TABLE 2.

Presence of IgM, IgA, and IgE in blood of infants < 3 months old with (group I+) and without (group I−) congenital toxoplasmosis

Ig (assay)	Presencea	No. in group I + (n = 42)	Mean valuec	No. in group I − (n = 374)	Mean valuec	Total no.	Sensitivity (%)	Specificity (%)
IgM (ICT)	−	15	6.3	362	0.1	377	64.3	96.8
	+	27		12		37
IgA (ICT)	−	10	6.4	329	0.2	339	76.2	88
	+	32		45		77
IgE (ELISA)	−	17	0.85b	344	0.22b	361	59.5	91.9
	+	25		30		55

^a−, absent; +, present.

^bIndex.

^cMaximum possible value, 12.