Table 2.
Interpretation criteria of the NovaLisa SARS‐CoV‐2 (COVID‐19) IgG, IgA, and IgM test (NovaTec and of the Platelia SARS‐CoV‐2 Total Ab method (Bio‐Rad) on the ETI‐Max 3000 controller
| Test | Result | Interpretation |
|---|---|---|
| NovaLisa | Ratio <9 | Negative |
| Ratio ≥9 and ≤11 | Doubtfula | |
| Ratio >11 | Positive | |
| Platelia | Ratio <0.8 | Negative |
| Ratio ≥0.8 and <1.0 | Doubtfulb | |
| Ratio ≥1.0 | Positive |
Abbreviations: IgA, immunoglobulin A; IgG, immunoglobulin G; IgM, immunoglobulin M; SARS‐CoV‐2, severe acute respiratory syndrome coronavirus 2.
a
Procedure: Antibodies against the pathogen could not be detected clearly. It is recommended to repeat the test with a fresh sample in 2 to 4 weeks. If the result is equivocal again the sample is judged as negative.
b
Should be retested in duplicate before final interpretation. In case of repeated equivocal result, another specimen should be collected and tested few days later.