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Related to Antigenic drift: Original antigenic sin


 (ăn′tĭ-jən) also an·ti·gene (-jēn′)
A molecule that is capable of binding to an antibody or to an antigen receptor on a T cell, especially one that induces an immune response. An antigen is usually a foreign substance, such as a toxin or a component of a virus, bacterium, or parasite.

an′ti·gen′ic (-jĕn′ĭk) adj.
an′ti·gen′i·cal·ly adv.
an′ti·ge·nic′i·ty (-jə-nĭs′ĭ-tē) n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.antigenic - of or relating to antigens
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


a. antigénico-a, que tiene las propiedades de un antígeno;
___ determinantdeterminante ___;
___ driftvariaciones antigénicas menores;
___ shiftvariación ___ mayor;
___ specificityespecificidad ___.
English-Spanish Medical Dictionary © Farlex 2012
References in periodicals archive ?
Because the influenza virus is constantly undergoing a process known as antigenic drift, new variants of the virus may emerge from year to year, and the vaccine which was protective during one influenza season may not be fully protective during the following year.
The molecular determinants of antibody recognition and antigenic drift in the H3 hemagglutinin of swine influenza A virus.
Antigenic testing of available influenza A and B viruses indicated that no significant antigenic drift in circulating viruses had emerged.
(3) The seasonal vaccine must account for this antigenic drift to be effective.
In addition, the tests capability to detect multiple segments of RNA improves strain coverage and prevents loss of sensitivity as natural variations (antigenic drift and shift) of the Influenza virus occur.
Since several different viruses cause seasonal influenza and these viruses are subject to continual antigenic changes ('antigenic drift'), World Health Organization (WHO) every year recommends a new strain-specific vaccine in February for the northern hemisphere and in September for the south to prevent infection.
Van Borm et al., "Further evidence of antigenic drift and protective efficacy afforded by a recombinant HVT-H5 vaccine against challenge with two antigenically divergent Egyptian clade 2.2.1 HPAI H5N1 strains," Vaccine, vol.
Because influenza viruses mutate rapidly (antigenic drift) and dominant strains can vary from year to year, people are advised to be vaccinated yearly with the newest vaccine.
(70) Recently, the documentation of the antigenic drift from the vaccine strain in a majority of considered isolates raised concern that vaccine effectiveness might be suboptimal, especially in older ages or specific high-risk groups.
The two new mechanisms of change in influenza strains are antigenic drift and antigenic shift.
This may be due to less degree of antigenic drift in the influenza virus." " This type of weather is never expected in the month of December.