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Table 2 Data of individuals with three detected infections

From: Sequential dengue virus infections detected in active and passive surveillance programs in Thailand, 1994–2010

   Age at infection Serotypea Serologic responseb Clinical categoryc
  Infection order 1 2 3 1 2 3 1 2 3 1 2 3
Indiv. Titers > 10d             
1 0 8.7 12.8 14.9 ND NEG DEN4 ND S S SubC/nhDF DHF DHF
2 0 8.9 10.9 12.2 ND ND ND ND ND ND SubC SubC SubC
3 ND 10.5 10.8 10.9 NEG DEN1 NEG S S S nhDF/hDF hDF hDF
4 0 7.7 8.7 11.0 ND ND DEN2 ND ND S SubC/nhDF SubC/nhDF nhDF
5 4 7.5 8.5 10.5 ND ND ND ND ND ND SubC SubC SubC
6 0 7.9 9.2 12.2 ND ND ND ND ND ND SubC/nhDF SubC SubC
7 0 7.9 9.4 12.8 DEN1 NEG ND S S ND DHF nhDF SubC
8 4 9.0 12.3 12.9 ND ND DEN2 ND ND S SubC SubC DHF
9 ND 5.9 9.3 10.2 NEG ND ND S ND ND DHF SubC SubC
10 4 7.8 9.0 10.3 ND ND ND ND ND ND SubC/nhDF SubC SubC
11 ND 9.1 11.1 11.8 DEN1 DEN3 ND S S ND hDF nhDF SubC/nhDF
12 0 7.8 10.8 12.3 ND ND ND ND ND ND SubC/nhDF SubC/nhDF SubC
13 0 7.8 8.8 10.1 ND ND DEN2 ND ND S SubC/nhDF SubC/nhDF nhDF
14 ND 5.3 8.7 9.8 NEG DEN2 ND S S ND DHF nhDF SubC
  1. aDengue virus (DENV) serotype detected by RT-PCR or viral culture. NEG = no virus detected. ND = RT-PCR not performed (no symptomatic infection occurred).
  2. bS = secondary response. ND = not determined (no symptomatic infection occurred).
  3. cSubC = subclinical DENV infection (captured by four-fold rise in dengue hemagglutination inhibition (HAI) titers without identified acute symptomatic DENV infection); SubC/nhDF = subclinical/non-hospitalized dengue fever (DF) (infections captured by four-fold rise in HAI titers outside the active study surveillance period; see Methods for detailed explanation); nhDF = non-hospitalized DF; hDF = hospitalized DF.
  4. dNumber of DENV serotypes with HAI titer >10 prior to infection one.