TABLE 2.
Performance of Directigen Flu A + B membrane immunoassay rapid test compared to that of viral culture for detection of influenza A and B viruses
| Influenza virus type detected | No. of specimens
|
Sensitivity (%) | Specificity (%) | % of specimens with indicated PVa
|
||||
|---|---|---|---|---|---|---|---|---|
| Rapid test +
|
Rapid test −
|
Pos | Neg | |||||
| Culture + | Culture − | Culture + | Culture − | |||||
| A and B | 96 | 10 | 123 | 3,863 | 43.8 | 99.7 | 90.5 | 96.9 |
| A only | 49 | 7 | 65 | 3,971 | 42.9 | 99.8 | 87.5 | 98.4 |
| B only | 47 | 3 | 58 | 3,984 | 44.8 | 99.9 | 94.0 | 98.6 |
a
PV, predicted value; Pos, positive; Neg, negative.