Table 6.
Sensitivity and specificity of avian influenza LFDs relative to VI in chicken clinical specimens (n = 59)
| (a) Anigen LFD | |||
|---|---|---|---|
| VI | Total | ||
| + | − | ||
| Anigen LFD | |||
| + | 5T, 3C & 17F = 25 | 0 | 25 |
| − | 5T, 5C & 2F = 12 | 8T, 10C & 4F = 22 | 34 |
| Total | 37 | 22 | 59 |
| (b) Quickvue LFD | |||
|---|---|---|---|
| VI | Total | ||
| + | − | ||
| Quickvue LFD | |||
| + | 5T, 3C & 12F = 20 | 0 | 20 |
| − | 5T, 5C & 7F = 17 | 8T, 10C & 4F = 22 | 39 |
| Total | 37 | 22 | 59 |
LFD, lateral flow device; VI, virus isolation.
Anigen Sensitivity: 25/25 + 12 = 67·6% (95% CI: 50·2–82·0%); Specificity: 22/0 + 22 = 100% (95% CI: 84·6–100%).
Quickvue Sensitivity: 20/20 + 17 = 54·1% (95% CI: 36·9–70·5%); Specificity: 22/0 + 22 = 100% (95% CI: 84·6–100%).
Abbreviations for clinical specimens (T, C and F) as explained in Table 1.