehydration and infection.

Diagnosis of parvo is based on clinical signs and blood work. A test called an ELISA can be run to search for virus antigens in the dogs feces. There is no cure for parvo, but supportive care can be given to treat symptoms such as vomiting, diarrhea, and dehydration, and to ensure that the dog gets adequate nutrition.

In summary, parvo in dogs is caused by the canine parvovirus, which is highly contagious and spreads through direct or indirect contact with an infected dog or contaminated object. Symptoms include lethargy, loss of appetite, abdominal pain and bloating, fever or low body temperature, vomiting, and severe, often bloody, diarrhea. There is no cure for parvo, but supportive care can be given to treat symptoms and ensure that the dog gets adequate nutrition.