TABLE 4.

Comparison of culture, Directigen FluA+B, immunofluorescence, and RT-PCR for influenza B virus

Culture resultImmunofluorescence resultDirectigen FluA+B resultNo. of specimensNo. of specimens positive by RT-PCR/no. tested
PositivePositivePositive213/3
PositiveNegativePositive7NDa
PositiveNegativeNegative3ND
PositiveIndeterminateNegative1ND
NegativeNegativePositive70/7
NegativeIndeterminateNegative6ND
NegativeNegativeNegative2050/13
  • a ND, not determined.