Canine influenza (dog flu) is influenza occurring in canine animals. Canine influenza is caused by varieties of influenzavirus A, such as equine influenza virus H3N8, which was discovered to cause disease in canines in 2004.[1] Because of the lack of previous exposure to this virus, dogs have no natural immunity to it. Therefore, the disease is rapidly transmitted between individual dogs. Canine influenza may be endemic in some regional dog populations of the United States. It is a disease with a high morbidity (incidence of symptoms) but a low incidence of death.[2]
A newer form was identified in Asia during the 2000s and has since caused outbreaks in the US as well. It is a mutation of H3N2 that adapted from its avian influenza origins. Vaccines have been developed for both strains.
The two strains of Type A influenza virus found in canines are A(H3N2) and A(H3N8). Over time, there has been a discovery of sources of transmissions, identification of specific symptoms and the creation of vaccines.[3]
^"Canine influenza". American Veterinary Medical Association. Retrieved 2023-09-14.
^Cite error: The named reference CDC was invoked but never defined (see the help page).
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