Canine Influenza

Idexx Laboratories reports that the canine influenza case load increased from 250 to 413 positive cases since the last weekly report. There has been an expansion within the primary area of the San Francisco South Bay, expansion in Reno, Nevada, and a further expansion to the South with the first positive case in Los Angeles.

  • Case load since the index case on December 27th has increased to 413 PCR positive H3N2 cases, including 85 (up from 7) in Reno Nevada.
  • The local outbreak in Fresno, first detected January 23d, has now increased to 53 (up from 31) H3N2 positive cases.
  • This outbreak is solely caused by H3N2: the previous canine influenza virus H3N8 is not contributing to the California outbreak; the last H3N8 positive US case was detected in August 2017.

Canine influenza virus (CIV) has been confirmed in dogs across the states and the District of Columbia, and its prevalence is rising. More and more clients are inquiring about it at veterinary offices each day. To get answers to some of the most common questions, and to refresh knowledge about CIV, the following links provide current and accurate information:

Key Facts About Canine Influenza (Dog Flu) (CDC)

Canine Influenza (Orange County Animal Care)

Canine Influenza – What You Need to Know (Merck Animal Health)

Canine Influenza Backgrounder (AVMA)

Los Angeles Department of Public Health Canine Influenza Page

UC Davis Vaccination Guidelines

American Animal Hospital Association Vaccination Guidelines

CSFPH Canine Influenza Resource Page

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