Determination of plasma reagents
 SLIDE AND MICROPLATE TESTS

 Principle:
 The RPR-carbon antigen is a nontreponemal preparation specifically developed for rapid detection and semiquantitation by clotting on a slide or microplate plasma reagents, a group of antibodies directed against tissue components produced by almost every patient infected with T. pallidum.
 The assay, also known as rapid plasma reagin (RPR), is performed by testing antigen, an association of lipid complexes and particle carbon, against unknown samples. The presence or absence of visible agglutination indicates the presence or absence of circulating antibodies in the samples tested.