Serveur d'exploration sur la grippe en Allemagne

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[Molecular analyses of human influenza viruses. Circulation of new variants since 1995/96].

Identifieur interne : 000432 ( Main/Exploration ); précédent : 000431; suivant : 000433

[Molecular analyses of human influenza viruses. Circulation of new variants since 1995/96].

Auteurs : B. Biere [Allemagne] ; B. Schweiger

Source :

RBID : pubmed:18773168

Descripteurs français

English descriptors

Abstract

The evolution of influenza viruses is increasingly pursued by molecular analyses that complement classical methods. The analyses focus on the two surface proteins hemagglutinin (HA) and neuraminidase (NA) which determine the viral antigenic profile. Influenza A(H3N2) viruses are exceptionally variable, so that usually at least two virus variants cocirculate at the same time. Together with influenza B viruses they caused approximately 90% of influenza virus infections in Germany during the last 12 seasons, while influenza A(H1N1) viruses only played a subordinate part. Unexpectedly, reassorted viruses of subtype A(H1N2) appeared during the seasons 2001/02 and 2002/03, but were isolated only rarely and gained no epidemiological significance. Furthermore, during the season 2001/02 influenza B viruses of the Victoria-lineage reappeared in Germany and other countries of the northern hemisphere after 10 years of absence. These viruses reassorted with the cocirculating Yamagata-like influenza B viruses, as could be seen by the appearance of viruses with a Victoria-like HA and a Yamagata-like NA.

DOI: 10.1007/s00103-008-0634-2
PubMed: 18773168


Affiliations:


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Le document en format XML

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<title xml:lang="en">[Molecular analyses of human influenza viruses. Circulation of new variants since 1995/96].</title>
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<nlm:affiliation>Robert Koch-Institut, Berlin, BRD.</nlm:affiliation>
<country xml:lang="fr">Allemagne</country>
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<term>Germany (MeSH)</term>
<term>Hemagglutinins, Viral (genetics)</term>
<term>Hemagglutinins, Viral (immunology)</term>
<term>Humans (MeSH)</term>
<term>Influenza A virus (genetics)</term>
<term>Influenza A virus (immunology)</term>
<term>Influenza B virus (genetics)</term>
<term>Influenza B virus (immunology)</term>
<term>Influenza Vaccines (immunology)</term>
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<term>Neuraminidase (genetics)</term>
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<term>Allemagne (MeSH)</term>
<term>Grippe humaine (immunologie)</term>
<term>Grippe humaine (prévention et contrôle)</term>
<term>Grippe humaine (virologie)</term>
<term>Gènes viraux (génétique)</term>
<term>Humains (MeSH)</term>
<term>Hémagglutinines virales (génétique)</term>
<term>Hémagglutinines virales (immunologie)</term>
<term>Phylogenèse (MeSH)</term>
<term>Sialidase (génétique)</term>
<term>Sialidase (immunologie)</term>
<term>Vaccins antigrippaux (immunologie)</term>
<term>Virus de la grippe A (génétique)</term>
<term>Virus de la grippe A (immunologie)</term>
<term>Virus influenza B (génétique)</term>
<term>Virus influenza B (immunologie)</term>
<term>Virus recombinants (génétique)</term>
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<term>Épitopes (génétique)</term>
<term>Épitopes (immunologie)</term>
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<term>Neuraminidase</term>
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<term>Hémagglutinines virales</term>
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<term>Virus de la grippe A</term>
<term>Virus influenza B</term>
<term>Virus recombinants</term>
<term>Épitopes</term>
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<term>Grippe humaine</term>
<term>Hémagglutinines virales</term>
<term>Sialidase</term>
<term>Vaccins antigrippaux</term>
<term>Virus de la grippe A</term>
<term>Virus influenza B</term>
<term>Virus recombinants</term>
<term>Épitopes</term>
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<term>Influenza A virus</term>
<term>Influenza B virus</term>
<term>Influenza, Human</term>
<term>Reassortant Viruses</term>
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<term>Phylogenèse</term>
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<div type="abstract" xml:lang="en">The evolution of influenza viruses is increasingly pursued by molecular analyses that complement classical methods. The analyses focus on the two surface proteins hemagglutinin (HA) and neuraminidase (NA) which determine the viral antigenic profile. Influenza A(H3N2) viruses are exceptionally variable, so that usually at least two virus variants cocirculate at the same time. Together with influenza B viruses they caused approximately 90% of influenza virus infections in Germany during the last 12 seasons, while influenza A(H1N1) viruses only played a subordinate part. Unexpectedly, reassorted viruses of subtype A(H1N2) appeared during the seasons 2001/02 and 2002/03, but were isolated only rarely and gained no epidemiological significance. Furthermore, during the season 2001/02 influenza B viruses of the Victoria-lineage reappeared in Germany and other countries of the northern hemisphere after 10 years of absence. These viruses reassorted with the cocirculating Yamagata-like influenza B viruses, as could be seen by the appearance of viruses with a Victoria-like HA and a Yamagata-like NA.</div>
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