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Table 2 Organochlorine concentrations in mother's serum lipids in late pregnancy and infant exposure from mother's milka

From: Immune cell counts and risks of respiratory infections among infants exposed pre- and postnatally to organochlorine compounds: a prospective study

Exposure Study groups   
Serumb Infections White blood cells Lymphocyte subsets
CB 28+52+101 4 (3–427) 4 (3–427) 4 (3–19)
CB-153 60 (23–179) 57 (23–158) 59 (23–158)
Di-ortho PCB 131 (44–362) 127 (44–342) 129 (44–342)
Mono-ortho PCB TEQ 4 (1–20) 4 (1–11) 4 (1–9)
p,p'-DDE 88 (21–622) 85 (24–622) 83 (29–622)
Mother's milk exposurec    
CB 28+52+101 8 (0–155) 8 (0–76) 9 (0–39)
CB-153 187 (0–853) 174 (0–396) 186 (0–396)
Di-ortho PCB 364 (0–1666) 351 (0–830) 372 (0–830)
Mono-ortho PCB TEQ 11 (0–54) 11 (0–26) 11 (0–26)
p,p'-DDE 311 (0–2199) 289 (0–2199) 306 (0–2199)
  1. aMedian (range). Di-ortho PCB = CB-138, CB-153, CB-180; Mono-ortho PCB TEQ = CB-105, CB-118, CB-156, CB-167 [32]. The study group "Infections" consists of all study participants (prenatal exposure N = 190; postnatal exposure N = 175), the "White blood cells" group is a subgroup of infants among the study participants which had their WBC counts analyzed (N = 86), and within this subgroup lymphocyte subsets were analyzed in the "Lymphocyte" group composed of infants with enough blood left after WBC count analysis (N = 52).
  2. bng/g lipid. Mono-ortho PCBs: pg TEQ/g lipid [32]. Serum sampled week 32–34.
  3. cng/g fresh weight*days. Mono-ortho PCBs: pg TEQ/g fresh weight*days. Calculated as organochlorine concentration in mother's milk on a fresh weight basis*days of nursing*(%of full nursing/100).