delayed reaction


delayed reaction

 a reaction, such as an allergic reaction, occurring hours to days after exposure to an inducer.

de·layed re·ac·tion

a local or generalized response that begins 24-48 hours after exposure to an antigen involving sensitized T cells. See: cell-mediated reaction. Synonym(s): contact hypersensitivity (2) , delayed hypersensitivity (2) , late reaction, late-phase reaction, tuberculin-type hypersensitivity

de·layed re·ac·tion

(dĕ-lād' rē-ak'shŭn) A local or generalized immune response that begins 24-48 hours after exposure to an antigen.
See: cell-mediated reaction