Skip to main content

Table 2 Comparing results of HIV Sentinel Survey (HSS) and conventional syphilis testing strategies using selected archived sera from 2007 HSS in Ghana

From: Performance of Syphilis Sentinel Surveillance in the context of endemic Treponematoses: experience from Ghana

Results (and interpretation) of RPR/TPHA retesting Results of HSS testing strategy n (%)
DS+/TPHA+ DS−/TPHA− DS+/TPHA− DS+/TPHA0 Total
RPR+/TPHA+ (Active infection) 168 (16.8)a 42 (3.8) 0 (0) 3 (8.3) 213 (9.6)
RPR+/TPHA−(Biological false positive reaction) 0 (0)a 11 (1.0) 0 (0) 0 (0) 11 (0.5)
RPR−/TPHA+ (Past/treated infection) 520 (51.9) 70 (6.2) 30 (50.8) 20 (55.6) 640 (28.9)
RPR−/TPHA−(Uninfected) 313 (31.3) 995 (89.0) 29 (49.2) 13 (36.1) 1,350 (61.0)
Total 1,001 (100) 1,118 (100) 59 (100) 36 (100) 2,214 (100)
  1. RPR rapid plasma reagin, TPHA Treponema pallidum haemagglutination assay, TPHA0TPHA results not available, DS determine syphilis TP, aIncludes 10 RPR+/TPHA − samples which were DS+; Excludes 10 RPR+/TPHA − samples which were DS+