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Table 1 Pre-existing PRNT50 titer and subsequent dengue infection in subjects with low 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
03-146 <10 <10 <10 <10 155 11/10/2006 DF Secondary D1
05-119 <10 <10 <10 <10 235 9/6/2006 Pharyngitis Secondary D1
05-181 <10 <10 <10 <10 <10 21/8/2006 DF Primary D1
05-310 10 <10 167 <10 250 21/4/2006 DF Secondary D1
07-479 <10 <10 <10 <10 29 23/7/2006 DF Secondary D1
07-383 13 <10 <10 <10 <10 10/9/2006 DF Primary D1
04-276 13 <10 <10 <10 <10 13/3/2006 DF Primary D1
05-357 40 29 27 <10 303 10/10/2006 Bronchitis Secondary D1
05-002 50 <10 <10 <10 396 25/11/2006 DF Secondary D1
03-097 75 1134 24 20 1307 7/10/2006 DF Secondary D1
05-339 <10 <10 <10 <10 503 28/8/2006 Pharyngitis Secondary D2
04-322 17 <10 <10 <10 165 9/11/2006 DF Secondary D3
04-325 <10 <10 <10 <10 685 23/10/2006 DHF gr2 Secondary D3
02-189 <10 10 12 <10 <10 6/7/2006 DF Primary D3
01-227 49 <10 <10 <10 590 19/2/2006 Pharyngitis Secondary D4
01-254 12450 3348 32 <10 78 28/2/2006 AGE Secondary D4
01-384 <10 <10 <10 <10 92 19/12/2006 Pharyngitis Secondary D4
06-164 210 540 12040 21 76 30/8/2006 DF Secondary D4
01-124 228 135 516 39 28 31/3/2006 DF Secondary D4
05-257 3141 194 272 41 726 15/10/2006 Common cold Secondary D4
01-224 195 2901 220 50 802 9/3/2006 DHF gr1 Secondary D4
05-378 6238 2204 676 75 43 28/7/2006 DF Secondary D4
  1. aELISA result showed either primary or secondary infection.
  2. AGE: acute gastroenteritis; D: dengue virus; DF: dengue fever; DHF: dengue hemorrhagic fever; gr: grade; JE: Japanese encephalitis virus; PRNT50: 50% plaque reduction neutralization.