TABLE I. Results of immunochromatography (IC) with whole blood vs conventional serology (CS).

		CS
		Positive	Negative	Total
IC on whole blood	Positive	62	2	64
	Negative	9	168	177
	Total	71	170	241

negative predictive value: 95.9%; positive predictive value: 96.9%; sensitivity: 87.3%; specificity: 98.8%.