| antigenic s. |
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; it is associated with pandemics because hosts do not have immunity to the new strain. Cf. antigenic drift, under drift.
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| antigenic v. |
1. a mechanism whereby parasites, such as trypanosomes, plasmodia, and Borrelia, are enabled to escape immune surveillance of a host by modifying or completely altering their surface antigens. 2. a phenomenon occurring in the influenza virus, in which the virus spontaneously exhibits both slow antigenic drift and sharp antigenic changes at intervals.
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| antigenicity |
the property of being able to induce a specific immune response or the degree to which a substance is able to stimulate an immune response. Called also immunogenicity.
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| antigen binding site |
Antigenic determinant.
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| antigen receptor |
Receptors, primarily on white blood cells, that bind with the epitope on foreign antigens, stimulating an immune response. SEE: epitope.
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