There were reports recently of an epidemic of Parvovirus in the South of England with a cluster epidemic noted in the area of Hull where 30 cases have been treated in less than one by the PDSA ( a UK animal charity) PetAid Veterinary group.
Our experience of this disease in Kildare/Laois and Offaly is that it comes in clusters of a dozen or so cases each Spring and Autumn but never actually goes away as we get a case most weeks all year round. The movement of puppies before vaccination at a time of immune naivety is very risky. Stocking density within breeding kennels is a key risk factor while the immune status of the breeding bitch is key to proection of very young and at risk puppies.
Parvovirus is commonly known as Parvo and is a high morbidity and high mortality infection in Dogs. The main signs are fever, dullness, vomitting and diarrhoea. The diarrhoea tends to be haemorrhagic or blood-tinged. Pups in particular become very sick, very quickly and survival rates are typically in the region of 50% only.
Canine Parvovirus or CPV2 was first recognized in 1978. It spread worldwide within one to two years. It is thought that a cat virus known as panleukopenia may have mutated into the CPV2 form. Scientists however cant be sure as to its origin as CPV2 is confined to dogs, wolves, foxes. A
There is a cardiac form and an intestinal form. For practical purposes we recognize these cases in the early stages by their lethargy, fever and sometimes distinctive smell. Those that survive the debilitating five to seven day process of intestinal necrosis causing intense bloody diarrhoea can survive or die anyway due to prolonged shock or go on to develop the cardiac form where the heart muscle is permanently damaged.
Prevention is obviously better than cure in this instance. Especially as the virus is also resistant to the extent that only bleach-base disinfectants kill Parvo and it can survive in soil, concrete and bedding for up to one year. Prevention is simple by a regime of vaccination injection at eight, ten and twelve weeks of age with annual booster. Booster Vaccination of pregnant bitches is also recommended as maternal antibodies in the milk of vaccinated bitches are strongly protective.
I treated about 15 cases in a two week period in Portarlington recently. I see about 50 cases a year normally. I even have seen a case where one family lost a rottweilar pup to Parvo and then one month later lost the next new pup to parvo as they hadnt adequately disinfected the old pups kennel and run. I have also seen cases where vaccinated pups will be exposed to a severe challenge of Parvovirus, will show some signs of illness but will survive as their antibodies mount successful defence. A peculiar sidebar is the susceptibility of some breeds to Parvo over others due to Pups immune systems maturing at different ages. Rottweilars are proven to be immunonaive up to often five months and have lower survival rates in Parvo epidemics.
The most effective treatment I have available to me as a Vet is intensive intravenous fluid therapy. Treatment is protracted and expensive. Antibiotics, multivitamins, immunostimulants and gastroprotectant drugs are also used but all with mixed results.
The movement of animals is such that this UK epidemic may soon reach Ireland. Lucrative puppy trade is largely unregulated. No one should buy a pup unless shown documentary evidence that the pup has had at least one Parvo vaccination.
Puppy Parvo shots are now only 30 euro at our clinics and booster vaccinations for older dogs only 25 euro on weekday mornings! Yes, I know this is shameless commercial advertising but hey its our website! And on a serious note I would rather prevent Parvo than face the odds-against challenge of treating it.