TABLE 2.

Serological test results

Case identifier	ELISA result	ELISA ratio	IFA result	IFA titer	PRNT50 titer
CW1a	Borderline	0.93	Positive	32	67.74
CW4a	Borderline	0.80	Positive	100	116.32
CW5a	Negative	0.14	Positive	32	58.56
CW7a	Borderline	0.89	Positive	32	91.26
CW10a	Negative	0.21	Borderline	10	23.46
CW15a	Borderline	0.82	Positive	32	51.69
CW16a	Borderline	0.90	Borderline	10	32.49
CW19a	Negative	0.53	Negative	<1:10	27.51
CW21a	Positive	1.60	Positive	32	60.21
CW23a	Negative	0.20	Positive	100	145.20
CW24a	Negative	0.21	Negative	<1:10	99.87
CW26a	Borderline	0.85	Borderline	10	30.10
CW27a	Borderline	0.86	Positive	32	51.69
CW28a	Positive	3.53	Borderline	10	31.82
CW30a	Borderline	0.83	Positive	32	83.40
CW13b	Positive	1.34	Borderline	10	<20
CW2c	Negative	0.20	Negative	<1:10	<20
CW3c	Negative	0.17	Negative	<1:10	<20
CW8c	Negative	0.23	Negative	<1:10	<20
CW9c	Negative	0.20	Negative	<1:10	<20
CW11c	Negative	0.30	Negative	<1:10	<20
CW12c	Negative	0.26	Negative	<1:10	<20
CW14c	Negative	0.28	Negative	<1:10	<20
CW17c	Negative	0.32	Negative	<1:10	<20
CW18c	Negative	0.53	Negative	<1:10	<20
CW20c	Negative	0.35	Negative	<1:10	<20
CW22c	Negative	0.25	Negative	<1:10	<20
CW25c	Negative	0.21	Negative	<1:10	<20
CW29c	Negative	0.17	Negative	<1:10	<20
CW31c	Negative	0.18	Negative	<1:10	<20
HD1-30d	Negative	0.13–0.18	NDe	ND	<20

^aPRNT₅₀ positive.

^bELISA-positive PRNT50 negative.

^cELISA negative, PRNT50 negative.

^dKSA healthy donors.

^eND, not determined.