TABLE 2.

Sensitivity and specificity of the four ELISAs and IHA^a

Assay	Cutoff	% Sensitivity for Thai melioidosis patients (n = 141)	% Specificity for U.S. healthy donors (n = 90)
OPS-ELISA	0.41	82.3	85.6
	0.46	80.9	90.0
	0.66	75.2	95.6
	0.87b	71.6	96.7
CPS-ELISA	0.55	61.7	85.6
	0.75	56.0	90.0
	0.95	48.2	95.6
	1.18b	43.3	95.6
WC-ELISA	0.51	78.0	85.6
	0.57	75.2	90.0
	0.81	70.2	95.6
	0.83b	70.2	95.6
CF-ELISA	0.54	80.9	85.6
	0.61	78.0	91.1
	0.73	73.7	95.6
	0.97b	66.7	96.7
IHA	1:10	90.8	77.8
	1:20	85.8	88.9
	1:40	84.4	95.6
	1:2,560b	26.2	100

^aThe assay values were calculated from Thai melioidosis patients and U.S. healthy donors.

^bOD cutoff at 95% specificity when Thai donors were used as controls.