precipitin


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Related to precipitin: precipitin test

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.

pre·cip·i·tin

(prē-sip'i-tin),
An antibody that under suitable conditions combines with and causes its specific and soluble antigen to precipitate from solution.

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.

precipitin

(prĭ-sĭp′ĭ-tĭn)
n.
An antibody that reacts with a specific soluble antigen to produce a precipitate.

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.

pre·cip·i·tin

(prĕ-sip'i-tin)
An antibody that under suitable conditions combines with and causes its specific and soluble antigen to precipitate from solution.

precipitin

see ANTIBODY.

Precipitin

An antibody in blood that combines with an antigen to form a solid that separates from the rest of the blood.

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.
References in periodicals archive ?
Transmission electron microscopy of the circumoval immune precipitin reaction on eggs.
Complement fixation, 37 (84) immunodiffusion, or tube precipitin Complement fixation only 10 (23) Immunodiffusion only 10 (23) Tube precipitin only 2 (5) Immunohistochemistry or culture 3 (7) only IgG/IgM enzyme immunoassay only 4 (9) * Of the 44 patients, 43 were interviewed and 41 completed the interview.
A positive antibody-antigen reaction was identified as precipitin lines formed between the serum and the protein preparations.
Key words: bird-breeder's lung, bird breeding, cockatiels, hypersensitivity pneumonitis, inspiratory squawk, lung, precipitin antibodies, respiratory sounds.
Serum precipitin analysis was strongly positive for precipitating antibodies to Mycobacterium sp.
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.
Such algorithms may include monitoring the initial rate of the precipitin reaction as well as a separate prereaction step.
Although the presence of precipitating antibodies can provide justification for environmental evaluation of exposure to specific antigens (10), the results of precipitin testing must be interpreted with knowledge of potential occupational and/or environmental exposures experienced by the patient.
The laboratory criteria consist of culture, histopathologic, or molecular evidence; or immunologic evidence in the form of detection of immunoglobulin M or immunoglobulin G by immunodiffusion, enzyme immunoassay, latex agglutination, tube precipitin, or complement fixation.