Avian Influenza Outbreak in Buenos Aires: Updates and Prevention Measures

A new case of highly pathogenic avian influenza (HPAI) H5 has been confirmed in a poultry establishment in the Bolívar district, Buenos Aires province, Argentina. This outbreak has prompted swift action from health authorities to contain the virus and prevent further spread, with measures including the establishment of control and surveillance zones, and increased biosecurity protocols.

Confirmation and Initial Response

The diagnosis was made after analyzing samples at the National Laboratory of the National Service of Animal Health and Quality (SENASA) as reported on March 8, 2026. Upon confirmation, authorities immediately activated contingency plans for avian diseases, aiming to protect other farms and production systems. The case has also been reported to the international health community to facilitate global monitoring of the disease.

Control and Surveillance Zones

To limit the spread of the virus, SENASA has established a Sanitary Control Zone encompassing a 3-kilometer perifocal area around the affected establishment, and an additional 7-kilometer surveillance zone as detailed by Noticias Ambientales. Within these zones, intensive controls and stricter sanitary restrictions are in place. These measures include increased epidemiological monitoring and tracking of other nearby production units.

Actions being taken include the depopulation of the affected establishment, proper disposal of the birds, and complete disinfection of the premises, in accordance with Resolution N°466/2025.

The Role of Wild Birds

Wild birds play a significant role in the natural dynamics of avian influenza viruses, often acting as reservoirs without showing visible symptoms. Their migratory patterns can transport the virus across ecosystems and geographic regions. Minimizing contact between wild birds and domestic poultry is crucial.

Preventive measures in poultry establishments include checking protective nets and minimizing sources of water or food that attract wild birds. Maintaining cleanliness and removing wild bird feces are also essential to reduce the risk of contagion.

Preventive Measures for Producers and Keepers

Health authorities recommend strengthening biosecurity practices in all poultry establishments. This includes disinfecting vehicles, tools, and inputs entering the sites, and regularly checking installations for breaches in physical barriers preventing wild bird entry.

For those raising backyard birds, keeping them in protected spaces and avoiding contact with wild animals is advised. Using exclusive clothing for coop management and regularly cleaning facilities are also important. Immediate reporting of unusual mortality or symptoms (respiratory, digestive, or neurological) in birds to health authorities is critical for early detection and containment.

Previous Cases in Buenos Aires

This is not the first instance of avian influenza in Buenos Aires province. A previous case was detected in the Laguna La Salada Grande Reserve according to Infobae.

Effective health surveillance and cooperation between producers, technicians, and public organizations are fundamental to protecting animal health and ecosystem balance.