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Emerg Infect Dis . Incursion of Highly Pathogenic Avian Influenza A(H5N1) Clade 2.3.4.4b Virus, Brazil, 2023

tetano

tetano

Editor, Senior Moderator
Emerg Infect Dis


. 2024 Jan 30;30(3).
doi: 10.3201/eid3003.231157. Online ahead of print.
Incursion of Highly Pathogenic Avian Influenza A(H5N1) Clade 2.3.4.4b Virus, Brazil, 2023

Andreina Carvalho de Araújo, Laura Morais Nascimento Silva, Andrew Yong Cho, Márcio Repenning, Deyvid Amgarten, Ana Paula de Moraes, Fernanda Malta, Michael Miller, Erick G Dorlass, Soledad Palameta, Daniele Bruna L Oliveira, Jansen de Araújo, Clarice Weis Arns, Edison L Durigon, João Renato R Pinho, Dong-Hun Lee, Helena Lage Ferreira
Abstract

We report 4 highly pathogenic avian influenza A(H5N1) clade 2.3.4.4.b viruses in samples collected during June 2023 from Royal terns and Cabot's terns in Brazil. Phylodynamic analysis revealed viral movement from Peru to Brazil, indicating a concerning spread of this clade along the Atlantic Americas migratory bird flyway.

Keywords: Brazil; H5N1; highly pathogenic avian influenza virus; influenza; phylodynamic analysis; phylogenetic analysis; respiratory infections; viruses; wild bird; zoonoses.

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