1 SST/1.0 mL serum. After 30 minutes of clotting, promptly centrifuge and refrigerate serum.
Room Temp: 7 days; Refrigerated: 14 days; Frozen: 2 months
Because RPR is a non-treponemal test, it is useful for screening, monitoring treatment and detecting reinfection. Positive tests will reflex to FTA for conformation