| RIPA | Radio-Immuno(= Immune)-Precipitation(Precipitin) Assay |
|---|---|
| AGPI | agar gel precipitin inhibition |
| COPT | circumoval precipitin reaction test |
| GDF | gel diffusion precipitin |
| GDP | gel diffusion precipitin; gross domestic product; guanosine diphosphate |
| AGP | Agar Gel Precipitin |
|---|---|
| COPT | Circumoval Precipitin Test |
| aspergillosis precipitin | <investigation> A test which is used to detect the presence of aspergillus antibodies in the blood. The normal result is read as negative or no antibodies. A strong reaction can indicate pulmonary aspergillosis. Some forms of hypersensitivity pneumonia may also yield a weakly positive test result. (27 Sep 1997) |
|---|---|
| gel diffusion precipitin tests | Precipitin test's in which the immune precipitate forms in a gel medium (usually agar) into which one or both reactants have diffused; generally classified in two types, in one dimension, and in two dimensions. Synonym: gel diffusion reactions. (05 Mar 2000) |
| gel diffusion precipitin tests in one dimension | Precipitin test's in which antigen solution and antibody incorporated in agar are layered in tubes, permitting effective diffusion in the vertical dimension; the antibody-containing agar may be overlaid directly with antigen solution (single (gel) diffusion in one dimension). (05 Mar 2000) |
| gel diffusion precipitin tests in two dimensions | Precipitin test's made in a layer of agar that permits radial diffusion, in both of the horizontal dimensions, of one or both reactants. Double (gel) diffusion in two dimensions (Ouchterlony test, technique, or method) incorporates antigen and antibody solutions placed in separate wells in a sheet of plain agar, permitting radial diffusion of both reactants; this method is widely used to determine antigenic relationships; the bands of precipitate that form where the reactants meet in optimal concentration are of three patterns, referred to as reaction of identity, reaction of partial identity (cross-reaction), and reaction of nonidentity. (05 Mar 2000) |
| ring precipitin test | A precipitin test in which antigen solution is carefully layered over antibody solution in a tube; as diffusion proceeds, a disk of precipitate forms where the antibody ratio is optimal. Synonym: ring test. (05 Mar 2000) |
| precipitin | <protein> Any antibody that forms a precipitating complex (a precipitin line) with an appropriate multivalent antigen. The term is now outmoded. (18 Nov 1997) |
| precipitin reaction | See: precipitin, precipitin test. (05 Mar 2000) |
| precipitin test | An in vitro test in which antigen is in soluble form and precipitates when it combines with added specific antibody in the presence of an electrolyte. See: gel diffusion precipitin tests, ring precipitin test. Synonym: precipitation test. (05 Mar 2000) |
| precipitin tests | Serologic tests in which a positive reaction manifested by visible precipitation occurs when a soluble antigen reacts with its antibody. (12 Dec 1998) |
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