| Specificity % | IgM | IgG | IgM + IgG |
| ≤90% | 0 (0%) | 0 (0%) | 0 (0%) |
| 90% - 95% | 1 (4%) | 1 (4.2%) | 3 (16.7%) |
| 95% - 97.5% | 7 (28%) | 4 (16.7%) | 7 (38.9%) |
| ≥97.5% | 17 (68%) | 19 (79.2%) | 8 (44.4%) |
| Total | 25 (100%) | 24 (100%) | 18 (100%) |