While traveling through Northern Michigan the last few days, the newscasters have been running an blurb about the news reporting they are doing in the mornings about the
H3N8 influenza in dogs. I started wondering what was up with that and became anxious to see if anything had been happening while I've been out of WiFi range.
I found a couple of places that might give some information so that we all can become more well informed. First, there is some information about the vaccine for dogs and then I link to a blog by Cynda Crawford, D.V.M., Ph.D who blogs at the New York Times.
New Dog Vaccine for H3N8 Flu from About.com Veterinary Medicine.
Thursday July 2, 2009
Originally discovered in 2004 , this canine influenza virus is believed to have jumped from horses to dogs in Florida. This virus, H3N8, is a subtype of the influenza A virus, a highly contagious pathogen that can cause disease by itself or in conjunction with other respiratory pathogens.
Transmission: As with most infectious respiratory diseases, dogs housed in close quarters (kennels, shelters) and situations where there is lots of "dog traffic" (dog day care, grooming/training, vet clinics) are most at risk. There is no evidence to date that this virus infects humans.
Clinical signs: Similar to other influenza infections, this virus causes respiratory signs of sneezing, nasal discharge and coughing. Fever may occur, but not often.
Diagnosis: Because these signs are the same as many other respiratory infections, a special test is necessary to diagnose the H3N8 virus. This test is called a PCR test (polymerase chain reaction) and usually two
samples are submitted over a 2 week period to positively identify infection.
H3N8 Treatment: Treatment for this disease is supportive; making sure that the dog maintains appetite, extreme coughing is controlled, and monitoring for fever or development of more serious complications, such as pneumonia. Your veterinarian
will determine if pneumonia is a risk and if antibiotics for secondary bacterial infection are warranted.
H3N8 Vaccine: The U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS) has conditionally approved the first vaccine for the canine H3N8 virus on June 23, 2009. The canine influenza vaccine (CIV) is made from a
killed virus.
From APHIS: (read entire release here)
Studies indicate that the vaccine can reduce the incidence and severity of lung lesions, as well as the duration of coughing and viral shedding. The product is administered by injection, and is recommended for use in healthy dogs at six weeks of age or older as an aid in the control of disease associated with canine influenza virus infection.
Next I looked at an article by Cynda Crawford D.V.M., Ph.D who writes a blog for the New York Times. In it she has some excellent information which I have provided some synopsis of it below. If you want to know more, I highly recommend it to you.
10 Things to Know About the H3N8 Dog Flu
By CYNDA CRAWFORD, D.V.M., PH.D.
Micah Albert for The New York Times - Who’s at risk from canine influenza?
Dr. Cynda Crawford, clinical assistant professor in the Maddie’s Shelter Medicine Program at the University of Florida College of Veterinary Medicine in Gainesville, recently answered dozens of readers’
questions on the Consults blog, “The Dog Flu Virus: Are You or Your Pet At Risk?” Many readers had questions about flu symptoms, how the virus is spread and whether their pets should receive the newly
approved vaccine for the disease. Here are 10 things Dr. Crawford believes everyone should know about canine influenza and the risks to pets and people.
Who’s at risk from canine influenza?
Dr. Cynda Crawford, clinical assistant professor in the Maddie’s Shelter Medicine Program at the University of Florida College of Veterinary Medicine in Gainesville, recently answered dozens of readers’ questions on the Consults blog, “The Dog Flu Virus: Are You or Your Pet At Risk?” Many readers had questions about flu symptoms, how the virus is spread and whether their pets should receive the newly
approved vaccine for the disease. Here are 10 things Dr. Crawford believes everyone should know about canine influenza and the risks to pets and people.
What is canine influenza?
Canine influenza is a highly contagious respiratory infection of dogs caused by a novel influenza virus that was first discovered in 2004. We do not use the general term “dog flu” because it could refer to any flu-like illness in dogs due to various causes. Rather, canine influenza is a specific disease caused by a particular subtype, H3N8, of the influenza A virus.
Where does canine influenza occur?
Canine influenza has been documented in 30 states and the District of Columbia. At this time, the canine influenza virus is very prevalent in many communities in Colorado, Florida, New York and Pennsylvania. There is no evidence that canine influenza H3N8 is currently infecting dogs in other countries.
What type of infection does canine influenza virus cause?
Like influenza viruses that infect other mammals, canine influenza virus causes an acute respiratory infection in dogs. It is one of several viruses and bacteria that are associated with canine infectious
respiratory disease, or what’s commonly referred to as “kennel cough.” The canine influenza virus can cause respiratory disease by itself or along with other canine respiratory pathogens. Unlike human influenza, canine influenza is not a “seasonal” infection. Infections can occur year round.
What are the symptoms and clinical signs of canine influenza?
Like influenza viruses in other species, canine influenza virus causes a flu-like illness consisting of cough, sneezing and nasal discharge (”runny nose”). Fever can also occur, but it is usually transient and rarely
noticed by pet owners. There are no clinical signs that distinguish canine influenza from other respiratory infections. That is why diagnostic tests must be performed to determine the cause of respiratory infections in dogs. Virtually all dogs exposed to the canine influenza virus become infected; about 80 percent develop a flu-like illness, while another 20 percent do not become ill. Fortunately, most dogs recover within two weeks without any further health complications. However, some dogs progress to pneumonia, which is usually due to secondary bacterial infections. While the death rate for canine influenza is very low, the secondary pneumonia can be life-threatening in some cases. There is no evidence that dogs of particular age or breed are more susceptible to developing
pneumonia from canine influenza.
Who is susceptible to canine influenza?
Because canine influenza is due to a virus that is novel to the canine population, dogs lack preexisting immunity to the virus. Dogs of any breed, age or vaccination status are therefore susceptible to infection. It is likely that dogs that have recovered from infection retain immunity to re-infection for an undetermined time period, although studies have not verified for how long.
Canine influenza is most likely to spread in facilities where dogs are housed together and where there is a high turnover of dogs in and out of the facility. Dogs in shelters, boarding and training facilities, day care centers, veterinary clinics, pet stores and grooming parlors are at highest risk for exposure to the virus, especially if these facilities are located in communities where the virus is prevalent. Dogs that mostly stay at home and walk around the neighborhood are at low risk. Canine influenza virus does not infect people, and there is no documentation that cats have become infected by exposure to dogs with canine influenza. Nor is there any evidence that the canine virus can infect birds.
How is canine influenza transmitted?
As with other respiratory pathogens, the most efficient transmission occurs by direct contact with infected dogs and by aerosols generated by coughing and sneezing. The virus can also contaminate kennel surfaces, food and water bowls, collars and leashes, and the hands and clothing of people who handle infected dogs. Fortunately, the virus is easily inactivated by washing hands, clothes and other items with soap and water.
How is canine influenza treated?
Since canine influenza is a viral infection, treatment consists mainly of supportive care while the virus runs its course, much like for human influenza. Dog owners should consult with their veterinarians if they think their dog has canine influenza.
Is canine influenza contagious?
Like influenza infections in other species, canine influenza is highly contagious. Infected dogs shed virus in their respiratory secretions for 7 to 10 days, during which time the dog is contagious to other dogs. Infected dogs that do not show clinical signs are also contagious.
How is canine influenza diagnosed?
Canine influenza cannot be diagnosed by clinical signs because all of the other respiratory pathogens cause similar signs of coughing, sneezing and nasal discharge. A vet must conduct tests to determine diagnosis
Is there a vaccine for canine influenza?
In May 2009, the United States Department of Agriculture approved for licensure the first influenza vaccine for dogs. The vaccine was developed by Intervet/Schering Plough Animal Health Corporation.
The canine influenza vaccine contains inactivated whole virus, so there is no chance that the vaccine itself can cause respiratory infections.
Dog owners should consult with their veterinarian to determine whether their dog’s lifestyle includes risk for exposure to C.I.V., and the protection provided by the canine influenza vaccine. The vaccine is not yet available in veterinarians’ offices, and the price has not yet been set.