TABLE 3.

Characterization and testing of specimens to establish the optimal T. gondii-specific IgG concentration range for the Architect Toxo IgG assay

Specimen	Avidity index by the Vidas Toxo IgG Avidity assay	IgG concn (IU/ml) by the Architect Toxo IgG assay
High-avidity specimen 1	0.575	260.3
High-avidity specimen 2	0.353	160.7
Low-avidity specimen	0.045	40.5