TABLE 3.

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

Culture result	Immunofluorescence result	Directigen FluA+B result	No. of specimens	No. of specimens positive by RT-PCR/no. tested
Positive	Positive	Positive	22	3/3
Negative	Positive	Positive	2	2/2
Negative	Positive	Negative	1	1/1
Negative	Negative	Positive	1	0/1
Negative	Indeterminate	Negative	7	NDa
Negative	Negative	Negative	217	0/16

^aND, not determined.