TABLE 4.
Performance of the screening assays for detection of variants of concern or interest
| Screening assay result | No. of WGS results (n = 102) fora: |
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Variants of concern |
Variants of interest |
|||||||||||||
| B.1.1.7 |
B.1.351 |
P.1 |
B.1.427 or B.1.429 |
B.1.525 |
P.2, B.1.526, or R.1 |
20G/501Yb or B.1.1.165 |
||||||||
| Pos | Neg | Pos | Neg | Pos | Neg | Pos | Neg | Pos | Neg | Pos | Neg | Pos | Neg | |
| Pos | 25 | 0 | 0 | 0 | 5 | 0 | 3 | 5c | 1 | 0 | 6d | 0 | 16 | 0 |
| Neg | 0 | 77 | 0 | 102 | 0 | 97 | 0 | 94 | 0 | 101 | 0 | 96 | 0 | 86 |
a
For each comparison of positive (Pos) and negative (Neg) screening assay results and WGS results for each variant shown, there was 100% positive percentage of agreement (PPA) and 100% negative percentage of agreement (NPA), except for B.1.351 (PPA not applicable) and B.1.427 or B.1.429 (PPA of 37.5%).
b
As in reference 14.
c
All five samples were identified carrying a newly emerged variant: B.1.526.1.
d
Five samples were identified as strain P.2, and one sample was strain R.1.