Toxoplasma IgGII Western blot (LDBIO Diagnostics) profiles. These profiles were obtained from 11 sera of the panel corresponding to nonspecific IgG on Architect with a negative ICT. C, control; C1, positive control with IgG of 5 UI/ml on Architect; C2, positive control with IgG of 1.2 UI/ml on Architect; C3, positive control of a confirmed seroconversion with IgG of 0.6 UI/ml on Architect; P, panel. Eleven sera were used: P1, IgG of 3.2 UI/ml on Architect, negative ICT, 2 bands (i.e., negative) with Toxo II IgG Western blot analysis; P2 to P4, IgG of 3.2 to 21.6 UI/ml on Architect, negative ICT, 1 band (i.e., negative) with Toxo II IgG Western blot analysis; P5 to P11, IgG of 3.8 to 6.7 UI/ml on Architect, negative ICT, 0 band (i.e., negative) with Toxo II IgG Western blot analysis; P6 to P10, not presented.