Lead exposure among mothers and their newborns in Toronto

摘要: Recent studies have suggested that a fetal blood lead level of 0.48 mumol/L (much lower than 1.21 mumol/L, which is the previously believed to be toxic developing brain) may impair brain development permanently. We measured maternal and umbilical cord levels free erythrocyte protoporphyrin (FEP) among 95 consecutive mother-infant pairs determine whether neonates in Toronto are high-risk group. There was significant correlation between (r = 0.59, p less 0.0001). Most (99%) infants had below 0.34 mumol/L; 11 cases were detection limit 0.01 mumol/L. The FEP higher levels. US Centers for Disease Control, Atlanta, currently finds acceptable 0.62 children up 10 years age; however, this not applicable newborns since their apparently reflect immature heme synthesis increased volume rather poisoning. Our data suggest living does impose teratogenic risk from intrauterine exposure lead; residents areas should followed up.