Four agricultural workers in southeastern Washington have tested positive for bird flu in preliminary results after having contact with an infected poultry flock at a commercial egg farm. Should these cases be confirmed, they would represent the first human infections in Washington since the virus began its notable rise in birds and animals across the U.S. in 2022. During this time, more than two dozen human cases have been documented in five other states, mostly linked to direct contact with infected animals.
According to health officials, the affected workers have not needed hospitalization. Dr. Steven Krager, local health officer for Benton and Franklin counties, reported that the workers are experiencing mild upper respiratory symptoms, such as a runny nose, sore throat, mild cough, and conjunctivitis, commonly referred to as “pink eye.”
This outbreak is centered at an egg farm in Franklin County with around 800,000 birds, marking the first bird flu incident at a commercial poultry facility this year. Testing conducted on October 15 confirmed the presence of the virus in the poultry, and follow-up tests for symptomatic individuals produced positive results late Saturday.
Officials emphasized that these four positive cases are “presumptive” and are awaiting further confirmation and analysis from the U.S. Centers for Disease Control and Prevention (CDC). The strain identified is known as H5 highly pathogenic avian influenza, which has led to serious outbreaks in poultry, cattle, and various wildlife, including harbor seals in northwest Washington.
The CDC assesses the risk to the general public as low, focusing primarily on individuals who have close interactions with infected animals. Nonetheless, health officials are closely monitoring the situation for any signs that could indicate the virus is evolving towards sustained human-to-human transmission or causing more severe illness. A significant concern is the potential mutation of the virus that could facilitate easier transmission among people.
From 2003 to April of this year, the World Health Organization documented 889 cases and 463 fatalities in 23 countries due to the H5N1 bird flu virus. The five other states reporting human bird flu infections include California, Colorado, Michigan, Missouri, and Texas, with a collective total of 27 cases since April, primarily concentrated in California and Colorado. Out of these, 16 cases have been confirmed as the H5N1 strain.
Bird flu poses a serious risk to poultry, causing rapid illness and death. The U.S. Department of Agriculture has implemented a compensation program for farmers affected by the virus. However, the culling of thousands of birds can be a significant emotional burden for farm owners and workers, especially with the ongoing risk of the virus.
To reduce the spread of the disease, guidelines for personal protective equipment have been established for affected sites, and the state is prepared to provide protective gear upon request. Backyard poultry owners are also advised to stay alert, as state agriculture officials estimate that about 15% of migrating waterfowl carry bird flu, posing contamination risks to local areas.
Fall is considered a critical season for the disease in Washington, as migratory wild birds often interact with those from Asia and Europe, increasing the chances for the virus to spread and evolve. Since 2022, Washington has reported avian influenza in 47 poultry flocks, including the two commercial flocks involved in the current outbreak, one of which comprises about one million birds, while the sizes of domestic flocks have varied widely.
