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Diagnostic sensitivity (Sn) and specificity (Sp) of the iELISA based on E. coli-expressed N protein for detecting SARS-CoV-2-specific antibodies in cat serum samples.
| iELISA | Positive | Negative | Total (number) |
|---|---|---|---|
| Positive (number) | 42 (Sn = 93.3%) | 1 | 43 |
| Negative (number) | 3 | 21 (Sp = 95.5%) | 24 |
| Predictive value | 97.7% | 87.5% |
