Sensitivities move most across stages; specificities barely. Edit any value below to override.
Your patient's result
What the number means
The posterior is P(genuine T. pallidum infection) — active, latent, or past/treated.
It does not by itself separate active from treated disease; that is the work of the RPR
titer plus treatment history.
Defaults are editable literature ballparks for Tp EIA/CIA, RPR, and TP-PA — set them to your lab's
validated performance and local stage mix. Sensitivities move a lot by stage; use the toggle.
Educational tool · not a substitute for clinical judgment, titers, or direct detection (darkfield/PCR).