# Avian influenza outbreaks in South America > Live situation record from CLSTR: https://clstr.news/situations/avian-influenza-outbreaks-in-south-america > Updated: 2026-10-08T13:29:43.000Z. Sources: 10. Developments: 2. Highly pathogenic avian influenza (H5) has been detected in domestic poultry across different regions of South America. In September 2026, Argentina’s National Service for Agri-Food Health and Quality (Senasa) confirmed cases in backyard poultry, specifically ducks and chickens, in Carlos Spegazzini, Buenos Aires province. In response, authorities established a 3-kilometer prevention zone and implemented biocontainment measures. Officials noted that the finding did not alter Argentina’s status as a country free of highly pathogenic avian influenza and clarified that the virus is not transmitted through poultry products. By October 2026, authorities in Rio Grande do Sul, Brazil, reported that an outbreak in the municipality of Selbach had been officially contained. The virus was initially confirmed in domestic birds at a subsistence property in the Alto Jacuí region. Following an intensive sanitary sweep of 70 rural properties within a 10-kilometer perimeter, no new symptoms or suspected cases were identified. Local authorities have maintained heightened surveillance and biosecurity awareness campaigns. ## Timeline ### 2026-10-08: Rio Grande do Sul authorities contain avian influenza outbreak Authorities in Rio Grande do Sul have contained an avian influenza outbreak in Selbach after inspecting 70 properties and finding no new cases in the surrounding area. 5 sources. https://clstr.news/cluster/rio-grande-do-sul-authorities-contain-avian-influenza-outbreak ### 2026-09-16: Argentina confirms H5 avian influenza in Buenos Aires poultry Senasa confirmed a case of highly pathogenic H5 avian influenza in backyard poultry in Carlos Spegazzini, Buenos Aires. A 3km prevention zone has been established to contain the virus. 5 sources. https://clstr.news/cluster/argentina-confirms-h5-avian-influenza-in-buenos-aires-poultry --- Cite as: Avian influenza outbreaks in South America. CLSTR, https://clstr.news/situations/avian-influenza-outbreaks-in-south-america