Cost-effectiveness of on-site antenatal screening to prevent congenital syphilis in rural eastern cape province, republic of south Africa

Objectives: On-site screening and same-day treatment of maternal syphilis in underresourced settings can avert greater numbers of congenital syphilis cases, but health outcomes and associated costs must be evaluated jointly. Methods: We used decision analysis to estimate the incremental cost-effectiveness of two on-site antenatal syphilis screening strategies to avert congenital infections-qualitative RPR (on-site RPR) and treponemal immunochromatographic strip assay (on-site ICS)-compared to the current practice (off-site RPR/TPHA). Findings: With antenatal active syphilis prevalence of 6.3%, the incremental cost-effectiveness of on-site ICS in averting congenital infections was estimated to be USD104, averting 82% of cases expected in absence of a program. The incremental cost-effectiveness of off-site RPR/TPHA was USD82 but would avert only 55% of congenital syphilis eases. On-site RPR was dominated by the other screening strategies. Conclusions: In settings of high maternal syphilis prevalence, onsite antenatal screening with ICS is a cost-effective approach to reduce the incidence of congenital syphilis.