Table 3.
Discordant PCR results.
| Laboratory | Sample No | Assay | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Primary testing | Discordant testing | ||||||||
| RIPL | Viasure | LDT | RIPL | ||||||
| Result | Site | Result (Ct) | Site | Result (Ct) | Site | Result (Ct) | Site | ||
| NWLP | 1 | D | Lesion | ND | Throat | ND | Throat | – | – |
| 2 | D | Penile | ND | Throat | D (39.0) | Penile | – | – | |
| 3 | D | Swab | ND | Throat | ND | Throat | – | – | |
| 4 | D | Swab | ND | Skin | ND | Skin | – | – | |
| 5 | ND | Lesion | D (33.9) | Throat | Inhibitory | Lesion | – | – | |
| 6 | ND | Skin | D (29.0) | Throat | – | – | – | – | |
| 7 | ND | Throat | D (23.3) | Throat | D (28.8) | Throat | – | – | |
| 8 | ND | Skin | D (27.9) | Perianal | D (32.9) | Perianal | – | – | |
| 9 | ND | Hand | D (14.1) | Perianal | D (18.8) | Perianal | – | – | |
| 10 | ND | Swab | D (16.3) | Perianal | D (23.0) | Perianal | – | – | |
| SWLP | 11 | D | Skin | ND | Throat | – | – | – | – |
| 12 | D | Groin | ND | Throat | – | – | – | – | |
| 13 | D | Swab | ND | Throat | – | – | – | – | |
| 14 | ND | Throat | D (14.3) | Lesion | – | – | D | Lesion | |
| Synnovis | 15 | ND | Chest | D (19.5) | Leg | – | – | D (21.4) | Leg |
| 16 | ND | Groin | D (29.0) | Ear | – | – | D (30.9) | Ear | |
| 17 | ND | Lesion | D (14.5) | Lesion | – | – | D (19.1) | Lesion | |
| 18 | ND | Skin | D (38.1) | Skin | – | – | – | – | |
| 19 | ND | Perianal | D (38.0) | Lesion | – | – | – | – | |
RIPL, Rare and Imported Pathogens Laboratory; LDT, laboratory developed test; Ct, cycle threshold; NWLP, North West London Pathology; SWLP, South West London Pathology; D, detected; ND, not detected; -, Not performed.