Genomic and metagenomic analysis of microbes and microbial communities involved in biogeochemical cycling of arsemic

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Arsenic contamination of drinking water is a global problem causing chronic health problems in affected populations. Symptoms range from skin discolouration, nausea, diarrhoea and vascular problems to cancer. In countries such as Bangladesh it is estimated that over 30 million people are exposed to high levels of arsenic, and localised areas with high arsenic levels have been found in Canada, the USA and throughout the world. Methods have been developed to remove arsenic-containing compounds from drinking water supplies, but these are limited by cost especially in developing countries.