Table 1. Diagnostic accuracy of L3-CTAB and L3-SSE from infective larvae of S. venezuelensis .

Diagnostic parameters	L3-CTAB			L3-SSE
Cut-off	1	2	3	1	2	3
OD (450 nm)	0.214	0.286	0.589	0.083	0.365	0.458
% Sensitivity	100	95	70	100	92.5	77.5
% Specificity	90.11	97.8	100	15.38	94.51	100
Likelihood ratio	10.11	43.22	∞	1.18	16.83	∞
% Positive predictive value	81.63	95	100	34.19	88.10	100
% Negative predictive value	100	97.8	88.35	100	96.63	91
Diagnostic accuracy	0.93	0.97	0.91	0.41	0.94	0.93
% Cross-reactivity	11.63	2.33	0	79.07	9.30	0

L3-CTAB = Surface cuticle antigens from infective larvae of S. venezuelensis extracted with CTAB detergent; L3-SSE = Soluble somatic extract from infective larvae of S. venezuelensis; ∞ = undefined.