When the quantitative RPR card test is performed on patients with syphilis, a fourfold rise in titer in a repeat specimen may suggest an infection, a reinfection, or a treatment failure; a fourfold decrease in titer following treatment for early syphilis usually indicates that therapy was adequate...
Table 2. Antibody recycling model predictions for RPR half-life (𝑡1/2t1/2), time to fourfold reduction in initial titer (𝑡1/4t1/4), and time to seroreversion (𝑡𝑟𝑒𝑣𝑒𝑟𝑡trevert) in pregnant parents and infants. 4. Discussion Here we describe the kinetics of decli...