TABLE 3.

Evaluation of three serologic assays for the detection of H5-specific antibody in confirmed and suspected H5N1 virus-infected individuals and nonexposed controls

Age group	Serum	Sample	H5-specific antibody response
			Na	ELISAb		WBa
				IgG	IgM
Children
	B	S1	10	5.6	5.6	−
		S2	80	16.6	5.6	+d
	F	S2	14	14.6	16.6	+d
	G	S1	10	5.6	8.6	−
		S2	320	14.6	14.6	+d
	H	S1	10	5.6	5.6	NTe
		S2	450	18.6	16.6	+
	Control (n = 24)		11	6.0	5.6
Adults
	A	S1	20	18.6	5.6	+
		S2	160	18.6	5.6	+
	D	S1	10	6.6	6.6	−
		S2	320	18.6	18.6	+d
	I	S1	10	5.6	5.6	−
		S2	1,280	18.6	18.6	+
	J	S2	10	5.6	5.6	−
	Control (n = 46)		20	11.0	6.0

^aN, microneutralization assay; GMT to A/Hong Kong/156/97 virus. 

^bGMT (log₂). 

^cW, Western blotting. +, positive; −, negative. 

^dSerum also positive with IgM. 

^eNT, not tested.