The incubation period for the virus is one to two weeks, although there are scattered reports of incubation periods as short as four days. Infected dogs can shed virus for a few days before they become sick and for an additional seven days after they start showing signs of infection.
The incubation period for parvo is 3 to 7 days after exposure. Infected dogs shed the virus in their feces. The quantity of virus particles shed is the highest during the first two weeks of exposure. Clinical signs include loss of appetite, fever, lethargy, vomiting, severe diarrhea, which may contain blood.
The highest risk of death occurs around 24-72 hours after you see the symptoms of parvo in dogs.
If your dog is being treated by a veterinarian and lives through the first four days after they start showing symptoms, there is a good chance that they will recover from the disease. It can take approximately a week for dogs to recover from Parvo.
If they survive the infection, signs of long term cardiac damage may not surface for several years, but its victims can later suffer from congestive heart failure. With intestinal Parvo, it is not the virus itself which kills the patient, but the effects of dehydration and secondary infection.
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.
Parvo may affect dogs of all ages but is most common in unvaccinated dogs less than one year of age. Young puppies under five months of age are usually the most severely affected and difficult to treat. Any unvaccinated puppy showing severe vomiting or diarrhea should be tested for CPV.
Only extremely cold temperatures and bleach (sodium hypochlorite) can kill the virus. Because parvo is usually killed or dormant over the winter, most cases are in the warmer spring and summer months.
Symptoms of Parvo
Symptoms of intestinal parvo begin to show from three to 10 days after the infection. Some of the symptoms evident in your puppy include: Vomiting. Dehydration.
Puppies are vaccinated against parvo at approximately 6, 8, and 12 weeks of age. They are vulnerable to the disease until they have received all three shots in their vaccination series, which means owners need to take extra precaution during this time to prevent their puppies from contracting the virus.
The average recovery time for parvo in dogs is between 5 to 10 days depending on the severity of the infection. Since the immune system is very weak during this time, it's possible the dog may pick up a secondary infection that can lead to an increase in the recovery time.
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.
Commonly called “parvo”, the organism is very stable in the environment, able to withstand freezing temperatures and many disinfectants to survive as long as seven months in a contaminated area.
Some infected dogs never develop clinical signs but do continually shed the virus. “Parvovirus is everywhere and you cannot 100% prevent exposure,” warns Dr. Reinhart.
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 first sign of parvo for puppies is often lethargy, lack of appetite, and a fever. Canines will begin to suffer from vomiting and diarrhea as the virus progresses, and can experience dehydration and a high heart rate as a result.
Some of the signs of parvovirus include lethargy; loss of appetite; abdominal pain and bloating; fever or low body temperature (hypothermia); vomiting; and severe, often bloody, diarrhea. Persistent vomiting and diarrhea can cause rapid dehydration, and damage to the intestines and immune system can cause septic shock.
This illness is expensive to treat and ravages a dog's body – symptoms often include severe vomiting and diarrhea. 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.
Parvovirus can survive months on surfaces such as concrete so infections can still be transmitted to new dogs after your dog is recovered. This is especially important to consider when thinking about bringing another puppy into your home, either to add to your family or even if they are just visiting.
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 is a preventable disease, but even vaccinated dogs are not 100% protected from the virus.
If possible, flush the yard with water and allow to dry. Then apply a disinfectant that is effective with organic material, such as AHP or potassium peroxymonosulfate. These can be used with a pesticide sprayer or hose-end sprayer at the proper dilution to saturate the outside area.
The best household cleaner to use to kill parvovirus is bleach (1 part bleach to 30 parts water). It should be used on hard surfaces including tiles, concrete, paving bottoms of shoes etc – leave the bleach on the surface at least 10-15 minutes. Anything that can be washed in bleach should be.
A University of Sydney study has found that canine parvovirus (CPV), a highly contagious and deadly disease that tragically kills puppies, is more prevalent than previously thought with 20,000 cases found in Australia each year, and nearly half of these cases result in death.
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%. It is very similar to panleukopenia in cats.