TABLE 1.

Sensitivities, specificities, PPVs, NPVs, and kappa indexes calculated according to PCR results and serological tests (IIF and ELISA) with TESA-blot as the gold standard

Comparison	% Sensitivity	% Specificity	% PPV	% NPV	Kappa indexc
IIF vs TESA	100	100	100	100	1
ELISA vs TESA-blota	95	100	95	70	0.8
ELISA vs TESA-blotb	100	100	100	100	1
stDNA PCR vs TESA-blot	75	100	100	27	0.3
kDNA PCR vs TESA-blot	70	100	100	24	0.2

^aValues calculated without the results of corrected discrepant samples.

^bValues calculated with the results of corrected discrepant samples.

^cLess than 0.40, poor agreement; 0.40 to 0.60, fair agreement; 0 61 to 0.80, good agreement; more than 0.80, excellent agreement.