Washington Resident Dies from Rare H5N5 Avian Influenza

A Grays Harbor County resident in Washington state has died from complications associated with the H5N5 avian influenza virus, according to the Washington State Department of Health. This case represents the first recorded human infection with this particular strain worldwide. The individual, an older adult with underlying health conditions, had been hospitalized in King County since early November.

The patient maintained a backyard flock of mixed domestic birds, which had exposure to wild birds. Health officials identified avian influenza virus in the flock's environment, suggesting that contact with these birds or their surroundings was the probable source of infection.

Despite this development, the risk to the general public remains low. No other individuals connected to the case have tested positive for avian influenza, and there is no evidence of human-to-human transmission. Public health authorities continue to monitor those who had close contact with the patient for any signs of illness.

Avian influenza, caused by influenza type A viruses, naturally occurs in wild aquatic birds and can infect other bird species and occasionally mammals. While human infections are rare, they can occur through direct contact with infected animals or contaminated environments.

Health officials advise individuals with backyard poultry to avoid contact with sick or dead birds and to report any illness in poultry to the Washington State Department of Agriculture. Additionally, it is recommended that people who may be exposed to domestic or wild birds receive a seasonal flu vaccine to reduce the risk of co-infection with human and avian influenza viruses.