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.
References in periodicals archive ?
A) CPS distribution of isolates by capillary precipitin method and latex agglutination assay (indicating CPS expression).
A study of a natural population of Conomelus anceps (Germar) (Homoptera: Delfacidae) including observations on predation using the precipitin test.
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.
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.
Alpha-1AG tests were ran by placing serum samples in Alpha-1AG test plates, letting them sit in a humidified box at room temperature for 24-48 hours, then measuring the precipitin ring with a plastic scale.
The double gel diffusion precipitin (Ouchterlony) test has been used for quite some time.
Since the introduction at the turn of the century of the precipitin test for the medico-legal identification of bloodstains, several new techniques have been introduced and critically reviewed (Culliford, 1964; Gaensslen, 1983).
However, we have been unable, using the precipitin test of Pickavance (1970), to identify the presence of C.
Of the 44 patients, 37 (84%) received a diagnosis by using [greater than or equal to] 1 of the following serologic tests for Coccidioides exposure: complement fixation, immunodiffusion, or tube precipitin.
In addition, incipient exogenous allergic alveolitis was suspected because of the presence of budgerigars and cockatiels in the boy's home and the finding of serum positivity for IgG precipitin.
The blood meal source was identified by microscopic examination and precipitin technique using human antiserum as described earlier (11).