Water Conditioning & Purification Magazine

Legionella pneumophila

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A water-borne pathogenic bacterium which causes Legionnaires’ Disease; may be present in cooling systems and spread by droplets; controlled by chlorination, ozone, silver-copper, ultraviolet light. A series of bacteria, including Legionella pneumophila, which can cause pneumonia-like illness called Legionnaires disease after the American Legion convention in Philadelphia where the disease first drew attention. These bacteria have been found growing in hard water scale and thrive below 140 degrees Fahrenheit in water heaters, showers, humidifiers, etc. Infection is obtained by inhalation.

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