Table 1.
Equivocal zone or cut-off values recommended by the manufacturer of the Toxo IgG, Toxo IgM, Toxo IgG avidity, and Toxo IgA assays
| Technique | Equivocal zonea or cutoff value for indicated assay |
|||
|---|---|---|---|---|
| Toxo IgG (IU/ml) | Toxo IgM (index) | Toxo IgG avidity (index) | Toxo IgA (index) | |
| Advia Centaur | 10 | 0.9 | ||
| Architect | 1.6–2.9 | 0.50–0.59 | 0.50–0.59 | |
| AxSYM | 2–2.9 | 0.5–0.6 | ||
| Cobas | 6 | |||
| Dye test | 2 | |||
| Elecsys | 1–2.9 | 0.8–0.9 | ||
| Enzygnost | 4 | Determined for each plate | ||
| HSDA | 1–5 | |||
| ICT | 3 | 2 | ||
| Immunofluorescence | 6 or 8 | 1/40 | ||
| ISAGA | 6–8 | 6–8 | ||
| Liaison | 7.2–8.7 | 6.0–7.9 | ||
| Platelia | 6–8.9 | 0.8–0.9 | 0.40–0.49 | 6–8.9 |
| Toxo screen DA | 1–3 | |||
| Vidas | 4–7.9 | 0.55–0.64 | 0.20–0.29 | |
| Vidia | 3–4.9 | 0.68–0.99 | ||
a
In the equivocal zone, the lower value is the limit of negativity, and the higher value is the limit of positivity.