Canine parvovirus is a highly contagious virus that can affect all dogs, but unvaccinated dogs and puppies younger than four months old are the most at risk.
Certain breeds and types of dogs appear to have a higher risk of parvovirus infection or show more severe illness once infected. These include Rottweilers, Doberman Pinschers, Labrador Retrievers, German Shepherds, Bull Terrier breeds, and Alaskan sled dogs.
Parvo can be found in almost any environment. It is transmitted when a susceptible dog comes in contact with the virus. This includes contact with the feces of an infected dog, or objects that contain the virus (shoes, clothes, bedding, bowls, grass, carpets, floors, etc).
Canine parvovirus (CPV) is a highly contagious viral disease of dogs that commonly causes acute gastrointestinal illness in puppies. The disease most often strikes in pups between six and 20 weeks old, but older animals are sometimes also affected.
“Although there is a window of highest risk between 8 and 16 weeks, adult dogs that are not correctly vaccinated may contract this virus as well,” says Dr. Reinhart. Patients that are diagnosed with parvovirus usually present with vomiting, diarrhea, lack of energy, and poor appetite.
Parvo is a preventable disease, but even vaccinated dogs are not 100% protected from the virus. Vaccines for the parvovirus are recommended for all puppies and are usually given in a series of three shots when the pup is between 6-to-8 weeks old, again at 10-to-12 weeks, and at 14-to-16 weeks.
Parvo may affect dogs of all ages, but is most common in unvaccinated dogs less than one year of age. Young puppies less than five months of age are usually the most severely affected, and the most difficult to treat. Any unvaccinated puppy that shows the symptoms of vomiting or diarrhea should be tested for CPV.
Now, for most dog owners in Australia, parvovirus is a disease that is part of their pet's regular vaccination regime. Since its emergence, parvovirus remains a leading cause of enteritis (small intestine inflammation) in dogs, despite effective vaccines.
Studies have observed that if your Fido is not vaccinated, the chances of him getting parvovirus are very high, and the morbidity rate is 100%. The mortality rate of dogs with parvo is statistically 10% in adult dogs, and 91% in puppies (Appel et al.
This virus is highly contagious and spreads through direct contact with an infected dog or by indirect contact with a contaminated object. Your puppy is exposed to the parvovirus every time he sniffs, licks, or consumes infected feces.
What are the first signs of parvo in a dog? Initial signs that your dog may have contracted parvo are running a fever, lethargy, lack of appetite, and anorexia. These initial signs may progress and can result in vomiting and diarrhea within two days after showing their first symptom.
The Spread of Canine Parvovirus 'Parvo'
The virus is spread through traces of feces from infected dogs. Asymptomatic dogs that are infected but aren't showing symptoms can spread Parvo, as well as dogs with symptoms, and those that have recently recovered from the condition.
Every time your puppy leaves the house, he's exposed to small amounts of viruses. This builds his immunity, slowly and naturally. Don't expose him to an environment with large amounts of viruses. You'll want to avoid dog parks for this reason.
Can vaccinated dogs get parvo? Short answer: YES! Some may think once their dog is vaccinated they can't catch Parvo, but the virus has different strains and reinvents itself. So unfortunately, dogs definitely can still catch the parvovirus.
Can a dog get parvo twice? Once a dog has recovered from parvo, it is unlikely that they will contract the virus again. The immunity from the virus lasts for several years, protecting your dog from reinfection. It is theoretically possible for a dog to get parvo twice, but such chances are very slim.
How does it spread? Parvovirus is highly contagious and can stay on surfaces and in environments for a long period of time—withstanding heat, cold and humidity. Dogs can contract the virus by interacting with infected dogs, or by coming into contact with contaminated faeces, surfaces or environments.
“Dogs who have three to five encounters with the vaccine will typically develop the highest amount of antibodies to protect from infection,” Dr. Burch said. And while some fully-vaccinated dogs can still get parvo — remember, this is rare — the vaccine will usually keep your pup completely safe.
If an older dog does get parvo, it's often a mild case because your older dog has built up a stronger immune system. The parvovirus is everywhere, so over time, your dog will build natural immunity to the virus (whether he's vaccinated or not) by being exposed to it.
Parvo is deadly and dangerous because it acts quickly, so you need to be quicker than the virus. The good news is, with quick reaction and proper veterinary treatment your puppy has a 68–92% survival chance. Furthermore, most puppies that survive the first three to four days make a full recovery.
There is no cure for Parvo in puppies, however, your vet will offer supportive treatments to address symptoms such as vomiting and diarrhea. It's critical that your pup gets enough hydration and nutrition to recover from Parvovirus.
Extremely resilient, parvovirus can survive in the environment for up to nine years, including the ground and soil. It can also withstand most household cleaning products (bleach is an exception), heat, cold and humidity, all of which makes the spread of the virus is hard to control.
Your puppy will vomit and have diarrhea if canine parvovirus is present in their system. Vomit may be clear or a yellow or brown color, and diarrhea will often contain blood and be a light yellow or mustard colored hue.
Vaccinations stimulate the immune system to make a response. In a disease that destroys the immune system, there is nothing left to fight the disease. This is how some dogs can become infected with Parvovirus, and it's not related to vaccine failure or lack of vaccine immunity although it may initially appear this way.