Table 2.
Nasopharyngeal and sputum specimens assayed as positive in RT-PCR and negative in RT-LAMP and vice versa.
| RT-PCR |
RT-LAMP | ||||
|---|---|---|---|---|---|
| Sample source | Sample number | Result | Ct value | Viral load (copies/10 μL) | Result (Tt value)a |
| Nasopharyngeal | 1 | + | 36.0 | 12.6 | – |
| 2 | + | 36.7 | <10 | – | |
| 3 | + | 36.7 | <10 | – | |
| 4 | + | 37.0 | <10 | – | |
| 5 | + | 37.0 | <10 | – | |
| 6 | + | 37.1 | <10 | – | |
| 7 | + | 37.2 | <10 | – | |
| 8 | + | 37.6 | <10 | – | |
| 9 | + | 38.3 | <10 | – | |
| Sputum | 1 | + | 35.7 | 18.9 | – |
| 2 | + | 36.8 | <10 | – | |
| 3 | + | 37.1 | <10 | – | |
| 4 | + | 37.2 | <10 | – | |
| 5 | + | 37.6 | <10 | – | |
| Nasopharyngeal | 1 | – | NA | NA | + (22.2) |
| Sputum | 1 | – | NA | NA | + (24.9) |
a
Tt, threshold time; NA, not applicable.