Vi antigen

Vi antigen
Vi antigen 'vē-'ī- n a heat-labile somatic antigen thought to be associated with virulence in some bacteria (as of the genus Salmonella) and esp. in the typhoid fever bacterium and used to detect typhoid carriers through the presence in their serum of agglutinins against this antigen

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a K antigen of the bacteria causing typhoid fever (Salmonella enterica subsp. enterica serovar Typhi), originally thought to be responsible for virulence.

Medical dictionary. 2011.

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  • antigen-presenting cells — (APCs) are cells that take in protein antigens, process them, and present antigen fragments to B cells and T cells in conjunction with class II MHC molecules so that the cells are activated. Macrophages, B cells, dendritic cells, and Langerhans… …   Dictionary of microbiology

  • antigen-presenting cell — n any of various cells (as a macrophage or a B cell) that take up and process an antigen into a form that when displayed at the cell surface in combination with a molecule of the major histocompatibility complex is recognized by and serves to… …   Medical dictionary

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  • antigen — (n.) substance that causes production of an antibody, 1908, from Ger. Antigen, from Fr. antigène (1899), from anti (see ANTI (Cf. anti )) + Gk. gen (see GEN (Cf. gen)) …   Etymology dictionary

  • antigen — antigen. См. антиген. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • antigen-binding site — antigen combining site the region of the immunoglobulin molecule that binds to antigens; there is one such site on each of the two Fab regions of each immunoglobulin monomer …   Medical dictionary

  • antigen — àntigēn m DEFINICIJA biol. bilo koja supstanca koja u određenim uvjetima može inducirati specifičan imunološki odgovor i potaknuti stvaranje protutijela i senzibiliziranih T limfocita, s kojima onda reagira ETIMOLOGIJA anti + gen …   Hrvatski jezični portal

  • antigen — ► NOUN ▪ a harmful substance which causes the body to produce antibodies. DERIVATIVES antigenic adjective …   English terms dictionary

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