Table 2.
Relationship between indicative virus load (Ct values) of the PCR-positive samples and the resultant diagnostic performance of Coris-Ag a.
| Viral load category of PCR-positive samples | Total PCR (true) positiveb | Positive Coris-Ag (% of Ct category)c | Negative Coris-Ag (% of false negatives)d |
|---|---|---|---|
| Very high viral load (Ct<25) | 13 | 11 (84.6) | 2 (8.7) |
| High viral load (25 < Ct<30) | 14 | 8 (57.1) | 6 (26.1) |
| Medium viral load (30 < Ct<35) | 8 | 0 (0) | 8 (34.8) |
| Low viral load (Ct > 35) | 7 | 0 (0) | 7 (30.4) |
| Total | 42 | 19 (45.2) | 23 (100) |
a
Based on the 30-min readings of the 294 samples.
b
Positives identified by the gold standard RT-PCR assay.
c
Percentages were of the total number of positives in each virus load category by the gold standard RT-PCR assay.
d
Total number of false-negatives was 23.