The Washington Department of Fish and Wildlife (WDFW) reports an increase in probable cases of highly pathogenic avian influenza (HPAI) in wildlife, including mammals.
Recent cases of the H5N1 virus subtype were confirmed in two cougars in Clallam County and a raccoon in Walla Walla.
HPAI has been detected in numerous wild birds this fall, primarily in Western Washington, with additional suspected cases under review.
While the spread to mammals is concerning, WDFW biologists and veterinarians say it is not surprising, as mammals often scavenge infected birds like waterfowl.
Since 2023, WDFW has confirmed H5N1 cases in various mammals, including striped skunks, a bobcat, harbor seals, and raccoons.
Similar cases have been reported across North America in species like red foxes, skunks, and bobcats.
However, there is no indication that HPAI is circulating among wild mammals.
The Centers for Disease Control and Prevention maintains that the risk of HPAI H5N1 to humans is low but emphasizes proper hygiene to minimize exposure. WDFW advises the public to avoid handling sick or dead wildlife and offers the following precautions:
- Wear disposable gloves when handling bird feeders or cleaning harvested game.
- Disinfect equipment, clothing, and tools used during hunting or bird feeding.
- Prevent pets, especially cats, from scavenging or interacting with wildlife.
Those who must handle dead wildlife are urged to wear an N95 mask and gloves, double bag the remains, and dispose of them securely.
WDFW encourages residents to report sick or dead birds or wildlife using their online reporting tool to monitor the spread of the virus. More information on avian influenza, prevention tips, and confirmed cases is available on WDFW’s avian influenza webpage.