Canine Parvovirus Update December 10, 2012 – James Evermann, PhD, WSU/CVM
Parvo in Western Washington? What we Know– Sandy Willis, DVM, DACVIM
Recently ACCES in Seattle and Renton sent out a notice to veterinarians informing them of a possible significant disease outbreak in their population of animals. In two weeks’ time, the notice stated, seven cases of parvovirus gastroenteritis were seen at their two clinics including staff-owned animals that were current on their vaccinations. Although it appears that this increased incidence was limited and a true community wide outbreak was not seen, owners and veterinarians were concerned, the media attention was tremendous and several dog parks were closed. Read full story.
The summer-fall are the most contagious times for CPV. A high virus challenge load will overcome prior immunity, so hygiene is essential to dilute out the street virus from the environment. Maintaining a high “herd immunity” (kennel immunity), is essential, so making sure all dogs, especially those in close contact with very susceptible dogs (<6mos) are vaccinated.
Current reports indicate that the CPV vaccines will cross protect if used regularly. Some people are not vaccinating on a regular basis any more, which allows for increased CPV fecal shedding from carrier dogs (up to 70%), and increased susceptibility to high challenge doses mentioned above.
Concurrent viral infections with canine enteric coronavirus will amplify the clinical symptoms. Concurrent bacterial infections with E. coli, Campylobacter, and Salmonella, will also amplify the symptoms.
WADDL can check fecals for CPV/CCV by electron microscopy, and screen for enteric bacteria as well and can attempt virus isolation on the fecals to detect a new variant, if such exists. We can check pre-existing immunity by doing CPV IgG antibody levels on animals to determine if a booster is needed.
Some labs offer CPV PCR, which may pick up carriers as well as clinical dogs. WADDL does not offer CPV PCR.
James Evermann, PhD
Cases of canine Parvovirus have spiked this year in the Seattle area. Parvo is a highly contagious virus that can spread through contaminated feces, water bowls and toys and can live a long time in soil or on pet's fur. Make sure to vaccinate your dogs per your veterinarian's recommendations.
King County sees spike in canine parvo virus cases – KOMO News
Frequently Asked Questions about Canine Parvovirus: Type 2c (FAQ) – American Veterinary Medical Association
Parvo concerns prompt dog-park closures – King 5