Skip to main content
. 2010 Jul 7;17(8):1282–1290. doi: 10.1128/CVI.00096-10

FIG. 3.

FIG. 3.

Interassay comparison of the diphtheria antitoxin levels (IU/ml) of the standard panel tested by NT and seven different ELISAs: lab III in-house ELISA (A), lab XI in-house ELISA (B), Serion ELISA (C), Euroimmun ELISA (D), Virotech ELISA (E), NovaLisa ELISA (F), and VaccZyme ELISA (G). The slope of the regression (S), intercept (D), correlation coefficient (R) of the regression line (solid lines), and line of identity (dashed lines) are shown. Vertical and horizontal dotted lines indicate the cutoffs used by the NT reference laboratory to determine negative (<0.01 IU/ml), equivocal (0.01 to 0.09 IU/ml), and positive (≥0.1 IU/ml) sera.