| 词汇 | antigen |
| 释义 | antigen noun[ C ] biology specializeduk /ˈæn.tɪ.dʒən//ˈæn.tɪ.dʒen/ us /ˈæn.tɪ.dʒən//ˈæn.tɪ.dʒen/ a substance that causes the body's immune system (= the system for fighting infections) to react, especially by producing antibodies (= proteins that attack harmful bacteria, viruses, etc.)抗原 Immunology & vaccination active immunity ANA anti-vax antibody antigenic antinuclear antibody electroporation herd immunity immune response immunity immunization immunocompromised immunosuppressed lymph MMR titre unimmunized uninoculated unvaccinated vaccinated You can also find related words, phrases, and synonyms in the topics: The circulatory system & blood I shall not discuss the antigen or its method of administration. Injections must be made and the antigen must go into the plants, not in single doses, if you please, but by the thousands. antigen | American Dictionaryantigen noun[ C ] us/ˈænt·ɪ·dʒən, -ˌdʒen/ biology a harmful substance that causes the body to produce antibodies (= substances that fight disease) Examples of antigenantigen Immunoblot analysis has revealed striking specificity of antigen components in the 3 sandfly species studied. Liposomes are lipid membrane particles that serve as vehicles or delivery systems for vaccine antigens. Subsequent experiments were performed using standard methods plus antigen recovery because this enhances the quality of the immunolabelling. Determining the paternal antigen status through a peripheral blood assay is an important step, which should be undertaken early in the pregnancy. To some extent, the difference between the types of antigen used makes a fair comparison between results difficult. As tumour growth progresses, parts of the tumour can become necrotic and soluble t u m o u r antigens are released. The major challenge in the development of antischistosome vaccines is to use defined antigens to stimulate an appropriate immune response that leads to resistance. It must be borne in mind always that the efficacy of a vaccine depends on more than the primary amino acid sequence of the antigen. Evidence for cross-species efficacy of homologous antigens will be discussed. The donor's antigens can be typed in several different ways. Conversely, antibody production is controlled by the probability of antibodies (or antibody-producing cells) encountering bacteria (or being presented with antigens derived from these pathogens). If the participation of the former type of antibody were predominant or exclusive, sera would show similar reactivities against all antigens. Furthermore, the preparation of carbohydrate antigen still depends on extraction from crude antigens. However, immunodiagnosis using specific antigens is also useful. Common and particular antigens determine the extent of protective responses against homologous or heterologous challenge. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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