Canine parvovirus is a highly contagious, potentially fatal disease that affects dogs, particularly young puppies and those that are not vaccinated. Sadly, it is still seen regularly in Ireland.
Understanding how parvovirus spreads, recognising the signs early and keeping vaccinations up to date are key to protecting dogs from this devastating illness.
Parvovirus, often called ‘parvo’, attacks the lining of a dog’s intestines and interferes with their ability to absorb nutrients. It also affects cells in the bone marrow that help fight infection.
As a result, infected dogs can become extremely weak, dehydrated and unable to defend themselves against other illnesses. Puppies under six months of age are especially vulnerable because their immune systems are still developing.
Parvovirus spreads very easily between dogs. It is passed through bodily fluids, particularly faeces and vomit, and can survive in the environment for many months or even years.
Dogs can pick it up from contaminated ground, grass, kennels, bowls, leads, toys or even from shoes and hands that have encountered the virus. This means dogs can be exposed almost anywhere other dogs have been.
After exposure, it can take up to a week before symptoms appear, during which time a dog may unknowingly spread the virus to others.
Dogs with parvovirus often become unwell very quickly.
Common signs include:
Some dogs develop a high or very low temperature, pale gums, stomach pain or may collapse. In severe cases, sudden death can occur. Any combination of these symptoms is an emergency and requires immediate veterinary attention.
Unvaccinated dogs and puppies are at greatest risk. Puppies between six weeks and six months old can deteriorate rapidly and are more likely to die from dehydration or secondary infections. Outbreaks are more common in areas with lower vaccination rates, including towns and cities with large dog populations.
If you think your dog may have parvovirus, contact your vet immediately.
Let them know what symptoms you have noticed and whether your dog may have been exposed to other dogs.
Keep your dog away from all other animals and follow your vet’s instructions carefully. Early treatment greatly improves the chance of survival.
Parvovirus does not infect humans, but people can carry the virus on their clothes, shoes or hands and pass it between dogs. The strain of parvovirus that affects dogs is different from the one that affects humans. Cats cannot catch canine parvovirus from dogs.
There is no medication that kills the parvovirus itself. Treatment focuses on supporting the dog while their immune system tries to fight the infection. Most dogs need to be hospitalised for several days so they can be closely monitored.
Treatment usually includes fluids given through a drip to prevent dehydration, medication to control vomiting and nausea and antibiotics to protect against secondary infections.
Dogs with parvo are cared for in isolation wards to prevent the virus spreading to other patients.
Dogs that survive parvovirus often need a period of careful nursing at home, once they are discharged from a veterinary clinic. They may still be infectious for several weeks, so they must be kept away from other dogs and public areas.
Your vet will advise on feeding small amounts of suitable food, encouraging drinking, monitoring bowel movements and ensuring plenty of rest and warmth. Good hygiene and thorough cleaning are essential during recovery.
The outlook depends on how quickly treatment begins and the dog’s age and overall health.
Dogs that receive prompt intensive care have a much better chance of survival, but sadly some dogs and many young puppies do not recover even with treatment.
Without veterinary care, parvovirus is almost always fatal.
Vaccination is the only reliable way to protect dogs against parvovirus.
Puppies should begin their vaccinations from around six weeks of age and complete a full course, followed by a booster one year later.
Adult dogs need regular boosters throughout their lives, as advised by their vet.
Until a puppy is fully vaccinated, they should be protected from high-risk environments and contact with unvaccinated dogs.
Treating parvovirus can be very expensive due to the need for intensive care and hospitalisation over several days.
Vaccination is far less costly and is a vital investment in your dog’s health and wellbeing.
Parvovirus is a frightening disease, but it is largely preventable. Keeping your dog’s vaccinations up to date and seeking immediate veterinary care if you notice worrying symptoms can save lives.
If you have any concerns about parvovirus or your dog’s vaccination schedule, speak to your vet or veterinary nurse for advice and support.
