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Zoonotic transmission of novel Influenza A variant viruses detected in Brazil during 2020 to 2023

病毒学 传输(电信) 严重急性呼吸综合征冠状病毒2型(SARS-CoV-2) 甲型流感病毒 2019年冠状病毒病(COVID-19) H5N1亚型流感病毒 生物 环境卫生 医学 病毒 计算机科学 疾病 传染病(医学专业) 电信 病理
作者
Paola Cristina Resende,Dennis Maletich Junqueira,Caroline Tochetto,Maria Ogrzewalska,Fernando Couto Motta,Jonathan Christian Oliveira Lopes,Luciana Appolinario,Larissa Macedo,Bráulia Costa Caetano,Aline da Rocha Matos,Thauane Silva,Elisa Cavalcante Pereira,Livia Lima,Irina Nastassja Riediger,Maria do Carmo Debur,Guilherme Becker,Aline Andrade,Acácia Maria Lourenço Francisco Nasr,Rosana Aparecida Piler,Ana Carolina Dalla Vecchia,Walquíria Aparecida Ferreira de Almeida,David W. Brown,Rejane Schaefer,Marilda Mendonça Siqueira
出处
期刊:Nature Communications [Nature Portfolio]
卷期号:15 (1)
标识
DOI:10.1038/s41467-024-53815-z
摘要

Zoonotic infections (swine-human) caused by influenza A viruses (IAVs) have been reported and linked to close contact between these species. Here, we describe eight human IAV variant infections (6 mild and 2 severe cases, including 1 death) detected in Paraná, Brazil, during 2020–2023. Genomes recovered were closely related to Brazilian swIAVs of three major lineages (1 A.3.3.2/pdm09, 1B/human-like, and H3.1990.5), including three H1N1v, two H1N2v, two H3N2v and one H1v. Five H1v were closely related to pdm09 lineage, one H1v (H1N2v) grouped within 1B.2.3 clade, and the two H3v grouped within a clade composed exclusively of Brazilian H3 swIAV (clade H3.1990.5.1). Internal gene segments were closely related to H1N1pdm09 isolated from pigs. IAV variant rarely result in sustained transmission between people, however the potential to develop such ability is of concern and must not be underestimated. This study brings into focus the need for continuous influenza surveillance and timely risk assessment. Human infections with swine-origin influenza A viruses occur sporadically. Here, the authors describe the genomic and epidemiological characteristics of eight cases detected in southern Brazil between 2020 and 2023 and find close links to isolates from pigs, suggesting limited human-to-human transmission.
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