Legionellosis
Legionellosis is a disease caused by Legionella bacteria. There are two different types of Legionellosis:
- Legionnaires' disease: This is the more severe form of infection that causes pneumonia.
- Pontiac fever: This is a mild respiratory illness without pneumonia.
Legionella can become a health concern when it grows and spreads in human-made building water systems.
Causes and Common Sources of Infection
Legionella is a type of bacterium found naturally in freshwater environments, like lakes and streams. It can become a health concern when it grows and spreads in human-made building water systems like:
- showerheads and sink faucets
- cooling towers in air conditioning systems
- hot tubs and whirlpools not drained after each use
- decorative fountains and water features
- hot water tanks and heaters
- birthing pools
- large plumbing systems
- drinking fountains
Although it is possible for Legionella bacteria to grow in home plumbing systems, most outbreaks of the bacteria occur in large buildings with complex water systems.
Knowledge Check Choose the best answer for the question.
1-1. Most outbreaks of Legionella bacteria occur in _____.
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