Plaque reduction neutralization antibody test does not accurately predict protection against dengue infection in Ratchaburi cohort, Thailand

Table 3 Pre-existing PRNT50 titer and subsequent dengue infection among subjects whose subsequent infecting serotypes could not be identified

Subject code	PRNT50 titer (Feb 2006)					Date of illness	Clinical diagnosis	ELISA test result^a
Subject code	D1	D2	D3	D4	JE	Date of illness	Clinical diagnosis	ELISA test result^a
01-177	537	218	619	74	14	1/6/2006	Pharyngitis	Secondary
01-437	473	297	1283	<10	75	9/9/2006	Influenza	Secondary
01-456	14105	2851	7872	235	594	27/6/2006	DF	Secondary
01-559	393	1606	249	65	4987	14/8/2006	viral infection	Secondary
02-246	<10	<10	16	<10	2201	3/5/2006	DF	Secondary
02-434	<10	<10	<10	<10	1326	31/3/2006	Pharyngitis	Secondary
02-453	172	2053	126	53	14587	10/3/2006	DHF gr3	Secondary
03-021	867	<10	1026	<10	<10	29/11/2006	DHF gr1	Secondary
05-072	351	36	<10	174	140	1/12/2006	Viral infection	Secondary
05-0112	<10	<10	<10	<10	<10	2/12/2006	URI	Primary
05-209	310	48	753	14	76	29/7/2006	DHF gr1	Secondary
05-239	3257	8199	111	40	919	24/4/2006	DHF gr1	Secondary
05-358	249	247	3934	34	267	10/6/2006	Viral infection	Secondary
06-070	236	2687	10649	<10	94	16/6/2006	Pharyngitis	Secondary
06-124	472	5074	3943	29	164	27/8/2006	DHF gr1	Secondary
06-192	10	<10	<10	<10	42	26/8/2006	Pharyngitis	Secondary
07-310	137	43	23	198	21	7/8/2006	Influenza	Secondary

^aThe ELISA result showed either primary or secondary infection.
D: dengue virus; DF: dengue fever; DHF: dengue hemorrhagic fever; gr: grade; JE: Japanese encephalitis virus; PRNT50: 50% plaque reduction neutralization.

ISSN: 1743-422X