Information – Legionnaires’ Disease

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Legionnaires’ disease (LD) is a serious, and often deadly, lung infection (pneumonia). People usually get it by breathing in water droplets containing Legionella germs. People can also get it if contaminated water accidentally goes into the lungs while drinking. Many people being treated at health care facilities, including long-term care facilities and hospitals, have conditions that put them at greater risk of getting sick and dying from LD. Legionella grows best in buildings with large water systems that are not managed effectively. CDC outbreak investigations show that effective water management programs—actions that reduce the risk of Legionella growing and spreading in building water systems—can help prevent problems that lead to LD. Health care facility leaders* should be aware that LD is a risk in their facility and that they can take action to prevent infections.

Health care facility leaders can

  • Build a team focused on keeping their facility’s water safe.
  • Create and use a water management program to limit Legionella and other waterborne germs from growing and spreading.
  • Work with healthcare providers to identify LD cases early and determine if the cases may be associated with a health care facility.
  • Report LD cases to local public health authorities quickly and work with them to investigate and prevent additional cases.

*Leaders may include infection control practitioners, facility managers, hospital administrators, quality assurance staff, or others.

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