Legionella may contaminate and grow in other water systems such as hot and cold-water services.
They survive in low temperatures and thrive at temperatures between 20 degrees centigrade, and 45 degrees centigrade if the conditions are right, e.g. if a supply of nutrients is present such as rust, sludge, scale, algae and other bacteria.
Because high temperatures kills them, for building code compliance water has to be stored at temperatures greater than 60 degrees centigrade (irrespective of whether a mixing device is installed) and delivered at not more than 45 degrees centigrade in elderly people's homes, early childhood centres, etc and not more than 55 degrees centigrade for other building uses, including housing.
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LEGIONELLA MANAGEMENT SPECIALIST
Why do you need a Legionella assessment?
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What is Legionnaires disease?
Legionnaire's disease is an infection caused by the exposure to legionella bacteria.
Legionella bacteria are very common in our environment at low levels, and can be found in rivers, ponds and soil. Air conditioning cooling towers and warm water systems can provide a warm, supportive environment conductive to growth well beyond normal environmental levels. The presence of other water based organism, such as amoeba, algae and other bacteria within these environments can provide greater nutrient levels further enhancing growth of Legionella.
Legionella disease is a type of pneumonia caused by Legionella pneumophila, one of 39 species of Legionella bacteria. It takes between two to ten days for symptoms to appear. Symptoms include malaise, headaches, chills, and rapid onset of high fever, coughs and other influenza-like symptoms. Legionnaires disease can develop into a life threatening condition.
Pontiac fever, also caused by legionella bacteria is a milder, non-pneumonic disease which is considered non-life threatening. Symptoms are similar to influenza and recovery usually occurs within two to five days.