Abstract
After previously excluding iodine and lead as confounding factors, the aim of the present study, conducted in June 2013, was to consider whether arsenic was a confounding factor in the studies of children’s intelligence in Wamiao and Xinhuai. Fluoride and arsenic levels were measured in water samples from the 37 household shallow wells still in use for providing water for washing but not drinking, 17 in Wamiao and 20 in Xinhuai. The fluoride levels in the household shallow wells in Wamiao (2.28±0.44 mg/L, range: 1.66–3.18 mg/L) were significantly higher than those in Xinhuai (0.38±0.21 mg/L, range: 0.15–0.77 mg/L) (t=17.08, p=0.000). In contrast, the levels of arsenic in Xinhuai (16.40±19.11 ug/L, range: 0–48.50 ug/L) were significantly higher than those in Wamiao (0.24±0.26 ug/L, range: 0–0.50 ug/L) (t=3.48, p=0.001). In our 2003 study, in high-fluoride Wamiao (mean drinking water F=2.47 mg/L) the average IQ was 8.4 points lower (92.02 vs. 100.41) than in the low-fluoride Xinhuai (mean drinking water F=0.36 mg/L). These results make it very unlikely that the differences in IQ of the children living in Wamiao and Xinhuai are the result of differences in exposure to arsenic rather than to fluoride.
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A Systems Approach to Remediating Human Exposure to Arsenic and Fluoride From Overexploited Aquifers.
Key Points Overexploiting aquifers increases energy costs and lowers economic productivity by increasing human exposure to geogenic neurotoxins Over a 100 year future time-frame estimated revenue from agro-export will be less than the costs this activity imposes on the population Investing in water treatment substantially lowers costs of deteriorating water quality In
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WITHDRAWN: Co-exposure effects of arsenic and fluoride on intelligence and oxidative stress in school-aged children: a cohort study.
This article has been withdrawn at the request of the editor. The Publisher apologizes for any inconvenience this may cause. as of November 6, 2020 Highlights Pioneer biomonitoring study on rural children to address As and F- co-exposure. High dental Fluorosis found in relation to urinary As and F- levels in
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Influence of fluoride exposure on reaction time and visuospatial organization in children
Note: This is a conference abstract from the 2000 Annual Conference of the ISEE (International Society for Environmental Epidemiology). No full study has been published. Fluoride exposure is an important public health problem in several Mexican states. In the city of San Luis Potosi, Mexico, above 90% of the children have
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The effect of high levels of arsenic and fluoride on the development of children’s intelligence.
In the fields of toxicology, histology, physiology and biochemistry, numerous research and reports have already been conducted on the poisonous effect of arsenic poisoning, fluoride poisoning, as well as the combined effect of arsenic and fluoride poisoning. Progress has been made likewise in relevant medical treatment, clinical diagnosis and water clean-up prevention
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Decreased intelligence in children and exposure to fluoride and arsenic in drinking water.
Recent evidence suggests that fluoride (F) and arsenic (As) may adversely affect intelligence quotient (IQ) scores. We explore the association between exposure to F and As in drinking water and intelligence in children. Three rural communities in Mexico with contrasting levels of F and As in drinking water were studied:
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