Publication
Novel Highly Pathogenic Avian Influenza A(H5N1) Virus, Argentina, 2025 (opens in a new tab)
Vanstreels RET, Nelson MI, Artuso MC, Marchione VD, Piccini LE, Benedetti E, Crespo-Bellido A, Pierdomenico A, Wolff T, Uhart MM, Rimondi A
Emerg Infect Dis 2025 31(12):2279-2283
DOI 10.3201/eid3112.250783 (opens in a new tab) PubMed ID 41385779 (opens in a new tab) PubMed Central PMC12782262 (opens in a new tab) Download PDF (opens in a new tab)
Abstract
Genomic sequencing of reemerging highly pathogenic avian influenza A(H5N1) virus detected in Argentina in February 2025 revealed novel triple-reassortant viruses containing gene segments from Eurasian H5N1 and low pathogenicity viruses from South and North American lineages. Our findings highlight continued evolution and diversification of clade 2.3.4.4b H5N1 in the Americas.