If a puppy is exposed to canine parvovirus during this gap in protection, it may become ill. An additional concern is that immunity provided by a mother's milk may interfere with an effective response to vaccination. This means even vaccinated puppies may occasionally be infected by parvovirus and develop disease.
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.
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.
Overwhelming viral load
Even if your puppy is vaccinated, and has created antibodies to fight off the infection, she can still become infected with the virus. If you live in a high-risk area or have met a Parvovirus-infected dog your puppy can pick up a large amount of virus material from this interaction.
“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.
Puppies are at the greatest risk for parvo between the ages of 6 weeks to 6 months. Puppies can receive their parvo vaccinations at 6, 8 and 12 weeks of age. They must receive a full series of vaccinations to ensure complete immunity. Puppies require a parvo booster vaccine between 14 and 16 weeks of age.
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.
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.
How Long After the Parvo Vaccine Is a Dog Protected? The canine parvovirus vaccine typically goes into effect within three to five days and is considered to last at least three to four years according to studies. This is why adult dogs are typically vaccinated against parvo every three years.
Even if your veterinarian does everything right, there is still a chance that your puppy won't survive parvo. The near-death signs of parvo include severe lethargy, continuous bloody diarrhea, anorexia, and bloody vomiting. You may not want to admit it to yourself, but this is the point of no return.
Full recovery may take quite a while depending on the severity of the disease and the damage it has done. Dogs that can recover from infection are sick for five to 10 days after symptoms begin. It is very important that puppies with parvovirus receive adequate nutrition so that their intestines can heal.
A pet infected with parvovirus may develop a fever and behave lethargically, possibly refusing food within the first few days of infection. Within 24-48 hours, copious vomiting and diarrhea present, often containing blood in the later stages.
Dogs with this virus can vomit anything from yellow vomit through to dark brown, and you may even see some streaks of blood in it. Blood can be seen due to the inflammation in the digestive tract, caused by repeated vomiting. This sign again is not specific to parvovirus and can be seen in other health conditions too.
Once a dog or puppy is infected, there is an incubation period of three to seven days before the onset of first symptoms. Inside the dog, CPV needs the help of rapidly dividing cells in order to successfully cause disease, and the virus usually begins by attacking the tonsils or lymph nodes of the throat.
Once a puppy has symptoms of parvo, if left untreated they can die within 48 - 72 hours. It can be simply diagnosed and survival is possible if treated soon enough. If left untreated the mortality rate is as high as 91%.
How Long Does Distemper/Parvovirus Vaccine Last? After the initial puppy series and adult booster one year later, the distemper/parvo vaccine lasts at least 3 years according to current research.
Common lab tests to detect canine parvovirus include antigen tests, the polymerase chain reaction (PCR) test, and blood count evaluations. Antigen tests can either be performed at your vet's office, providing rapid results, or be sent out to a lab for testing.
According to Utah Veterinary Clinics, parvo can live in the environment for six months to one year.
Symptoms of Parvo
Your dog will not drink water nor eat, and very soon the pup will be stretched out and down on the ground, unable to get back up. They will become limp, weak, and unable to hold themselves up. Parvovirus, when left untreated, is often fatal. It requires veterinary oversight.
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.
In the U.S., people tend to get infected with parvovirus B19 more often in late winter, spring, and early summer. Mini-outbreaks of parvovirus B19 infection occur about every 3 to 4 years. Since parvovirus B19 only infects humans, a person cannot get the virus from a dog or cat.
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).
The best and most effective disinfectant against viruses (including parvoviruses) is BLEACH. One part bleach is mixed with 30 parts water and is applied to bowls, floors, surfaces, toys, bedding, and anything contaminated that is colorfast or for which color changes are not important.
Some find that there is a distinct metallic smell to feces infected with parvovirus. If left untreated, parvo cases can escalate quickly and dehydrate the dog to the point of no return.
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.