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Table 2
Sensitivity, Specificity, PPV and NPV of anti-Toxoplasma IgG commercial assays included in the study.
| Assay | Sensitivity mean % (range) | Specificity mean % (range) | PPV mean % (range) | NPV mean % (range) | Comments |
|---|---|---|---|---|---|
| Access Toxo IgG II® | 89.7 | 100 | 100 | 92.8 | |
| Low IgG: 13.4 | Low IgG: 99.6 | ||||
| Advia Centaur® | 100 | 100 | 100 | 100 | Single study |
| Low IgG: 51.1 | |||||
| Architect Toxo IgG® | 90.7 (80.8–99.6) | 99.8 (99.5–100) | 99.7 (99.1–100) | 97.3 (94.6–99.5) | For low IgG, one study did not provide crude results [13] |
| Low IgG: 30.5 (12–43.9) | Low IgG: 100 | ||||
| Axsym Toxo IgG® | 96.1 (90.2–99.6) | 99.7 (99.5–100) | 99.7 (99.4–100) | 97.2 (93.1–99.5) | |
| BioPlex 2200 ToRCH IgG/IgM® | 97.8 | 91.3 | 98.5 | 87.5 | Single study |
| Elecsys Toxo IgG® | 98.6 (97.5–100) | 99.6 (98.7–100) | 99.2 (98.3–100) | 99.4 (98.7–100) | 100% concordance with DT for sera with interfering diseases |
| Low IgG: 88.6 (73.2–95.6) | Low IgG: 99.6 (99.3–100) | ||||
| Immulite 2000 anti-Toxoplasma IgG® | 93.5 (87.9–99) | 99.8 (99.6–100) | 99.4 | 92.7 | |
| Liaison Toxo IgG II® | 94.8 (93.8–95.8) | 99.5 (na) | 98.2 (96.8–99.5) | 97.4 (95.7–99.1) | One study merged results obtained with low and standard IgG titers (58.9% sensitivity) |
| Low IgG: 25.5 (6.7–58.9) | Low IgG: 100 | ||||
| Platelia Toxo IgG® | 96.4 (95.6–97.2) | 99.4 (98.7–100) | 98.4 (96.7–100) | 97.7 (97.1–98.3) | In one study, only 29/56 discrepant EIA were confirmed by DT |
| Low IgG: 47.6 (32.9–62.2) | Low IgG: 100 | ||||
| TGS TA Toxo IgG/IDS-iSYS® | 97 | 97 | nd | nd | |
| Low IgG: 46.3 | Low IgG: 96.7 | Low IgG: 86.4 | Low IgG: 79.8 | ||
| Vidas Toxo IgG® | 95.5 (91.4–100) | 99.8 (99.5–100) | 99.1 (96.8–100) | 97.7 (93.9–99.5) | |
| Low IgG: 44.2 (12.2–63.3) | Low IgG: 99.7 (99–100) | ||||
| Vitros ECiQ Toxoplasma IgG® | 93.4 | 100 | nd | nd | Single study, no separate analysis of IgG et IgM results |
| Pastorex Toxo® | 98.8 | 98.8 | 98.8 | 98.8 | Single study, 6.5% false-positive with interfering diseases, sensitivity 97.3% and 100% in acute and chronic toxoplasmosis, respectively |
| Low IgG: 51.5 | |||||
| Toxocell® | 96.8 | 97.6 | 97.6 | 96.8 | Single study, 11% false-positive results with interfering diseases, Sensitivity 97.3% and 100% in acute and chronic toxoplasmosis, respectively |
| Low IgG: 66.7 | |||||
| Toxo HAI® | 100 | 99.2 | 99.2 | 100 | Single study, 4.3% false-positive results with interfering diseases, Sensitivity 97.3% and 100% in acute and chronic toxoplasmosis, respectively |
| Low IgG: 97 | |||||
| Toxolatex® | 93.7 | 97.1 | 97.1 | 93.7 | Single study, 11% false-positive results with interfering diseases, Sensitivity 94.6% and 100% in acute and chronic toxoplasmosis, respectively |
| Low IgG: 51.5 | |||||
| OnSite Toxo IgG/IgM Combo Rapid Test® | 100 | 98 | 98.8 | 100 | Single study |
| Detects both specific IgG and IgM | |||||
| Toxo IgG/IgM Rapid Test ® Biopanda | 100 | 96 | 98.3 | 100 | Single study |
| Detects both specific IgG and IgM | |||||
| Toxoplasma ICT IgG/IgM® LDBio | 100 | 99.1 (98.6–100) | 97.6 (95.8–99.4) | 100 | Detects both specific IgG and IgM, 100% sensitivity in acute infections, 100% concordance with WB Toxo IgGII |
| WB Toxo IgGII® | Low IgG: 99.2 | 100 | 100 | 99.2 | Single study, 99.4% NPV, 100% concordance with DT for equivocal sera and interfering diseases |
PPV: positive predictive value; NPV: negative positive value; DT: dye-test; na: not applicable; nd: not determined.
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