Table 1.
Number of positive antigen point-of-care tests of serial dilutions of SARS-CoV-2 N and SARS-CoV-2 cell culture supernatant (triplicates)
| Abbott | RapiGEN | Healgen | Coris BioConcept | R-Biopharm | nal von minden | Roche-SD Biosensor | |
|---|---|---|---|---|---|---|---|
| SARS-CoV-2 N concentration, ng/mL | |||||||
| 1000 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| 250 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| 50 | 3 | 0 | 3 | 3 | 3 | 3 | 3 |
| 25 | 3 | 0 | 3 | 3 | 3 | 3 | 3 |
| 10 | 3 | 0 | 3 | 0 | 3 | 3 | 3 |
| 5 | 2 | 0 | 3 | 0 | 3 | 2 | 3 |
| 2·5 | 0 | 0 | 3 | 0 | 3 | 0 | 0 |
| SARS-CoV-2, plaque-forming unit per mL | |||||||
| 8800 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| 880 | 3 | 2 | 3 | 3 | 3 | 3 | 3 |
| 88 | 3 | 0 | 3 | 0 | 3 | 1 | 3 |
| 8·8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 0·88 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Protein and virus were diluted in phosphate-buffered saline. 50 μL was used for testing. SARS-CoV-2 N=recombinant SARS-CoV-2 nucleoprotein.