TABLE 4.
Analysis of IgG concordant and discrepant sera between ICT and Toxo IgG Architect for ninety-two selected sera with low IgG titer
| Architect IgG valuea (IU/ml) | No. of sera | Positive ICT [no. positive/total no. (%)] | Conclusion [no. with positive IgGII Western blot/total no. (%)] |
|---|---|---|---|
| 0.6–0.7 | 7 | 3/7 (43) | 4/7 (57) |
| 0.8–0.9 | 7 | 5/7 (71) | 5/7 (71) |
| 1–1.2 | 12 | 11/12 (92) | 11/12 (92) |
| 1.3–1.5 | 12 | 10/12 (83) | 10/12 (83) |
| 1.6–2 | 16 | 15/16 (94) | 15/16 (94) |
| 2.1–2.9 | 27 | 27/27 (100) | 27/27 (100) |
| 3–3.4 | 11 | 11/11 (100) | 11/11 (100) |
a
IgG concentrations on Architect: negative, ≤1.5 IU/ml; gray zone, 1.6 to 2.9 IU/ml; positive, ≥3 IU/ml.