adaptive immunity medical definition
Adaptive Immunity Definition. Adaptive immunity is an important part of the immune system. It is protection from an infectious disease agent that is mediated by B-and T-lymphocytes following exposure to specific antigen, and characterized by immunological memory. Adaptive immunity is an important part of the immune system. It is protection from an infectious disease agent that is mediated by B-and T-lymphocytes following exposure to specific antigen, and characterized by immunological memory. acquired immunity. antigen specific immunity attributable to the production of antibody and of specific immune T lymphocytes (responsible for cell-mediated immunity), following exposure to an antigen, or passive transfer of antibody or immune lymphoid cells (adoptive immunity). The adaptive immune or specific immune response consists of antibody responses and cell-mediated responses, which are carried out by different lymphocyte cells, B cells and T cells, respectively. The adaptive immune system comprises lymphocytes (B cells and T cells) having a small number of genetically encoded proteins that can combine in such a way as to produce an enormous variety of proteins, having the potential to fight any antigen encountered. Definition: Protection from an infectious disease agent that is mediated by B-and T-LYMPHOCYTES following exposure to specific antigen, and characterized by IMMUNOLOGIC MEMORY. The adaptive immune system comprises lymphocytes (B cells and T cells) having a small number of genetically encoded proteins that can combine in such a way as to produce an enormous variety of proteins, having the potential to fight any antigen encountered. Acquired immunity: Immunity acquired by infection or vaccination (active immunity) or by the transfer of antibody or lymphocytes from an immune donor (passive immunity). Acquired immunity is in contrast to innate immunity (natural immunity). includes acquired (active) immunity produced by deliberate exposure to an antigen, such as a vaccine or the administration of antibody (passive). cellular immunity. dependent upon T lymphocytes which are sensitized by first exposure to a specific antigen. Medical Definition of ACQUIRED IMMUNITY. : immunity that develops after exposure to a suitable agent (as by an attack of a disease or by injection of antigens)—compare active immunity, innate immunity, passive immunity.
It is protection from an infectious disease agent that is mediated by B-and T-lymphocytes following exposure to specific antigen, and characterized by immunological memory.