Dr. Cynda Crawford, the veterinary immunologist who first isolated it, describes the contagion as producing in dogs "a moist, productive cough that ends in a gagging response, that will persist for one to four weeks, despite treatment with antibiotics or cough suppressants. Some dogs develop a thick, yellow discharge from the nose. A very few dogs will spike a high fever, between 105 to 107 degrees Fahrenheit. They become lethargic and weak, with rapid, shallow breathing. This is likely to progress to pneumonia." She believes as many as 10 percent of the dogs infected by it will die of the disease, but others have estimated the potential death rate as between 1 and 10 percent, with the higher percentage applying to very young, very old, or infirm dogs.
No vaccine against this canine contagion exists at this time, although one is under development, and a vaccine for the equine version of this flu already exists. Presence of the virus in dogs can be confirmed only through blood tests performed at the Cornell University College of Veterinary Medicine. Results of such blood screens take as long as two weeks.
Dr. Crawford recommends keeping dogs showing symptoms of respiratory disease at home and away from other dogs for up to two weeks. The CDC, which is tracking the disease, issued no official recommendations.
Because the symptoms of this as yet unnamed virus somewhat mimic bordetella, a less virulent illness commonly known as kennel cough, it is hard to ascertain how widespread the flu has become. On the flipside of that confusion, vets in various parts of the country have been thrown into a panic when encountering run-of-the-mill kennel cough in any of their clients, fearing they are instead confronting cases of the new flu.
The Animal Health Diagnostic Center at Cornell University inserted a caution against such hair trigger diagnosis within a larger advisory about the potential for the flu to have spread to the state of New York: "One should not lose sight of the fact that all respiratory infections in dogs are not due to canine influenza virus. Adhering to the 'band wagon' approach could result in the failure to appropriately treat dogs with infections previously known to cause respiratory problems in dogs."
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