Genetic Characterization of Highly Pathogenic Avian Influenza A(H5N1) Clade 2.3.4.4b, Antarctica, 2024

Victor Neira; Naomi Ariyama; Pablo N. Castillo-Torres; Barbara Brito; Gabriela Muñoz; Karla B. Díaz Morales; Leonardo I. Almonacid; Benjamín Bennett-Laso; Barbara Berazay; Miloš Barták; Rafael Medina; Marcelo González-Aravena; Catalina Pardo-Roa

doi:10.3201/eid3108.250186

Genetic Characterization of Highly Pathogenic Avian Influenza A(H5N1) Clade 2.3.4.4b, Antarctica, 2024

Victor Neira
, Naomi Ariyama
, Pablo N. Castillo-Torres
, Barbara Brito
, Gabriela Muñoz
, Karla B. Díaz Morales
, Leonardo I. Almonacid
, Benjamín Bennett-Laso
, Barbara Berazay
, Miloš Barták
, Rafael Medina
, Marcelo González-Aravena
, Catalina Pardo-Roa

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

In 2024, we sequenced highly pathogenic avian influenza virus A(H5N1) clade 2.3.4.4b genomes isolated from 5 brown skuas from James Ross Island, Antarctica. Phylogenetic analysis suggested the virus reached Antarctica through South America. Continued genetic surveillance will be critical to elucidate H5N1 virus transmission dynamics within Antarctica and surrounding areas.

Original language	English
Pages (from-to)	1618-1620
Number of pages	3
Journal	Emerging Infectious Diseases
Volume	31
Issue number	8
DOIs	https://doi.org/10.3201/eid3108.250186
State	Published - Aug 2025
Externally published	Yes

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Neira, V., Ariyama, N., Castillo-Torres, P. N., Brito, B., Muñoz, G., Díaz Morales, K. B., Almonacid, L. I., Bennett-Laso, B., Berazay, B., Barták, M., Medina, R., González-Aravena, M., & Pardo-Roa, C. (2025). Genetic Characterization of Highly Pathogenic Avian Influenza A(H5N1) Clade 2.3.4.4b, Antarctica, 2024. Emerging Infectious Diseases, 31(8), 1618-1620. https://doi.org/10.3201/eid3108.250186

@article{dd3095fe87b943649bee1b9e0a3b2b48,

title = "Genetic Characterization of Highly Pathogenic Avian Influenza A(H5N1) Clade 2.3.4.4b, Antarctica, 2024",

abstract = "In 2024, we sequenced highly pathogenic avian influenza virus A(H5N1) clade 2.3.4.4b genomes isolated from 5 brown skuas from James Ross Island, Antarctica. Phylogenetic analysis suggested the virus reached Antarctica through South America. Continued genetic surveillance will be critical to elucidate H5N1 virus transmission dynamics within Antarctica and surrounding areas.",

author = "Victor Neira and Naomi Ariyama and Castillo-Torres, \{Pablo N.\} and Barbara Brito and Gabriela Mu{\~n}oz and \{D{\'i}az Morales\}, \{Karla B.\} and Almonacid, \{Leonardo I.\} and Benjam{\'i}n Bennett-Laso and Barbara Berazay and Milo{\v s} Bart{\'a}k and Rafael Medina and Marcelo Gonz{\'a}lez-Aravena and Catalina Pardo-Roa",

year = "2025",

month = aug,

doi = "10.3201/eid3108.250186",

language = "English",

volume = "31",

pages = "1618--1620",

journal = "Emerging Infectious Diseases",

issn = "1080-6040",

publisher = "Centers for Disease Control and Prevention (CDC)",

number = "8",

}

Neira, V, Ariyama, N, Castillo-Torres, PN, Brito, B, Muñoz, G, Díaz Morales, KB, Almonacid, LI, Bennett-Laso, B, Berazay, B, Barták, M, Medina, R, González-Aravena, M & Pardo-Roa, C 2025, 'Genetic Characterization of Highly Pathogenic Avian Influenza A(H5N1) Clade 2.3.4.4b, Antarctica, 2024', Emerging Infectious Diseases, vol. 31, no. 8, pp. 1618-1620. https://doi.org/10.3201/eid3108.250186

TY - JOUR

T1 - Genetic Characterization of Highly Pathogenic Avian Influenza A(H5N1) Clade 2.3.4.4b, Antarctica, 2024

AU - Neira, Victor

AU - Ariyama, Naomi

AU - Castillo-Torres, Pablo N.

AU - Brito, Barbara

AU - Muñoz, Gabriela

AU - Díaz Morales, Karla B.

AU - Almonacid, Leonardo I.

AU - Bennett-Laso, Benjamín

AU - Berazay, Barbara

AU - Barták, Miloš

AU - Medina, Rafael

AU - González-Aravena, Marcelo

AU - Pardo-Roa, Catalina

PY - 2025/8

Y1 - 2025/8

N2 - In 2024, we sequenced highly pathogenic avian influenza virus A(H5N1) clade 2.3.4.4b genomes isolated from 5 brown skuas from James Ross Island, Antarctica. Phylogenetic analysis suggested the virus reached Antarctica through South America. Continued genetic surveillance will be critical to elucidate H5N1 virus transmission dynamics within Antarctica and surrounding areas.

AB - In 2024, we sequenced highly pathogenic avian influenza virus A(H5N1) clade 2.3.4.4b genomes isolated from 5 brown skuas from James Ross Island, Antarctica. Phylogenetic analysis suggested the virus reached Antarctica through South America. Continued genetic surveillance will be critical to elucidate H5N1 virus transmission dynamics within Antarctica and surrounding areas.

UR - https://www.scopus.com/pages/publications/105012420244

U2 - 10.3201/eid3108.250186

DO - 10.3201/eid3108.250186

M3 - Article

C2 - 40633557

AN - SCOPUS:105012420244

SN - 1080-6040

VL - 31

SP - 1618

EP - 1620

JO - Emerging Infectious Diseases

JF - Emerging Infectious Diseases

IS - 8

ER -

Genetic Characterization of Highly Pathogenic Avian Influenza A(H5N1) Clade 2.3.4.4b, Antarctica, 2024

Abstract

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