Avian Influenza | Department of Agriculture
AI viruses are divided into two groups based on their ability to cause disease in poultry: high pathogenicity (HPAI) or low pathogenicity (LPAI). HPAI results in high death rates (up to 100% mortality within 48 hours) in some poultry species. LPAI also causes outbreaks in poultry but is not generally associated with severe disease.
2022–2024 Detections of Highly Pathogenic Avian Influenza
Feb 9, 2022 · With the recent detections of the Eurasian H5 strain of highly pathogenic avian influenza (HPAI) in wild birds and domestic poultry in the United States, bird owners should …
Highly Pathogenic Avian Influenza A(H5N1) Virus: Interim ...
Dec 26, 2024 · CDC considers HPAI A (H5N1) viruses to have the potential to cause severe disease in infected humans and recommends the following: Avoid exposure to sick or dead animals.
HPAI in Poultry | Department of Agriculture
In February 2022, Highly Pathogenic Avian Influenza was detected in wild birds and poultry in the United States. In Colorado, CDA leads the response to the virus, in collaboration with federal, state, and local partners.
Avian flu in humans - Department of Public Health & Environment
Jan 7, 2025 · Avian flu is a virus that naturally spreads among wild birds. It can also infect poultry and other kinds of animals, including cows. While the risk to the general public is low, avoid direct contact with wild birds and observe them only from a distance. Wild birds can have avian flu even if they don’t look sick.
USDA Reported H5N1 Bird Flu Detections in Poultry - CDC
Jan 17, 2025 · Highly pathogenic avian influenza (HPAI) A (H5) viruses have been detected in U.S. wild aquatic birds, commercial poultry and backyard or hobbyist flocks beginning in …
Highly Pathogenic Avian Influenza Emergency Response
Jan 16, 2025 · Learn more about our response to an HPAI outbreak. Find detailed resources concerning an HPAI outbreak. APHIS develops emergency management policies to ensure the effective response and management of disease outbreaks, like highly pathogenic avian influenza.
Health officials confirm human cases of avian flu in Colorado …
Denver (July 14, 2024) — In coordination with the Colorado Department of Agriculture, the State Emergency Operations Center, and Centers for Disease Control and Prevention, the Colorado Department of Public Health and Environment is now reporting a total of five human cases of avian influenza in workers responding to the avian flu outbreak at a ...
Confirmations of Highly Pathogenic Avian Influenza in Commercial …
Jun 20, 2024 · APHIS confirmed highly pathogenic avian influenza (HPAI) in a commercial flock in the United States on February 8, 2022. Since then, we have worked swiftly to identify and respond to detections and mitigate the virus’ impact on U.S. poultry production and trade.
CDC Confirms Human Cases of H5 Bird Flu Among Colorado …
July 14, 2024 – Four human cases of highly pathogenic avian influenza (HPAI) A (H5) (“H5 bird flu”) virus infection in the state of Colorado have been confirmed by the Centers for Disease Control and Prevention (CDC).