Canine parvovirus (CPV) is the most dangerous and contagious virus that affects unprotected dogs. It causes acute gastrointestinal illness in puppies, typically between six and 20 weeks old. However, older dogs can also be affected.
A dog infected with canine parvovirus will start to show symptoms within three to seven days of infection. The most common clinical signs associated with CPV include lethargy, depression, loss or lack of appetite, fever, vomiting, diarrhea (often bloody), and dehydration.
Parvovirus infection is often suspected based on the dog’s history, physical examination, and laboratory tests. Fecal testing can confirm the diagnosis. Currently, the most accurate method of testing for the presence of CPV is PCR testing.