Parvovirus (parvo) in dogs
Parvo is a highly contagious virus that attacks the gut and immune system. It mostly affects unvaccinated puppies and can be fatal without treatment.
Last updated: October 2026 · 4 sources · see sources
Signs to watch for
- Severe vomiting
- Bloody diarrhea
- Not eating
- Lethargy
- Fever or low body temperature
Trouble breathing, collapse, repeated vomiting, not peeing, or a seizure that lasts more than a few minutes needs a vet right away. See when to see a vet.
How vets diagnose it
A quick in-clinic fecal antigen (SNAP) test usually confirms it, along with bloodwork to check white cells. [4]
How it's treated
Treatment is supportive care: IV fluids, anti-nausea medicine, antibiotics and nutrition, usually in the hospital. Outpatient protocols exist when hospital care isn't possible. [4]
Medicines your vet may mention: Cerenia, Ondansetron (Zofran). We don't list doses; your vet will decide what fits your pet.
What it costs to diagnose and manage
| Item | Typical US price | Src |
|---|---|---|
| Diagnosis (exam and tests) | $100–$300 | [1] |
| Treatment | $2,000–$5,000 | [1] |
| Parvo hospitalization, per night (CareCredit) | $600 | [2] |
| Parvo treatment (Colorado State University) | $2,000 to upwards of $10,000 | [3] |
These are typical US ranges from the sources listed. Your pet's costs depend on how severe things are, the tests your vet recommends, your pet's size and where you live. Ask your vet for a written estimate.
Outlook
Most puppies that get hospital treatment survive. Vaccination is the best protection. [4]
Common questions
What is parvovirus (parvo) in dogs?
Parvo is a highly contagious virus that attacks the gut and immune system. It mostly affects unvaccinated puppies and can be fatal without treatment.
What are the signs of parvovirus (parvo)?
Common signs include: severe vomiting, bloody diarrhea, not eating, lethargy, fever or low body temperature.
How do vets diagnose parvovirus (parvo)?
A quick in-clinic fecal antigen (SNAP) test usually confirms it, along with bloodwork to check white cells.
How is parvovirus (parvo) treated?
Treatment is supportive care: IV fluids, anti-nausea medicine, antibiotics and nutrition, usually in the hospital. Outpatient protocols exist when hospital care isn't possible.
How much does parvovirus (parvo) cost to treat?
Diagnosis (exam and tests): $100–$300; Treatment: $2,000–$5,000; Parvo hospitalization, per night (CareCredit): $600; Parvo treatment (Colorado State University): $2,000 to upwards of $10,000. Costs vary with severity, tests, your pet's size and where you live.
Related
This page is general information for pet owners, not veterinary advice. Talk to your vet about your own pet.