Bird Flu Detected in Michigan Poultry as H5N1 Spreads Across US During Spring Migration

Highly Pathogenic Avian Influenza, or bird flu, continues to circulate in the US with a fresh detection in Michigan's commercial poultry. On March 16, the Michigan Department of Agriculture and Rural Development confirmed HPAI in a Kent County flock, the second such case there since 2022. Officials urge bird owners to protect flocks from wild birds during spring migration by enclosing outdoor areas, disinfecting gear, and avoiding shared equipment, as the virus spreads via contact, contaminated items, or caretakers. Public health risk remains low per the CDC, with proper cooking advised for poultry and eggs.

In California, the H5N1 outbreak among marine mammals at Ano Nuevo State Park in San Mateo County persists but appears limited. UC Davis researchers report 16 dead elephant seal pups, plus a sea otter and sea lion confirmed with the Eurasian strain, first detected there late February. Additional cases are in testing, but most adult seals have migrated away, offering hope for containment. No human transmission from seals noted, though officials warn against contact with sick wildlife.

Nationally, CDC's latest FluSurv-NET data through March 7 shows no new H5N1 human cases, with seasonal flu declining but 101 pediatric deaths this season, mostly unvaccinated. Globally, no major headlines in the last day, though vigilance rises with migrating birds.

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