Antibodies levels against canine distemper virus and canine parvovirus in vaccinated and unvaccinated dogs

Antibody titres to canine distemper virus (CDV) and canine parvovirus (CPV) were measured in 132 dogs: 80 had been vaccinated at least once, 22 had not been vaccinated, and 30 had unknown vaccination history. Serum antibody titers were measured by means of serum neutralization (CDV) or hemagglutination inhibition (CPV). Serum CDV titers >= 20 and serum CPV titers >= 80 were considered protective. Protective antibodies to CDV were present in 40.1% of the population: 39.8% of the vaccinated dogs, 3.1.8% unvaccinated and in 466% of the dogs with unknown vaccination history. Protective antibodies to CPV were present in 90.9% of the dogs: 93.7% of the vaccinated dogs, 90.9% of the unvaccinated, and 83.3% of the dogs with unknown vaccination history.