Trend of methods used in syphilis serology proficiency testing in 2018–2019
| Serologic tests for syphilis | Methods | 2018 | 2019 | |||
|---|---|---|---|---|---|---|
| 1st trial | 2nd trial | 1st trial | 2nd trial | |||
| Nontreponemal | VDRL | 54 (9.4) | 54 (9.4) | 53 (9.0) | 54 (9.2) | |
| RPR card | 299 (51.9) | 298 (51.8) | 301 (51.3) | 300 (51.0) | ||
| RPR TIA | 206 (35.8) | 206 (35.8) | 218 (37.1) | 222 (37.8) | ||
| RPR unknown | 17 (3.0) | 17 (3.0) | 15 (2.6) | 12 (2.0) | ||
| Total | 576 (100.0) | 575 (100.0) | 587 (100.0) | 588 (100.0) | ||
| Treponemal | FTA-ABS | 12 (4.3) | 12 (4.3) | 12 (4.3) | 12 (4.3) | |
| TPPA | 103 (37.2) | 96 (34.7) | 92 (33.0) | 86 (30.7) | ||
| TPLA |
43 (15.5) | 42 (15.2) | 44 (15.8) | 45 (16.1) | ||
| CLIA | 42 (15.2) | 48 (17.3) | 48 (17.2) | 46 (16.4) | ||
| ICA | 72 (26.0) | 73 (26.4) | 76 (27.2) | 85 (30.4) | ||
| Unknown | 5 (1.8) | 6 (2.2) | 7 (2.5) | 6 (2.1) | ||
| Total | 277 (100.0) | 277 (100.0) | 279 (100.0) | 280 (100.0) | ||
Values are presented as numbers (%).
Abbreviations: VDRL, Venereal Disease Research Laboratory; RPR, rapid plasma reagin; TIA, turbidimetric immunoassay; FTA-ABS, fluorescent treponemal antibody absorption; TPPA,
*TPLA is one of the automated treponemal tests based on TIA.