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 detectedNo. of specimensSensitivity (%)Specificity (%)% of specimens with indicated PVa
Rapid test +Rapid test −PosNeg
Culture +Culture −Culture +Culture −
A and B96101233,86343.899.790.596.9
A only497653,97142.999.887.598.4
B only473583,98444.899.994.098.6
  • a PV, predicted value; Pos, positive; Neg, negative.