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Waterborne Illnesses Waterborne Illnesses • Has anyone ever been • restricted from drinking tap water? Traveling? At home? Is waterborne illness a big problem in Canada? Is waterborne illness a big problem in Canada? • May 2000 • Walkerton, Ontario • 7 people die & more • than 2,000 fall ill E.coli had contaminated the water system – From farm runoff Waterborne Illnesses • Contamination of water • • supplies & ground water often causes a boil order to be issued for surrounding areas Since 2000 Halifax has begun to test for lead in the drinking water on a regular basis The plumbing in some older homes consists of lead pipes Is Waterborne illness a big problem in other countries in the world? • 25,000 people die everyday around the world because of water related diseases & illnesses Why is waterborne illness less of a problem in Canada? • Access to clean groundwater • Infrastructure & treatment facilities to purify water • Government regulations on water quality • Access to bottled water, if necessary Where does our water come from? • Halifax Regional Water Commission: – Pockwock Lake, west of Halifax, is the source of supply for Halifax, Bedford, Sackville and surrounding areas. – Lake Major, near Cherry Brook, is the soure of supply for Dartmouth, Cole Harbour, Eastern Passage and surrounding areas • Wells – Use groundwater from dug or drilled wells. – Approx. 46% of Nova Scotians rely on wells Where does water come from in LDC Countries? • Rivers and lakes • Rain water • Bore holes and pumps • wells How could water related diseases be prevented in LDC countries? • Boiling • Filtering • Chemicals (chlorine or iodine tablets) • Fencing off water source to prevent animal contamination • Water source farther from human settlement (to prevent human contamination) • Shipment in of bottled water (from organizations like the Red Cross & UNICEF) “Safe Water for All: A story of sustainable community development” • Watch film • Use information from • film to complete accompanying activity Note: How has access to clean water helped the village become more sustainable? Waterborne Illness Definitions • Amoebic Dysentery/ Dysentery: – An inflammatory disorder of the lower intestinal tract – Usually caused by a bacterial, parasitic, or protozoan infection – Resulting in pain, fever & severe diarrhea, often accompanied by the passage of blood & mucus Waterborne Illness Definitions • Guinea Worm: – A painful & debilitating infestation – Contracted by drinking stagnant water contaminated with guinea worm larvae – Larvae mature inside the human body and burst out through a painful blister – Blisters often contract secondary infection Waterborne Illness Definitions • Cholera: – An infection of the small intestine – Caused by the bacterium Vibrio cholerae – Causes severe diarrhea, abdominal cramps, nausea & often dehydration Waterborne Illness Definitions • Tetanus: – Caused by the bacterium Clostridium tetani – Produces painful, rigid muscle contractions, especially in the neck & jaw – Immunization can prevent the disease Waterborne Illness Definitions • Schistosomiasis/ Bilharzia: – Tropical disease spread by pararsitic trematode worms (blood flukes) living in fresh water – Worms can live in a person & lay thousands of eggs over several years – Causes a rash/itchy skin, fever, chills, muscle aches, & possible damage to the liver, intestines, lungs & bladder Waterborne Illness Definitions • Malaria: – An infectious disease characterized by cycles of chills, fever, & sweating – Caused by the parasitic infection of red blood cells by a protozoan – Transmitted by the bite of an infected mosquito Waterborne Illness Case Studies Works Cited • Dana, Douglas, and Debby Golonka. "Lead Poisoning." HealthLink BC Home Page. Healthwise Inc., 29 Aug. 2008. Web. <http://www.healthlinkbc.ca/kbase/topic/major/hw1 19898/descrip.htm>. 03 Dec. 2009. • Saccossio, Sabrina. "CBC News In Depth: Tap water." CBC.ca - Canadian News Sports Entertainment Kids Docs Radio TV. Canadian Boardcasting Corporation, 11 June 2007. Web. <http://www.cbc.ca/news/background/water/leadpipes.html>. 04 Dec. 2009.