Decline of General Intelligence in Children Exposed to Manganese from Mining Contamination in Puyango River Basin, Southern Ecuador
Decline of General Intelligence in Children Exposed to Manganese from Mining Contamination in Puyango River Basin, Southern Ecuador
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DOI：
10.1007/s10393-015-1027-2
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发表时间：
2015-09-01
期刊：
影响因子：
2.5
通讯作者：
Mendez, Ignacio
中科院分区：
文献类型：
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作者：
Betancourt, Oscar;Tapia, Marlene;Mendez, Ignacio
基于生态系统方法的健康（生态健康），本研究旨在确定神经行为障碍的儿童暴露于几个层次的有毒金属污染的金矿开采在Puyango河流域，厄瓜多尔南部。93名出生或生活在研究地区的儿童参加了这项研究。一个神经行为测试电池包括12个测试评估神经系统的各种功能，以及一份调查问卷，关于事件的暴露儿童的母亲在围产期期间的污染物。从儿童身上采集头发样本，以确定锰浓度。描述性和推理性统计，以检查暴露事件，头发锰和神经行为障碍之间可能存在的关系。在控制了年龄和教育水平等协变量后，发现头发锰水平升高（超过2 μ g/g）的儿童在一般智力测试（瑞文渐进式颜色矩阵量表PCM）中表现不佳。生态健康方法有助于确定Puyango盆地下游河水中锰含量非常高（970微克/升）的儿童是头发锰含量最高和智力测试成绩最差的儿童。
Based on ecosystem approaches to health (Ecohealth), this study sought to identify neurobehavioral disorders in children exposed to several levels of toxic metal pollution from gold mining in the Puyango River Basin, Southern Ecuador. Ninety-three children born or living in the study area participated in the study. A neurobehavioral test battery consisting of 12 tests assessing various functions of the nervous system was applied as well as a questionnaire regarding events of exposure of children's mothers to contaminants during perinatal period. Hair samples were taken from children to determine manganese concentrations. Descriptive and inferential statistics were applied in order to examine possible relationships between exposure events, hair manganese, and neurobehavioral disorders. Having controlled co-variables such as age and educational level, it was found that children with elevated levels of hair manganese (over 2 mu g/g) had poor performance in the test of general intelligence (Raven's Progressive Color Matrices Scale PCM). The Ecohealth approach helped to identify that children in the lower Puyango Basin with very elevated levels of manganese in the river water (970 mu g/L) are the ones who have the highest levels of hair manganese and the worst performance in the intelligence test.