Table 1.
Results of RT-qPCR, Xpert, and FilmArray
| RT-qPCR | Xpert | FilmArray | Number of samples (n = 165) | Mean viral loads of RT-qPCR [log10 copies/mL] (range)* | Mean RT-qPCR Ct value (range) | Mean Xpert Ct value (N2) (range) | Mean Xpert Ct value (E) (range) |
|---|---|---|---|---|---|---|---|
| Pos | Pos | Pos | 97 | 5.0 (0.2–8.0) | 21.5 (12–40) | 23.7 (14.2–42.6) | 21.7 (12.6–42) |
| Pos | Pos | Neg | 2 | 0.7 (0–1.4) | 39 (38–40) | 40.4 (39.1–41.6) | 44.1* |
| Pos | Neg | Pos | 1 | 0.8 | 38 | NA | NA |
| Pos | Neg | Neg | 0 | NA | NA | NA | NA |
| Neg | Pos | Pos | 0 | NA | NA | NA | NA |
| Neg | Pos | Neg | 0 | NA | NA | NA | NA |
| Neg | Neg | Pos | 0 | NA | NA | NA | NA |
| Neg | Neg | Neg | 65 | NA | NA | NA | NA |
Pos positive, Neg negative, RT-qPCR quantitative reverse transcriptase polymerase chain reaction, Ct threshold cycle, N nucleocapside, E envelope, NA not applicable
*One of the two samples did not exceed the threshold, and the Ct value could not be determined