A collection of reagents and other associated materials intended to be used for the qualitative and/or quantitative detection of non-specific reagin antibodies that are produced in response to infection with Treponema pallidum bacteria, in a clinical specimen using an agglutination method [for example Rapid Plasma Reagin (RPR) test or Venereal Disease Research Laboratory (VDRL) test]. The assay is designed to detect infection with Treponema pallidum, the bacteria associated with syphilis.