OmniVira

Highly Pathogenic Avian Influenza A(H5N1) Viruses from Multispecies Outbreak, Argentina, August 2023.

Agustina Rimondi Ralph E T Vanstreels Valeria Olivera Agustina Donini Martina Miqueo Lauriente Marcela M Uhart
PMID38413243 DOI10.3201/eid3004.231725 Year2024 Journal Emerging infectious diseases Emerg Infect Dis Languageeng Publication statusActive
Active Last checked 2026-10-02 03:30:39 Source: NCBI PubMed

Abstract

We report full-genome characterization of highly pathogenic avian influenza A(H5N1) clade 2.3.4.4b virus from an outbreak among sea lions (August 2023) in Argentina and possible spillover to fur seals and terns. Mammalian adaptation mutations in virus isolated from marine mammals and a human in Chile were detected in mammalian and avian hosts.

Supporting text Virus Host Location
Argentina 6 highly pathogenic avian influenza virus H5N1 1 HPAI H5N1 6 influenza 63 mammalian adaptation 6 mammals 100 pinnipeds 4 seabirds 4 South America 8 transmission 56 viruses 120 Influenza A virus 191 Influenza A Virus, H5N1 Subtype 308 Influenza in Birds 352 Animals 1981 Argentina 6 Birds 215 Disease Outbreaks 174 Humans 1455 Mammals 92 Phylogeny 826

Evidence records

1 total
Transmission Evidence
1 records · 1 evidence types
Evidence type Outbreak Investigation
1 records
OVE7826 Outbreak Investigation
Key finding

An outbreak of highly pathogenic avian influenza A(H5N1) clade 2.3.4.4b occurred among sea lions in Argentina in August 2023.

Virus
Influenza A virus H5N1
Host
fur seals & sea lions Otariidae Natural host
Location
Argentina
Supporting text

We report full-genome characterization of highly pathogenic avian influenza A(H5N1) clade 2.3.4.4b virus from an outbreak among sea lions (August 2023) in Argentina.

Method
full-genome characterization
Transmission direction
same-species transmission
Geographic raw
Argentina
Country inferred
ARG
Outbreak time
August 2023