Highly Pathogenic Avian Influenza Virus Subtype 5 in Cetaceans, Brazil

Alanis S. Melgarejo; Maurício Tavares; Derek B. de Amorim; Sérgio C. Estima; Andrine Paiva; Caio R. Soares-Oliveira; Liane Amaral Dias; Renan C. de Lima; Silvina Botta; Eduardo R. Secchi; Barbara A. Davila; Larissa S. Heinzelmann; Martha T. Oliveira; Vitor L. Carvalho; Aline R. Souza; Salvatore Siciliano; Paula Baldassin; Greicy F. Ruenes; Paulo Henrique Ott; Luciana Sonne; Ana C. Franco; Larissa R. Oliveira

doi:10.3201/eid3210.260051

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Highly Pathogenic Avian Influenza Virus Subtype 5 in Cetaceans, Brazil

Alanis S. Melgarejo, Maurício Tavares, Derek B. de Amorim, Sérgio C. Estima, Andrine Paiva, Caio R. Soares-Oliveira, Liane Amaral Dias, Renan C. de Lima, Silvina Botta, Eduardo R. Secchi, Barbara A. Davila, Larissa S. Heinzelmann, Martha T. Oliveira, Vitor L. Carvalho, Aline R. Souza, Salvatore Siciliano, Paula Baldassin, Greicy F. Ruenes, Paulo Henrique Ott, Luciana Sonne, Ana C. Franco, Larissa R. Oliveira

Emerging Infectious Diseases2026doi:10.3201/eid3210.260051

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Abstract

We identified highly pathogenic avian influenza virus subtype H5 in stranded dolphins along the coastline of Brazil during 2023-2025. Infected animals included species classified as vulnerable or endangered. Our results highlight the need for ongoing surveillance of cetaceans susceptible to viral infections, which pose an additional threat to threatened species.

Highly Pathogenic Avian Influenza Virus Subtype 5 in Cetaceans, Brazil

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