1. WHO . Soil-transmitted helminthic infections. Geneva: World Health Organization; 2015. http://www.who.int/mediacentre/factsheets/fs366/en/ [accessed 1 October 2015].
2. CDC . Parasites-Schistosomiasis. Atlanta : Centers for Disease Control and Prevention; 2012. http://www.cdc.gov/parasites/schistosomiasis/gen_info/faqs.html [accessed 1 October 2015].
3. Water, sanitation and hygiene for the prevention of diarrhoea
4. Joint Monitoring Programme . Progress on Drinking Water and Sanitation: 2015 Update. Geneva: WHO/UNICEF; 2015.
5. UN Open Working Group on Sustainable Development Goals . Goal 6. Ensure availability and sustainable management of water and sanitation for all. New York: United Nations; 2014. http://una-gp.org/clancyt/files/goals/goal6.pdf [accessed 1 November 2016].