Categories of HSS results
|
DS+/TPHA+
|
DS−/TPHA0
|
DS+/TPHA−
|
DS+/TPHA0
|
aDS0/TPHA+
|
Total
|
---|
Number of all HSS samples
|
1,097
|
17,041
|
135
|
62
|
31
|
18,366
|
Number of selected samples
|
1,001
|
1,118
|
59
|
36
|
0
|
2,214
|
Number of RPR+/TPHA+ cases
|
158
|
42
|
0
|
3
|
0
|
203
|
Estimated number of active syphilis cases
|
173.15
|
640.18
|
0
|
5.17
|
NS
|
818.50
|
- DS Determine syphilis TP, TPHA Treponema pallidum haemagglutination assay, RPR Rapid plasma reagin, TPHA0 − TPHA result not available, DS0 DS result not available, NS samples not selected for retesting, aDS0/TPHA+ samples (n = 31) were excluded from the final analysis. Therefore, denominator for the overall estimate was (18,366–31) =18,335
- Note: Only DS+/TPHA+ samples were regarded as “syphilis” seropositive samples (more accurately, treponemal seropositives) during the sentinel survey; all other samples were considered to be negative