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Table 1 The clinical features of the six infants with congenital syphilis and corresponding mothers

From: TPPA titer as a new adaptation for early diagnosis of congenital syphilis: a retrospective analysis of observation over three years in Yunnan, China

Number At birth TRUST titer TPPA titer TRUST seroreversion time (M)
Gestational age (W) Weight (kg) Infant Mother Infant Mother
1a NA NA NA (0 Y)/1:64 (4 years)b NA NA (0 Y)/1:1280 (4 years) NA Nonec
2 38 3.14 1:1 (0 Y)/1:1 (1.5  years) 1:1 1:1280 (0 Y)/1:160 (1.5 years) 1:1280 30
3 32 1.83 1:8 (0 Y)/1:4 (4 years) 1:2 1:1280 (0 Y)/1:1280 (4 years) 1:1280 None
4 36 2.60 1:1 (0 Y)/− (11 years) 1:1 1:1280 (0 Y)/1:1280 (11 years) 1:1280 19
5 39 3.06 1:2 (0 Y)/− (4 years) 1:1 1:1280 (0 Y)/1:160 (4 years) 1:1280 6
6 38 2.92 1:8 (0 Y)/1:4 (5 years) 1:1 1:1280 (0 Y)/1:1280 (5 years) 1:1280 None
  1. NA: not available; W: week(s); M: month(s); −: negative
  2. aThis infant is an adopted child, the information of the natural mother is not clear
  3. b0 Y indicates the time of the infant at birth
  4. cNone means there is no seroreversion observed in the child