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Title: Reverse-zoonoses of 2009 H1N1 pandemic influenza A viruses and evolution in United States swine results in viruses with zoonotic potential

Journal Article · · PLoS Pathogens

The 2009 H1N1 pandemic (pdm09) lineage of influenza A virus (IAV) crosses interspecies barriers with frequent human-to-swine spillovers each year. These spillovers reassort and drift within swine populations, leading to genetically and antigenically novel IAV that represent a zoonotic threat. We quantified interspecies transmission of the pdm09 lineage, persistence in swine, and identified how evolution in swine impacted zoonotic risk. Human and swine pdm09 case counts between 2010 and 2020 were correlated and human pdm09 burden and circulation directly impacted the detection of pdm09 in pigs. However, there was a relative absence of pdm09 circulation in humans during the 2020–21 season that was not reflected in swine. During the 2020–21 season, most swine pdm09 detections originated from human-to-swine spillovers from the 2018–19 and 2019–20 seasons that persisted in swine. We identified contemporary swine pdm09 representatives of each persistent spillover and quantified cross-reactivity between human seasonal H1 vaccine strains and the swine strains using a panel of monovalent ferret antisera in hemagglutination inhibition (HI) assays. The swine pdm09s had variable antigenic reactivity to vaccine antisera, but each swine pdm09 clade exhibited significant reduction in cross-reactivity to one or more of the human seasonal vaccine strains. Further supporting zoonotic risk, we showed phylogenetic evidence for 17 swine-to-human transmission events of pdm09 from 2010 to 2021, 11 of which were not previously classified as variants, with each of the zoonotic cases associated with persistent circulation of pdm09 in pigs. These data demonstrate that reverse-zoonoses and evolution of pdm09 in swine results in viruses that are capable of zoonotic transmission and represent a potential pandemic threat.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-06OR23100
OSTI ID:
1992703
Journal Information:
PLoS Pathogens, Journal Name: PLoS Pathogens Vol. 19 Journal Issue: 7; ISSN 1553-7374
Publisher:
Public Library of Science (PLoS)Copyright Statement
Country of Publication:
United States
Language:
English

References (47)

The use of plant lectins to regulate H1N1 influenza A virus receptor binding activity journal April 2018
Reassortment between Swine H3N2 and 2009 Pandemic H1N1 in the United States Resulted in Influenza A Viruses with Diverse Genetic Constellations with Variable Virulence in Pigs journal February 2017
Antigenic Distance between North American Swine and Human Seasonal H3N2 Influenza A Viruses as an Indication of Zoonotic Risk to Humans journal January 2022
Estimating Influenza Disease Burden from Population-Based Surveillance Data in the United States journal March 2015
The genesis and source of the H7N9 influenza viruses causing human infections in China journal August 2013
Co-circulation of multiple influenza A reassortants in swine harboring genes from seasonal human and swine influenza viruses journal July 2021
The emergence and evolution of influenza A (H1α) viruses in swine in Canada and the United States journal November 2017
ISU FLUture: a veterinary diagnostic laboratory web-based platform to monitor the temporal genetic patterns of Influenza A virus in swine journal November 2018
Influenza Pandemic Periodicity, Virus Recycling, and the Art of Risk Assessment journal January 2006
ModelFinder: fast model selection for accurate phylogenetic estimates journal May 2017
Population dynamics of cocirculating swine influenza A viruses in the United States from 2009 to 2012 journal November 2013
Spatial Dynamics of Human-Origin H1 Influenza A Virus in North American Swine journal June 2011
Influenza Research Database: An integrated bioinformatics resource for influenza virus research journal September 2016
The rapid generation of mutation data matrices from protein sequences journal January 1992
Origins and evolutionary genomics of the 2009 swine-origin H1N1 influenza A epidemic journal June 2009
Antigenic and Genetic Characteristics of Swine-Origin 2009 A(H1N1) Influenza Viruses Circulating in Humans journal May 2009
Molecular Epidemiology and Evolution of Influenza Viruses Circulating within European Swine between 2009 and 2013 journal July 2015
The genomic evolution of H1 influenza A viruses from swine detected in the United States between 2009 and 2016 journal August 2017
Spatial and temporal coevolution of N2 neuraminidase and H1 and H3 hemagglutinin genes of influenza A virus in US swine journal October 2021
The Structure and Receptor Binding Properties of the 1918 Influenza Hemagglutinin journal March 2004
A space-time process model for the evolution of DNA sequences. journal February 1995
Surveillance of European Domestic Pig Populations Identifies an Emerging Reservoir of Potentially Zoonotic Swine Influenza A Viruses journal October 2020
The effect of the COVID-19 pandemic on influenza-related hospitalization, intensive care admission and mortality in children in Canada: A population-based study journal March 2022
BLAST+: architecture and applications journal January 2009
Prevalent Eurasian avian-like H1N1 swine influenza virus with 2009 pandemic viral genes facilitating human infection journal June 2020
Basic local alignment search tool journal October 1990
Influenza A(H3N2) Virus in Swine at Agricultural Fairs and Transmission to Humans, Michigan and Ohio, USA, 2016 journal September 2017
Origins of the 2009 H1N1 influenza pandemic in swine in Mexico journal June 2016
octoFLU: Automated Classification for the Evolutionary Origin of Influenza A Virus Gene Sequences Detected in U.S. Swine journal August 2019
Antigenic Characterization and Pandemic Risk Assessment of North American H1 Influenza A Viruses Circulating in Swine journal December 2022
The antigenic structure of the influenza virus A/PR/8/34 hemagglutinin (H1 subtype) journal December 1982
Detection of live attenuated influenza vaccine virus and evidence of reassortment in the U.S. swine population journal February 2020
Impact of COVID-19 outbreaks and interventions on influenza in China and the United States journal May 2021
Genetic Variability among Swine Influenza Viruses in Italy: Data Analysis of the Period 2017–2020 journal December 2021
European Surveillance Network for Influenza in Pigs: Surveillance Programs, Diagnostic Tools and Swine Influenza Virus Subtypes Identified in 14 European Countries from 2010 to 2013 journal December 2014
Global transmission of influenza viruses from humans to swine journal October 2012
The role of species traits in the establishment success of exotic birds journal December 2009
A highly pathogenic avian-derived influenza virus H5N1 with 2009 pandemic H1N1 internal genes demonstrates increased replication and transmission in pigs journal January 2017
MAFFT Multiple Sequence Alignment Software Version 7: Improvements in Performance and Usability journal January 2013
Changes in Influenza and Other Respiratory Virus Activity During the COVID-19 Pandemic — United States, 2020–2021 journal July 2021
IQ-TREE: A Fast and Effective Stochastic Algorithm for Estimating Maximum-Likelihood Phylogenies journal November 2014
Swine Influenza A Viruses and the Tangled Relationship with Humans journal January 2020
Continual Reintroduction of Human Pandemic H1N1 Influenza A Viruses into Swine in the United States, 2009 to 2014 journal April 2015
Genetic and Antigenic Characterization of an Expanding H3 Influenza A Virus Clade in U.S. Swine Visualized by Nextstrain journal June 2022
The epitope regions of H1-subtype influenza A, with application to vaccine efficacy journal July 2009
TreeTime: Maximum-likelihood phylodynamic analysis journal January 2018
octoFLUshow: an Interactive Tool Describing Spatial and Temporal Trends in the Genetic Diversity of Influenza A Virus in U.S. Swine journal December 2021