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 Health  Vol.9 No.6 , June 2017
Alluvial Gold Mining Sites as Exposure Pathways for Methyl Mercury Toxicity in Children: A Systematic Review
Abstract:
Extensive studies have showed that alluvial gold mining is a predisposing factor for mercury toxicity through occupational exposure. In our systematic review of related literature, we aim to determine if children of alluvial gold miners were at risk of exposure to methyl mercury toxicity through dietary exposure. This was achieved through applying Cochrane PICO methodology for the research question. We selected only the most relevant articles from the thousands of articles that were generated by the Divine Word University (DWU) electronic data base system for our review. Further screening questions were applied based on the CASP method which filtered remaining 105 to only 9 papers for the review. The results from the nine (N = 9) studies analysed showed convincing results of the association between consumption of fish contaminated with methyl mercury and poor growth and development in children whose parents lived near mining sites. We conclude that since mercury is the predominant element used in the extraction of gold in alluvial mining, it is an exposure pathway for methyl mercury toxicity for children through dietary exposure.
Cite this paper: Begani, R. and Begani, A. (2017) Alluvial Gold Mining Sites as Exposure Pathways for Methyl Mercury Toxicity in Children: A Systematic Review. Health, 9, 930-941. doi: 10.4236/health.2017.96066.
References

[1]   Aryee, B.N.A., Ntibery, B.K. and Atorkui, E (2003). Trends in the Small-Scale Mining of Precious Metals in Ghana: A Perspective on Its Environmental Impacts. Journal of Clear Production, 11, 131-140.
https://doi.org/10.1016/S0959-6526(02)00043-4

[2]   Moretti, D. (2007) Artisanal and Small Scale-Mining in Asia Pacific. Case Study Series.

[3]   Ouboter, P.E., Landburg, G.A., Quik, J.H.M., Mol, J.H.A. and van der Lugt, F. (2012) Mercury Levels in Pristine and Gold Mining Impacted Aquatic Ecosystems Suriname, South America. Royal Swedish Academy of Sciences, 41, 873-882.
https://doi.org/10.1007/s13280-012-0299-9

[4]   Reto, C. (2002) Possible Mercury Poisoning in Alluvial Gold Miners in the Pogera Valley, Papua New Guinea. Journal of Rural and Remote Environmental Health, 1, 10-12.

[5]   Grandjean, P., White, R.F., Nielsen, A., Cleary, D. and de Oliveira Santos E.C. (1999) Methyl Mercury Neurotoxicity in Amazonian Children Downstream from Gold Mining. Environmental Health Perspectives, 107, 587-591.
https://doi.org/10.1289/ehp.99107587

[6]   Charles, E., Thomas, D.S.K., Dewey, D., Davey, M., Ngallaba, S.E. and Evelin, K. (2013) A Cross-Sectional Survey on Knowledge and Perceptions of Health Risks Associated with Arsenic and Mercury Contamination from Artisanal Gold Mining in Tanzania. BMC Public Health, 13, 1-8.
https://doi.org/10.1186/1471-2458-13-74

[7]   Oken Emily, Wright, O.R., Kleinman, K.P., Bellinger, D., Amarasiriwardena, J.C., Hu, H., Rich-Edwards, J.W. and Gillman, M.W. (2005) Maternal Fish Consumption, Hair Mercury, and Infant Cognition in a U.S. Cohort. Environmental Health Perspectives, 113, 1376-1380.
https://doi.org/10.1289/ehp.8041

[8]   Gibb, H. and O’Leary, K.G. (2014) Mercury Exposure and Health Impacts among Individuals in the Artisanal and Small-Scale Gold Mining Community: A Comprehensive Review. Environmental Health Perspectives, 122, 667-672.
https://doi.org/10.1289/ehp.1307864

[9]   Konig, A., Bouzan, C., Cohen, J.T., Connor, W.E., Kris-Etherton, P.M., Gray, G.M., Lawrence, R.S., Sawizt, D.A., and Teutsch, S.M. (2005) A Quantitative Analysis Fish Consumption and Coronary Heart Disease Mortality. American Journal of Preventative Medicine, 29, 335-345.
https://doi.org/10.1016/j.amepre.2005.07.001

[10]   McDowell, M.A., Dillon, C.F., Osterloh, J., Bolger, P.M., Pellizzari, E., Fernando, R., de Oca, R.M., Schober, S.E., Sinks, T., Jones, R.L. and Mahaffey K.R. (2004) Hair Mercury Levels in U.S. Children and Women of Childbearing Age: Reference Range Data from NHANES 1999-2000. Environmental Health Perspectives, 112, 1165-1171.
https://doi.org/10.1289/ehp.7046

[11]   Davidson, P.W., et al. (1998) Effects of Prenatal and Postnatal Methylmercury Exposure from Fish Consumption on Neurodevelopment: Outcomes at 66 Months of Age in the Seychelles Child Development Study. The Journal of the American Medical Association, 280, 701-707.
https://doi.org/10.1001/jama.280.8.701

[12]   Lederman, S.A., Jones, R.L., Caldwell, K.L., Rauh, V., Sheets, S.E, Tang, D.L., Viswanathan, S., Becker, M., Stein, J.L., Wang, R.Y. and Perera, F.P. (2008) Relation between Cord Blood Mercury Levels and Early Child Development in a World Trade Center Cohort. Environmental Health Perspectives, 116, 1085-1091.
https://doi.org/10.1289/ehp.10831

[13]   Yorifuji, T., Tsuda, T., Inoue, S., Takao, S. and Harada, M. (2011) Long-Term Exposure to Methyl Mercury and Psychiatric Symptoms in Residents of Minamata, Japan. Environment International, 37, 907-913.
https://doi.org/10.1016/j.envint.2011.03.008

[14]   World Health Organization (2008) Guidance for Identifying Populations at Risk from Mercury Exposure.
http://www.who.int/foodsafety/publications/chem/mercuryexposure.pdf

 
 
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