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precipitin
(redirected from precipitin reaction)

    Also found in: Dictionary/thesaurus, Legal, Financial, Encyclopedia, Wikipedia 0.01 sec.
precipitin /pre·cip·i·tin/ (-sip´it-in) an antibody to soluble antigen that specifically aggregates the macromolecular antigen in vivo or in vitro to give a visible precipitate.
pre·cip·i·tin (pr-sp-tn)
n.
An antibody that under suitable conditions combines with and causes a specific soluble antigen to precipitate.
Precipitin
An antibody in blood that combines with an antigen to form a solid that separates from the rest of the blood.
Mentioned in: Allergic Bronchopulmonary Aspergillosis
precipitin
[prəsip′itin]
Etymology: L, praecipitare + Gk, anti, against; AS, bodig, body; Gk, genein, to produce
an antibody that causes the formation of an insoluble complex when combined with a specific soluble antigen. Compare agglutinin. See also agglutination, antiglobulin.
precipitin [pre-sip´ĭ-tin]
an antibody to antigen that specifically aggregates the antigen in vivo or in vitro to give a visible precipitate.
precipitin reaction a reaction involving the specific serologic precipitation of an antigen in solution with its specific antiserum in the presence of electrolytes. The reaction is used in the typing of pneumococcus strains, in testing whether blood is human or animal, and for diagnostic purposes.
precipitin test any test in which the positive reaction consists of the formation and deposit of a precipitate in the fluid being tested. See also precipitin reaction.
precipitin
an antibody to soluble antigen that specifically aggregates the antigen in vivo or in vitro to give a visible precipitate.
precipitin curve
a plot showing the amount of antibody precipitated with increasing amounts of antigen added in a precipitin reaction.
precipitin reaction, precipitin test
a reaction involving the specific precipitation of an antigen in solution by mixing with a specific antiserum in the presence of electrolytes. See also lattice theory.
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In fact, our patient showed definite positive precipitins to cockatiel antigen, as well as a definite positive reaction to pigeon sera and very weakly positive precipitin reactions to droppings extracts of pigeons, canaries, and parakeets.
Cockatiel-induced hypersensitivity pneumonitis. (Grand Rounds in ... by Brooks, Stuart M. / Environmental Health Perspectives
These methods may be 1,000 times more sensitive than counterimmunoelectrophoresis (CIE) and immunodiffusion (ID) tests that require precipitin reactions between antibodies and tissue/cell extracts.
Human autoimmune diseases: Progress in clinical laboratory tests by Nakamura, Robert M. / Medical Laboratory Observer
 
 
 
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