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Causes of Legionnaire's disease原因军团病

Legionella bacteria are found naturally in the environment and thrive in warm water and warm damp places.军团菌是在环境中自然存在和蓬勃发展，在温水和温暖潮湿的地方。 They live in fresh water of streams, lakes and thermal springs, moist soil, and mud.他们住在淡水的河流，湖泊和热泉水，潮湿的土壤，泥浆。 It can grow inside layers of slime in pipes, and on plants and rocks.它可以成长层内煤泥在管道，和对植物和岩石。 It has great powers of survival.有很大的权力，生存的问题。 In their normal environment Legionella bacteria probably do not cause infections but man-made water systems sometimes provide environments that let Legionella bacteria increase to large numbers causing outbreaks.在正常的环境军团菌，可能不会造成感染，但人为制造的用水系统有时提供的环境，让军团菌增加，大量造成的爆发。

These man-made systems include cooling towers associated with air conditioning and industrial cooling processes, showers or spa pools.这些人为制造的系统包括冷却塔与空调及工业冷却过程中，淋浴或水疗池。 Legionella bacteria tend to grow in large, warm, moist areas such as air‑conditioning towers.军团菌往往成长在很大程度上，温暖，潮湿的地区，例如空气调节水塔。 They are spread into the air in water droplets.他们是蔓延到空气中的水滴。 The bacteria prefer temperatures of 20 to 45 °C.细菌喜欢的温度20至45 ° C时â Known sources therefore include:已知的来源，因此，包括：

  • Re-circulating water in air-conditioning and cooling systems,重新循环水在空气调节和冷却系统，
  • Whirlpool spas and other warm-water baths,旋流温泉及其它温水澡，
  • Decorative fountains,装饰喷泉，
  • Water reservoirs of the humidifiers and nebulisers of respiration machines used in hospital to maintain patients’ breathing,水库的抽湿机及nebulisers呼吸机的使用在医院，以维持patientsâ € ™呼吸，
  • and Cooling towers.和冷却水塔。

Infection occurs when a person breathes in water droplets that are contaminated by many legionella bacteria.感染发生时，一个人在呼吸的水滴是由许多受污染的军团菌。

Individual cases also sometimes occur and the source of the bacteria is not found.个别案件也有时会发生和来源的细菌，是没有发现。

Legionnaires' disease is not passed from person to person, nor from drinking water contaminated by Legionella bacteria.退伍军人症是不获通过，由人传人，也不是由饮用水污染的军团菌。