Table 7.
Sensitivity and specificity of avian influenza LFDs relative to VI in duck clinical specimens (n = 34)
| (a) Anigen LFD | |||
|---|---|---|---|
| VI | Total | ||
| + | − | ||
| Anigen LFD | |||
| + | 8F = 8 | 0 | 8 |
| − | 3T, 2C & 2F = 7 | 8T, 8C & 3F = 19 | 26 |
| Total | 15 | 19 | 34 |
| (b) Quickvue LFD | |||
|---|---|---|---|
| VI | Total | ||
| + | − | ||
| Quickvue LFD | |||
| + | 5F = 5 | 0 | 5 |
| − | 3T, 2C & 5F = 10 | 8T, 8C & 3F = 19 | 29 |
| Total | 15 | 19 | 34 |
LFD, lateral flow device; VI, virus isolation.
Anigen Sensitivity: 8/8 + 7 = 53·3% (95% CI: 26·6–78·7%); Specificity: 19/0 + 19 = 100% (82·4–100%).
Quickvue Sensitivity: 5/5 + 10 = 33·3% (95% CI: 11·8–61·6%); Specificity: 19/0 + 19 = 100% (95% CI: 82·4%–100%).
Abbreviations for clinical specimens (T, C and F) as explained in Table 1.