TABLE 3.
Discordant prospective specimen summarya
| Specimen | ASI card |
AIX1000 |
Treponemal antibody status | Interpretation | ||
|---|---|---|---|---|---|---|
| Screen | Titer | Screen | Titer | |||
| 464 | NR | − | RX | 1:4 | RX | ASI card false negative |
| 471 | NR | − | RX | 1:2 | RX | ASI card false negative |
| 613 | NR | − | RX | 1:1 | NR | AIX false positive |
| 629 | NR | − | RX | 1:8 | RX | ASI card false negative |
| 701 | NR | − | RX | 1:1 | RX | ASI card false negative |
| 850 | NR | − | RX | 1:1 | RX | AIX false positive |
| 1002 | NR | − | RX | 1:1 | NR | AIX false positive |
| 1009 | NR | − | RX | 1:1 | RX | ASI card false negative |
| 1205 | RX | 1:4 | RX | 1:1 | NR | Dual false positive |
| 1241 | NR | − | RX | 1:1 | NR | AIX false positive |
| 1247 | NR | − | RX | 1:1 | NR | AIX false positive |
| 1300 | RX | 1:1 | NR | − | NR | ASI card false positive |
| 1412 | NR | − | RX | UNDb | RX | ASI card false negative |
a
NR, nonreactive; RX, reactive. Treponemal antibody status was defined as detection of a TP-PA RX result plus 1 additional RX treponeme-specific chemiluminescent immunoassay result. (See the “Traditional testing algorithm” section in Materials and Methods.)
b
UND, unable to determine (insufficient specimen volume for titer).