TABLE 1.

Analysis of IgG concordant and discrepant sera between ICT and Toxo IgG Architect test by testing of 767 nonselected samples

IgG analysis	n	Architect valuea (UI/ml)	ICTb	Reference Western blotc (LDBio Toxo II IgG)	Conclusion
Concordant	582	0–1.3 (Neg)	Neg	NR	Neg IgG
Concordant	143	≥3	Pos	NR	Pos IgG
Minor discrepant	20	1.6–2.9 (gray zone)	Pos	Pos	Pos IgG
Discrepant	14	0.6–1.5 (Neg)	Pos	Pos	Pos IgG (false-negative Architect)
Discrepant	1	2.5 (gray zone)	Pos	Neg	Neg IgG (false-positive ICT)
Discrepant	7	0.1–0.3 (Neg)	Pos	Neg	Neg IgG (false-positive ICT)

^aIgG concentrations on Architect: negative, ≤1.5 IU/ml; gray zone, 1.6 to 2.9 IU/ml; positive, ≥3 IU/ml. Neg, negative.

^bPos, positive.

^cNR, not realized.