Table 3.
The Comparison of Results Obtained from Dilution Series of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) in Copan UTM Tubes and Saline Tubes
| Dilution | Copan UTM |
Saline |
Copan UTM |
Saline |
Copan UTM |
Saline |
|---|---|---|---|---|---|---|
| Cobas result |
Amplidiag result |
LDT result |
||||
| (orf1ab CT/E gene CT) | (orf1ab CT/E gene CT) | (N gene CT/orf1ab CT) | (N gene CT/orf1ab CT) | (N gene CT) | (N gene CT) | |
| 1:10 | Pos (26.77/26.57) | Pos (26.57/26.67) | Pos (30.29/30.99) | Pos (32.47/32.6) | Pos (28.04) | Pos (25.65) |
| 1:20 | Pos (28.04/27.93) | Pos (27.34/27.48) | Pos (31.19/31.99) | Pos (33.3/32.77) | Pos (27.41) | Pos (27.70) |
| 1:100 | Pos (30.11/30.90) | Pos (29.28/29.77) | Pos (33.43/34.85) | Pos (37.76/37.46) | Pos (31.81) | Pos (31.38) |
| 1:200 | Pos (30.53/31.06) | Pos (29.95/30.47) | Pos (34.96/35.81) | Pos (37.67/39.61) | Pos (32.47) | Pos (32.91) |
| 1:1000 | Pos (31.64/32.94) | Pos (31.06/32.35) | Pos (37.86/38.82) | Neg (no CT/no CT) | Pos (30.00) | Pos (37.57) |
| 1:2000 | Pos (32.25/33.77) | Pos (31.90/33.74) | Pos (38.18/no CT) | Neg (no CT/no CT) | Neg (no CT) | Neg (no CT) |
| 1:10,000 | Pos (33.14/35.57) | Pos (33.04–35.43) | Neg (no CT/no CT) | Neg (no CT/no CT) | Neg (no CT) | Neg (no CT) |
| 1:20,000 | Pos (33.53/36.76) | Pos (33.88/35.61) | Neg (no CT/no CT) | Neg (no CT/no CT) | Neg (no CT) | Neg (no CT) |
| 1:100,000 | Pos (no CT/37.97) | Pos (no CT/36.41) | Neg (no CT/no CT) | Neg (no CT/no CT) | Neg (no CT) | Neg (no CT) |
LDT, laboratory-developed test.