The H3N2 Canine Influenza Virus (CIV) is a contagious viral disease that can spread quickly among dogs and has potential to cause severe illness. The largest outbreak we have seen in LA County started in July 2021 and is still being managed and investigated. Since September 2021, over 200 dogs in LA County have been reported to have CIV and over 10 boarding facilities have reported having dogs become ill from CIV.

Our hospital has treated five (5) CIV+ cases from three different boarding facilities in our area.

How is it spread?
The virus is spread through direct contact with respiratory secretions and by contact with contaminated surfaces. The virus is most easily spread when an infected dog is in close contact with other dogs.

Who is at risk?
Because they have no natural immunity to the flu virus, all dogs are at risk of contracting this disease, regardless of age or breed. Dogs that are in close contact with other dogs for any extended period of time are at greatest risk. This includes pets that frequent places such as:

  • Grooming facilities
  • Boarding facilities
  • Dog day care
  • Dog parks
  • Dog beaches
  • Dog shows or events

What are the signs?
Most cases of the flu are mild. However, some pets have required hospitalization and others have unfortunately passed away due to complications from the virus. The severity of the illness varies as it can affect each dog differently. Most common signs of the canine flu include:

  • Persistent cough
  • Sneezing
  • Nasal discharge
  • Fever
  • Decreased energy
  • Decreased appetite

How is it prevented?
The best form of protection against the virus is vaccination. By getting the vaccine, you will help control the spread of infection, reduce the spread of infection, reduce the common symptoms if your dog were to contract CIV, and reduce the risk of your dog developing pneumonia.

If they are getting vaccinated for the first time, your pet will need a series of two injections given three weeks apart. After the appropriate boosters, the CIV vaccine must be given annually to maintain protection.

For more information, visit http://publichealth.lacounty.gov/vet/influenzacanineh3n2.htm