what exactly is parvo
Fact sheet What is parvovirus? Canine parvovirus, or parvo as it is commonly known, is a virus that usually attacks the canine intestinal tract (canine parvovirus enteritis) and, in rare cases, the heart (myocarditis).anine parvovirus, or parvo as it is commonly known, is a virus that usually attacks the canine intestinal tract (canine parvovirus enteritis) and, in rare cases, the heart (myocarditis).