Table 1.

Relative sensitivity (Se), relative specificity (Sp), kappa coefficient (ƙ) and area under the curve (AUC) of the two cELISA (ID Screen® cELISA, Immunozym cELISA) kits compared with the reference MNT test on 428 cattle samples

	ID Screen® cELISA					Immunozym cELISA
Cutoff	50		86			63		62
	positive	negative	positive	negative		positive	negative	positive	negative
MNT positive	31	170	130	71		151	50	156	45
MNT negative	2	225	56	171		22	205	22	205
Se (%)	15.4		64.5			75.1		78.1
Sp (%)	99.1		75.3			90.3		90.3
ƙ	0.11		0.40			0.68		0.68
AUC (%)	78					89

Cutoffs 50 and 63: doubtful thresholds recommended by the manufacturers; cutoffs 86 and 62: optimal positive thresholds weighting sensitivity and specificity