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Table 2 Pre-existing PRNT50 titer and subsequent dengue infection in subjects with high titer (>90) to subsequent infecting serotype

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

Subject code PRNT50 titer (Feb 2006) Date of illness Clinical diagnosis ELISA test resulta Serotype isolated
D1 D2 D3 D4 JE
06-043 121 224 83 <10 11 14/8/2006 DF Secondary D1
05-021 133 <10 <10 <10 72 26/4/2006 DF Secondary D1
05-074 173 1136 73 31 503 9/5/2006 DF Secondary D1
06-082 317 <10 18 <10 760 14/6/2006 Viral infection Secondary D1
01-286 581 <10 <10 <10 <10 19/4/2006 DF Secondary D1
01-141 1848 821 4521 328 738 6/11/2006 Pharyngitis Secondary D1
07-119 5291 84 332 98 207 28/7/2006 DF Secondary D4
05-244 4916 1305 1006 145 393 21/9/2006 DF Secondary D4
04-378 11682 853 417 261 5615 5/7/2006 DF Secondary D4
  1. aELISA result showed either primary or secondary infection.
  2. D: dengue virus; DF: dengue fever; JE: Japanese encephalitis virus; PRNT50: 50% plaque reduction neutralization.