- Internal and external factors can lead to Legionella growth in building water systems.
- Legionella grows best in large, complex water systems that are not adequately maintained.
- Water containing Legionella is aerosolized through devices.
- People can get Legionnaires’ disease when they breathe in mist or accidentally swallow water into the lungs containing Legionella. Those at increased risk are adults 50 years or older, current or former smokers, and people with a weakened immune system or chronic disease.
See graphic illustration here.
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*Information from the Center for Disease Control (CDC)