primary immune response
The immune response to the first challenge by a particular antigen. Usually less extensive than the secondary immune response, being slower and shorter-lived with smaller amounts of lower affinity antibody being produced.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • primary immune response — The immune response that occurs during the first encounter of a mammal with a given antigen …   Glossary of Biotechnology

  • immune response secondary — the immune response occurring on the second and subsequent exposures to an antigen; compared to a primary immune response, the lag period is shorter, the peak antibody titer is higher and lasts longer, IgG production predominates, the antibodies… …   Medical dictionary

  • immune response — The processes, including the synthesis of antibodies, that are used by vertebrates to respond to the presence of a foreign antigen. See: primary immune response; secondary immune response …   Glossary of Biotechnology

  • immune response primary — the immune response occurring on the first exposure to an antigen. After a lag or latent period of from 3 to 14 days depending on the antigen, specific antibodies appear in the blood. There is a peak of IgM production lasting several days… …   Medical dictionary

  • secondary immune response — The rapid immune response that occurs during the second (and subsequent) encounters of the immune system of a mammal with a specific antigen. See: primary immune response …   Glossary of Biotechnology

  • immune system — Anat. a diffuse, complex network of interacting cells, cell products, and cell forming tissues that protects the body from pathogens and other foreign substances, destroys infected and malignant cells, and removes cellular debris: the system… …   Universalium

  • immune system — n the bodily system that protects the body from foreign substances, cells, and tissues by producing the immune response and that includes esp. the thymus, spleen, lymph nodes, special deposits of lymphoid tissue (as in the gastrointestinal tract… …   Medical dictionary

  • Immune-mediated inflammatory diseases — Immune Mediated inflammatory Disease (IMID) is any of a group of conditions or diseases that lack a definitive etiology, but which are characterized by common inflammatory pathways leading to inflammation, and which may result from, or be… …   Wikipedia

  • Immune system — A scanning electron microscope image of a single neutrophil (yellow), engulfing anthrax bacteria (orange). An immune system is a system of biological structures and processes within an organism that protects against disease by identifying and… …   Wikipedia

  • response — 1. The reaction of a muscle, nerve, gland, or other excitable tissue to a stimulus. 2. Any act or behavior, or its constituents, that a living organism is capable of emitting. Reflexes are usually excluded because they are typically elicited by a …   Medical dictionary

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