Pandemic (H1N1) 2009 Virus Revisited: an Evolutionary Retrospective
Identifieur interne : 000C26 ( Main/Exploration ); précédent : 000C25; suivant : 000C27Pandemic (H1N1) 2009 Virus Revisited: an Evolutionary Retrospective
Auteurs : Mc Christman [États-Unis] ; A. Kedwaii [États-Unis] ; J. Xu [États-Unis] ; Ro Donis [États-Unis] ; G. Lu [États-Unis]Source :
- Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases [ 1567-1348 ] ; 2011.
Abstract
The pandemic (H1N1) 2009 virus is unique in many aspects, especially in its genetics and evolution. In this paper, we examine the molecular mechanisms underlying the evolution of this novel virus through a comprehensive bioinformatics analysis, and present results in the context of a review of the literature. The pandemic virus was found to arise from a reassortment of two swine viruses, each of which ultimately arose from interspecies transmission. It experienced fast evolutionary rates and strong selection pressures, diverging into two different clusters at the early pandemic stage. Cluster I became extinct at the end of 2009 whereas cluster II continued to circulate at much lower rates in 2010. Therefore, on August 10 of 2010 the WHO declared the end of the pandemic. Important mutations associated with host specificity, virulence, and drug resistance were detected in the pandemic virus, indicating effective transmission and increased severity in humans. Much has been learned about the evolutionary dynamics of this pandemic virus; however, it is still impossible to predict when the next pandemic will occur and which virus will be responsible. Improved surveillance at different levels (both national and international) and in different hosts (especially in swine) appears to be crucial for early detection and prevention of future influenza pandemics.
Url:
DOI: 10.1016/j.meegid.2011.02.021
PubMed: 21382522
PubMed Central: 3141221
Affiliations:
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Lu</name><affiliation wicri:level="2"><nlm:aff id="A1">Department of Biology, University of Nebraska at Omaha, Omaha, NE 68182, USA</nlm:aff><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Biology, University of Nebraska at Omaha, Omaha, NE 68182</wicri:regionArea><placeName><region type="state">Nebraska</region></placeName></affiliation></author></analytic><series><title level="j">Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases</title><idno type="ISSN">1567-1348</idno><idno type="eISSN">1567-7257</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p id="P1">The pandemic (H1N1) 2009 virus is unique in many aspects, especially in its genetics and evolution. In this paper, we examine the molecular mechanisms underlying the evolution of this novel virus through a comprehensive bioinformatics analysis, and present results in the context of a review of the literature. The pandemic virus was found to arise from a reassortment of two swine viruses, each of which ultimately arose from interspecies transmission. It experienced fast evolutionary rates and strong selection pressures, diverging into two different clusters at the early pandemic stage. Cluster I became extinct at the end of 2009 whereas cluster II continued to circulate at much lower rates in 2010. Therefore, on August 10 of 2010 the WHO declared the end of the pandemic. Important mutations associated with host specificity, virulence, and drug resistance were detected in the pandemic virus, indicating effective transmission and increased severity in humans. Much has been learned about the evolutionary dynamics of this pandemic virus; however, it is still impossible to predict when the next pandemic will occur and which virus will be responsible. Improved surveillance at different levels (both national and international) and in different hosts (especially in swine) appears to be crucial for early detection and prevention of future influenza pandemics.</p></div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Géorgie (États-Unis)</li><li>Nebraska</li></region></list><tree><country name="États-Unis"><region name="Nebraska"><name sortKey="Christman, Mc" sort="Christman, Mc" uniqKey="Christman M" first="Mc" last="Christman">Mc Christman</name></region><name sortKey="Donis, Ro" sort="Donis, Ro" uniqKey="Donis R" first="Ro" last="Donis">Ro Donis</name><name sortKey="Kedwaii, A" sort="Kedwaii, A" uniqKey="Kedwaii A" first="A" last="Kedwaii">A. 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