Tracking the emergence of antigenic variants in influenza A virus epidemics in Brazil

Simple item page
dc.contributor.authorPillai, Tara K.
dc.contributor.authorJohnson, Katherine E.
dc.contributor.authorSong, Timothy
dc.contributor.authorGregianini, Tatiana S.
dc.contributor.authorTatiana, G. Baccin
dc.contributor.authorWang, Guojun
dc.contributor.authorMedina, Rafael A.
dc.contributor.authorVan Bakel, Harm
dc.contributor.authorGarcia-Sastre, Adolfo
dc.contributor.authorNelson, Martha, I
dc.contributor.authorGhedin, Elodie
dc.contributor.authorVeiga, Ana B. G.
dc.date.accessioned2025-01-20T20:11:23Z
dc.date.available2025-01-20T20:11:23Z
dc.date.issued2023
dc.description.abstractInfluenza A virus (IAV) circulation patterns differ in North America and South America, with influenza seasons often characterized by different subtypes and strains. However, South America is relatively undersampled considering the size of its population. To address this gap, we sequenced the complete genomes of 220 IAVs collected between 2009 and 2016 from hospitalized patients in southern Brazil. New genetic drift variants were introduced into southern Brazil each season from a global gene pool, including four H3N2 clades (3c, 3c2, 3c3, and 3c2a) and five H1N1pdm clades (clades 6, 7, 6b, 6c, and 6b1). In 2016, H1N1pdm viruses belonging to a new 6b1 clade caused a severe influenza epidemic in southern Brazil that arrived early and spread rapidly, peaking mid-autumn. Inhibition assays showed that the A/California/07/2009(H1N1) vaccine strain did not protect well against 6b1 viruses. Phylogenetically, most 6b1 sequences that circulated in southern Brazil belong to a single transmission cluster that rapidly diffused across susceptible populations, leading to the highest levels of influenza hospitalization and mortality seen since the 2009 pandemic. Continuous genomic surveillance is needed to monitor rapidly evolving IAVs for vaccine strain selection and understand their epidemiological impact in understudied regions.
dc.fuente.origenWOS
dc.identifier.doi10.1093/ve/vead027
dc.identifier.eissn2057-1577
dc.identifier.urihttps://doi.org/10.1093/ve/vead027
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92141
dc.identifier.wosidWOS:000989539700001
dc.issue.numero1
dc.language.isoen
dc.revistaVirus evolution
dc.rightsacceso restringido
dc.subjectinfluenza A virus
dc.subjectgenomic surveillance
dc.subjectsevere acute respiratory infection
dc.subjectvirus evolution
dc.subjectphylodynamics
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titleTracking the emergence of antigenic variants in influenza A virus epidemics in Brazil
dc.typeartículo
dc.volumen9
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas