The Syphilis Antibody test screens for antibodies to Treponema pallidum, the bacterium that causes syphilis. It is used as an initial screening for syphilis infection.
Category: Infectious Disease
Also known as: syphilis antibody, rpr, vdrl, syphilis screen, treponema antibody, fta-abs, tp-pa, syphilis igg
Reference range: 0–1 S/CO (Source: ABIM)
Standard unit: S/CO
High values may indicate
A positive (reactive) result indicates current or past syphilis infection. Confirmatory testing is needed to distinguish active from treated infection.
Low values may indicate
A negative (non-reactive) result means no syphilis antibodies were detected, indicating no current or past infection.