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HealthInfo Canterbury

Legionnaires' disease (legionellosis)


Legionnaires' disease can be very serious. If you think you may have it, see your doctor immediately.

Legionnaires' disease is a chest infection (pneumonia) caused by the Legionella bacteria. People usually catch the disease by breathing in water droplets that contain the bacteria. Possible sources of contaminated water droplets include piped hot water, air conditioners, spa pools and compost.

Symptoms of Legionnaire's disease include:

If your doctor suspects you may have Legionnaires' disease, you will need to take special antibiotics. You will also need tests, which may include:

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Written by HealthInfo clinical advisers. Endorsed by community respiratory physician, Canterbury DHB. Last reviewed May 2017.


Page reference: 49708

Review key: HILEG-49708