Canine influenza is a newly emerging infectious disease caused by a “flu” virus. In dogs, a highly contagious strain of the influenza A virus known as H3N8 is able to cause respiratory illness. Canine influenza virus only affects dogs, although it originated in horses.
How contagious is canine influenza?
Just like the human “flu,” canine influenza is highly contagious. In fact, unless a dog has already had the illness and recovered, virtually every dog exposed to the virus will become infected. This is because the virus is relatively new and dogs have no natural immunity to it. While 100% of dogs are susceptible to influenza infection, about 80% will become ill from the virus. The other 20% of infected dogs will show no signs of infection but can still spread the virus to other dogs. The incubation period is usually two to four days from exposure to onset of clinical signs. The highest amounts of viral shedding occur during this time; therefore, dogs are most contagious during this period when they are not exhibiting signs of illness. Virus shedding decreases dramatically during the first 4 days of illness but may continue up to 7 to 10 days in some dogs.
What are the signs of canine influenza?
Information for Consumers
EPA is aware of counterfeit pet pesticides designed to look like legitimately registered pesticide products. The information on this page is intended to help consumers avoid unregistered pet products.
In addition, EPA may take civil or criminal enforcement action against those who sell, distribute, or import unregistered or counterfeit pet products, and has done so in the past.
Purchasing Pet Drugs Online: Buyer Beware
"Discount pet drugs—no prescription required" may appeal to pet owners surfing the Web, but FDA experts say it can be risky to buy drugs online from sites that tout this message and others like it.