Abstract

Clade 2.3.4.4b highly pathogenic avian influenza (HPAI) H5N1 virus was detected in the South American sea lions found dead in Santa Catarina, Brazil, in October 2023. Whole genome sequencing and comparative phylogenetic analysis were conducted to investigate the origin, genetic diversity, and zoonotic potentials of the H5N1 viruses. The H5N1 viruses belonged to the genotype B3.2 of clade 2.3.4.4b H5N1 virus, which was identified in North America and disseminated to South America. They have acquired new amino acid substitutions related to mammalian host affinity. Our study provides insights into the genetic landscape of HPAI H5N1 viruses in Brazil, highlighting the continuous evolutionary processes contributing to their possible adaptation to mammalian hosts.

Details

Title
Mortality in sea lions is associated with the introduction of the H5N1 clade 2.3.4.4b virus in Brazil October 2023: whole genome sequencing and phylogenetic analysis
Author
Andreina de Carvalho Araujo; Andrew Yong Cho; Laura Morais Nascimento Silva; Thais Camilo Corrêa; Gabriela Cristini de Souza; Adriana Silva Albuquerque; Macagnan, Eduardo; Kolesnikvoas, Cristiane K M; Meurer, Rafael; Jenyffer Vierheller Vieira; Lemos, Giulia Gaglianone; André Silva Barreto; Dick, Jeferson Luis; Groch, Karina Rejane; Pedro Volkmer de Castilho; Amgarten, Deyvid
Pages
1-8
Section
Research
Publication year
2024
Publication date
2024
Publisher
BioMed Central
e-ISSN
17466148
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3079227672
Copyright
© 2024. This work is licensed under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.