Highly Pathogenic Avian Influenza (HPAI) Outbreak Confirmed in Argentina
A new case of highly pathogenic avian influenza (HPAI) H5 has been detected in a backyard poultry farm in Azul, Buenos Aires province, Argentina, prompting swift action from the National Agri-Food Health and Quality Service (SENASA). This outbreak underscores the ongoing global threat of HPAI and the importance of proactive surveillance and biosecurity measures.
Current Situation and SENASA Response
SENASA confirmed the positive case on February 25, 2026, in a small-scale poultry operation. To contain the potential spread of the virus, a prevention area (PA) has been established around the affected farm. Within this zone, stringent biocontainment protocols and epidemiological screenings will be implemented. These measures include visiting properties within the area to assess potential links to the initial outbreak and monitor for signs of infection.
Understanding Highly Pathogenic Avian Influenza (HPAI)
HPAI, specifically the H5N1 subtype, is a highly contagious viral disease affecting birds. The current circulating strain in the Americas belongs to clade 2.3.4.4b 1. While primarily impacting poultry, HPAI can also infect wild birds and, in rare cases, mammals 2. The virus can cause severe illness and high mortality rates in infected birds.
Global Spread and Recent Cases
The H5N1 clade 2.3.4.4b virus initially spread to North America in 2021 and subsequently reached Central and South America by October 2022 1. As of September 20, 2023, 17 countries in the Americas had reported cases of HPAI in birds and mammals 1. There have been limited reports of human infection, with cases documented in Ecuador and Chile in early 2023 1. Notably, epidemiological surveillance in Argentina has not detected any cases of HPAI in humans to date 1.
Recommendations for Poultry Producers
SENASA strongly advises all poultry producers to reinforce their biosecurity measures. This includes diligent management practices, enhanced hygiene protocols and strict biosafety procedures. Producers should immediately report any unusual increases in bird mortality or the observation of neurological, digestive, or respiratory signs to the health organization. Early detection and reporting are crucial for effective outbreak control.
Further Information
For more detailed information, please visit the official avian influenza microsite provided by SENASA.
Key Takeaways
- A new outbreak of HPAI H5 has been confirmed in a backyard poultry farm in Azul, Argentina.
- SENASA has established a prevention area and implemented biocontainment measures.
- The circulating virus is the H5N1 clade 2.3.4.4b subtype.
- Poultry producers are urged to enhance biosecurity and report any suspicious signs.