Are there different strains of canine parvovirus?
Two slightly different strains of canine parvovirus, named CPV-2a (1980) and CPV-2b (1984), are recognized. They cause the same disease and vaccines give protection against both. CPV-2b is associated with the most severe disease. A distinct type of parvovirus (CPV-1) has been found in pups with diarrhea and also in normal dogs. CPV-1 is not thought to be an important cause of disease. How does a dog become infected with parvovirus? The main source of the virus is from the feces of infected dogs. The virus begins to be shed just before clinical signs develop and continues for about ten days. Susceptible dogs become infected by ingesting the virus. Subsequently, the virus is carried to the intestine, where it invades the intestinal wall and causes inflammation. Unlike most other viruses, CPV is stable in the environment and is resistant to the effects of heat, detergents, alcohol, and many disinfectants. A 1:30 bleach solution will destroy the infective virus. CPV has been recovered from
