Instituto de Estudos em Saúde Coletiva, Universidade Federal do Rio de Janeiro, Brasil.
Cad Saude Publica. 2012 Aug;28(8):1539-45. doi: 10.1590/s0102-311x2012000800012.
This study was a longitudinal assessment of mercury exposure in schoolchildren in an urban area of the Brazilian Amazon. The study population consisted of 90 children whose exposure levels were assessed by testing mercury levels in the umbilical cord blood and mothers' blood samples in 2000-2001, and in the children's hair and blood samples. The study also used a questionnaire on demographic and socioeconomic data, fish consumption, and self-reported disease history. Mean mercury level in hair in 2010 was approximately 1 µg/g, ranging up to 8.22 µg/g, similar to 2004 and 2006. These figures can be explained by low fish consumption. Mean blood mercury levels at birth exceeded 10 µg/L, ranging up to nearly 60 µg/L, which indicates mercury transfer across the placenta. There was a significant increase in blood mercury from 2004 to 2006 (p < 0.001), suggesting exposure through air pollution. The main exposure to mercury was during pregnancy.
这项研究是对巴西亚马逊地区城市儿童汞暴露情况的纵向评估。研究人群包括 90 名儿童，他们的汞暴露水平通过检测 2000-2001 年脐带血和母亲血液样本以及儿童头发和血液样本中的汞含量来评估。该研究还使用了一份关于人口统计学和社会经济数据、鱼类消费和自报疾病史的问卷。2010 年头发中的平均汞含量约为 1µg/g，最高可达 8.22µg/g，与 2004 年和 2006 年相似。这些数字可以用低鱼类消费来解释。出生时血液中的平均汞含量超过 10µg/L，最高可达近 60µg/L，这表明汞通过胎盘转移。2004 年至 2006 年间血液中的汞含量显著增加（p<0.001），这表明是通过空气污染暴露所致。主要的汞暴露是在怀孕期间。
