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

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
D1 D2 D3 D4 JE
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
  1. aThe ELISA result showed either primary or secondary infection.
  2. D: dengue virus; DF: dengue fever; DHF: dengue hemorrhagic fever; gr: grade; JE: Japanese encephalitis virus; PRNT50: 50% plaque reduction neutralization.