Canine influenza is an important respiratory disease for socially active dogs

Canine influenza viruses (CIV H3N8 and CIV H3N2) cause a respiratory infection in dogs that is often referred to as 'Canine Flu'. Canine influenza virus (CIV) is one of the causes of CIRDC (Canine Infectious Disease Complex) - also called 'Canine Cough' or 'Kennel Cough'. Two different canine influenza viruses have been isolated in the US:

- CIV H3N2

- CIV H3N8

CIV H3N2 just recently emerged in the Chicago outbreak of 2015. This virus is of avian origin and not related to the earlier CIV H3N8 virus, which is of equine origin. Therefore, dogs at risk should be vaccinated against both viruses.

Two dogs
Canine influenza viruses are relatively new viruses, so virtually all dogs are susceptible to infection when they are newly exposed because they have not built up natural immunity. Most dogs that develop CIV infection have a mild illness, but some dogs become very sick and require treatment.

Merck Animal Health offers vaccines against both strains of canine influenza virus.

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Canine Influenza Update

By now you may have heard about the Canine Influenza outbreak in and around the Chicago area, which spread to 23 states within 5 months. Another hot spot was Georgia. The strain found in both outbreaks was H3N2. Merck Animal Health would like to make sure that you have the facts about the disease, and that all personnel treating potentially infected animals know how to protect other dogs from infection. Please surf this website for information.

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Even dogs get the flue

States with reported cases of Canine Influenza

More and more cases of canine influenza have been reported across the country.

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