primary immune response


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im·mune re·sponse

1. any response of the immune system to an antigen including antibody production and/or cell-mediated immunity;
2. the response of the immune system to an antigen (immunogen) that leads to the condition of induced sensitivity; the immune response to the initial antigenic exposure (primary immune response) is detectable, as a rule, only after a lag period of from several days to 2 weeks; the immune response to a subsequent stimulus (secondary immune response) by the same antigen is more rapid than in the case of the primary immune response.

im·mune re·sponse

(i-myūn' rĕ-spons')
1. Any response of the immune system to an antigen including antibody production or cell-mediated immunity.
2. The response of the immune system to an antigen (immunogen) that leads to the condition of induced sensitivity; the immune response to the initial antigenic exposure (primary immune response) is detectable, as a rule, only after a lag period of from several days to 2 weeks; the immune response to a subsequent stimulus (secondary immune response) by the same antigen is more rapid than in the case of the primary immune response.

primary immune response

The weak initial reaction caused by the first encounter of a ‘naive’ lymphocyte with a particular antigen. Antibodies are nor detectable for several days then rise to a (low) peak concentration and then fall again. If now there is a second challenge with the same antigen, there is a more rapid and much higher rise in the level of antibodies. This is the secondary immune response.

primary

first; basic.

primary accession
the first contact with the veterinarian by an animal for the particular condition or disease incident that is the cause of the visit.
primary accession practice
a veterinary practice that does most of its work with primary accession cases—not a specialty practice.
primary bile acids
see bile acids.
primary carcinogens
substances that react directly with a specific biological group in living tissue resulting in the development of a neoplasm. They are mostly synthetic compounds or metals.
primary case
the patient which brings the disease into the population.
primary complex of Ranke
in the pathogenesis of tuberculosis is the primary lesion with a similar lesion in the draining lymph node.
primary health care
routine outpatient care.
primary immune response
see humoral immunity.
primary intention healing
see healing by first intention.
primary rumen cycle
primary ruminal tympany
intrinsic to reticuloruminal dysfunction; not secondary to traumatic reticulitis, esophageal obstruction.
primary ruminant gastrointestinal dysfunction
dysfunction intrinsic to the gastrointestinal tract of the ruminant; not secondary to dysfunction in some other organ.
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