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CASSURE ANTIGENIQUE [1 record]

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Alphabetical list of terms

Record 1 2005-11-10

English

Subject field(s)
  • Microbiology and Parasitology
  • Genetics
  • Viral Diseases
DEF

A sudden, major change in the antigenicity of a virus, seen especially in influenza viruses, resulting from the recombination of the genomes of two virus strains.

OBS

The antigenic shift is associated with pandemics because hosts do not have immunity to the new strain.

French

Domaine(s)
  • Microbiologie et parasitologie
  • Génétique
  • Maladies virales
DEF

Variation antigénique brutale majeure des protéines antigéniques de surface (hémagglutinine et quelquefois neuraminidase) du virus grippal A, qui donne naissance à un nouveau virus.

OBS

La cassure résulte d'échanges entre souches animales et humaines qui sont rares. Elle est à l'origine des pandémies [...].

OBS

La cassure antigénique donne naissance à un nouveau virus très différent de ce qui existait déjà [...]. Ce virus hybride contre lequel l'immunité pré-existante et le vaccin préparé avec les souches précédentes ne protègent pas, va gagner le territoire. C'est la pandémie.

Spanish

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