precipitin


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Related to precipitin: precipitin test

precipitin

[prə′sip·ə·tən]
(immunology)
An antibody that chemically interacts with an antigen to form a precipitate.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Mortalities of the larvae of Anopheles gambiae Giles complex and detection of predators by precipitin test.
In 1925, Hektoen and Schulhof [2, 3] in their animal studies with thyroglobulin (Tg) precipitins proposed that Tg provoked an immune response.
Precipitin lines start appearing after 10-12 h of incubation at 28[degrees]C and are distinctly visible in about 36 to 42 h (Figure 2).
Toxin testing: The WHO Streptococcus and Diphtheria Reference Unit (SDRU) modified the Elek Test, which employs antitoxin-impregnated disks that create precipitin lines (a positive reaction) when toxin-producing C diphtheriae is present on an agar plate after 24 hours of incubation.
Precipitin and agglutination reactions are used as diagnostic tools for identifying and quantifying the antibodies of infectious organisms in blood samples and other body fluids.
Precipitation reactions occur when soluble antigen (also called precipitinogen) is made insoluble by an antibody (also called a precipitin).
This is the first epitope of Sm B to be bound by autoantibody and defines the initiation of autoimmunity in all anti-SM precipitin positive patients with the appropriate samples tested to date.
The circumoval precipitin (COP) test was described by Oliver-Gonzalez in 1954 as a schistosome egg-specific test "which may be of diagnostic and prognostic value." Its elegance resides in its simplicity requiring only a microscope, microscope slides and cover-slips, serum or plasma and schistosome eggs.
Spider researchers have for a long time been much more likely to use indirect methods to detect prey proteins in the gut, such as precipitin test.
* The laboratory criteria for diagnosis are cultural, histopathologic, or molecular evidence of the presence of Coccidioides spp; a positive serologic test for coccidioidal antibodies in serum or cerebrospinal fluid by 1) detection of coccidioidal IgM by immunodiffusion, enzyme immunoassay (EIA) latex agglutination, or tube precipitin or 2) detection of rising titer of coccidioidal IgM by immunodiffusion, EIA, or complement fixation; or a coccidioidal skin test conversion from negative to positive after the onset of clinical signs and symptoms.