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- Highly Pathogenic Avian Influenza A (H5N1) Virus: Interim . . .
In the United States, HPAI A (H5N1) virus detections in wild birds have been reported in 50 states or territories, and outbreaks in commercial poultry or backyard bird flocks associated with high mortality have been reported in 48 states since February 2022
- H5N1 Hpai – Resources Guidance | APHIS
The H5N1 strain of highly pathogenic avian influenza (HPAI) is present in wild birds worldwide and is causing outbreaks in U S domestic birds and dairy cattle
- CDFA - Animal Health - Avian Influenza
AI viruses can be classified as either low pathogenic avian influenza (LPAI) or high pathogenic avian influenza (HPAI) based on the severity of the illness they cause in poultry Most AI strains are classified as LPAI and cause few clinical signs in infected birds
- Avian Influenza - U. S. Fish Wildlife Service
Highly pathogenic avian influenza (HPAI) viruses can severely affect domestic animal, wildlife, and sometimes human health Outbreaks of Eurasian lineage highly pathogenic avian influenza viruses have been impacting domestic poultry and wild bird populations in Europe and Asia since August 2020
- Highly Pathogenic Avian Influenza - Cornell University
In New York, 2025 started off with an increase in bird cases of highly pathogenic avian influenza (HPAI) We found H5N1 in nearly 250 birds across 30 species thus far, waterfowl and raptors being the most affected
- Biosecurity Alert: HPAI Update May 2026 - Penn State Extension
The latest updates on the state of the highly pathogenic avian influenza outbreak and reminders to keep practicing good biosecurity
- A comprehensive review of highly pathogenic avian influenza (HPAI) H5N1 . . .
Avian influenza viruses (AIVs) are globally challenging due to widespread circulation and high mortality rates Highly pathogenic avian influenza (HPAI) strains like H5N1 have caused significant outbreaks in birds
- Avian Influenza - APIC
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