Comparison of the VDRL slide, TPI, and FTA-ABS tests in experimental syphilis in rabbits.

Abstract
The FTA-ABS [fluorescent treponemal antibody absorption] procedure was more sensitive and more specific than the VDRL [ Veneral Disease Research Laboratory] slide test, and more sensitive and just as specific as the TPI [Treponema pallidum Immobilization] test. The results and patterns obtained parallel those found in human syphilis.