Canine Influenza Virus in Montgomery County, Maryland

January 2023- Cases of canine influenza virus (CIV) have been reported by a number of veterinary practices in Montgomery County, Maryland and by other localities within the DMV. Canine influenza is a respiratory disease of dogs caused by a specific strain of type A influenza virus and is highly contagious.

The symptoms of canine influenza are cough, runny nose, eye discharge, fever, lethargy, and poor appetite. The signs range in severity between no signs at all and severe illness sometimes resulting in death.

Canine influenza is thought to spread in aerosol respiratory droplets and contaminated surfaces. It is not transmissible to people; however, people can spread the virus to other dogs on their clothing, equipment, or hands.

If your dog is showing any of the signs above, it could be canine influenza. You should contact your veterinarian immediately for assessment and early supportive treatment. If your dog is diagnosed with canine influenza, you should keep them separated from other animals for at least 28 days. Avoid trips to dog parks, doggy daycare, grooming and boarding facilities.

Most dogs recover within 2-3 weeks, but some may develop secondary bacterial infections leading to more severe illness.

The canine influenza vaccine is not considered a core vaccine for all dogs, however with the current cases occurring in the DMV area, you should speak with your veterinarian about having your dog vaccinated. If you visit dog parks, doggy daycare, or board your dog when traveling, your dog is more at risk for canine influenza.

While the vaccine may not stop your dog from contracting the virus completely, it will lessen the severity and help reduce the spread.

Additional Information:
Canine influenza | American Veterinary Medical Association (
Key Facts about Canine Influenza (Dog Flu) | Seasonal Influenza (Flu) | CDC

Dog Flu Infographic

Anyone that is concerned that an animal is in immediate danger should call 9-1-1. To have an Animal Services Officer Dispatched in a non-emergency situation, patrons can call 301.279.8000. More information about Montgomery County Animal Control Laws can be found at: