Table 3.
Two cases of atypical seroconversion with weakly positive IgM by two techniques (Platelia and Liaison) and negative by three other techniques (ISAGA, immunofluorescence, and Elecsys)a
| Case | Date | Toxo IgG assay |
Toxo IgM index |
Toxo IgG avidity Platelia | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Platelia | Elecsys | Liaison | HSDA/dye test | IFAT | Platelia | Elecsys | Liaison | ISAGA-M | IFAT | |||
| 16 | 04/02/09 | 2b | <0.125 | 0 | 1/2 | Negative | 0.44 | 0.270 | 10 | 0 | 0 | |
| 05/11/09 | 6 | 8/10 | 0.32 | 0 | ||||||||
| 05/25/09 | 52c | 16.47 | 70 | 64/100 | Positive | 0.72 | 0.370 | 18 | 0 | 0 | 0.13 | |
| 05/29/09 | 57 | 84 | Positive | 0.81d | 9 | 0 | 0 | 0.14 | ||||
| 06/18/09 | 131 | 122 | Positive | 1.16 | 15 | 0 | 0 | 0.15 | ||||
| 17 | 09/29/08 | 0 | 0.13 | 0 | Negative | 0 | 4 | 1 | 0 | |||
| 11/03/08 | 1 | 3 | 7.6 | Positive | 1.39 | 0 | 7 | 3 | 0 | |||
| 11/29/08 | 30 | 15 | 43.3 | Positive | 0.85 | 0 | 7 | 1 | 0 | 0.27 | ||
| 12/10/08 | 46 | 43 | 55.6 | Positive | 0.73 | 0 | 8 | 1 | 0 | 0.22 | ||
| 12/29/08 | 13 | 56.3 | Positive | 0.52 | 8 | 1 | 0 | 0.2 | ||||
| 01/30/09 | 37.3 | Positive | 8 | 0 | ||||||||
a
Detailed results of IgG, IgM, IgA, and avidity index on 2 atypical seroconversion panels.
b
Nonreactive results are not highlighted.
c
Reactive results are in bold type and highlighted in gray.
d
Equivocal zone results are in bold type.