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NSW Health is investigating water cooling towers in Castle Hill after three people contracted legionnaires’ disease.

The three men developed a sub-type of the disease caused by legionella pneumophila bacteria, according to a NSW health alert yesterday.  The lung infection can develop when a person breathes in contaminated water droplets.  

NSW Health director communicable diseases Vicky Sheppeard said the bacteria that causes legionnaires’ disease live and multiply in the water used to cool air-conditioning systems.  Infection is prevented by routinely maintaining these systems, dr Sheppeard said.

“People outside can be exposed to the bacteria when a water cooling system emits contaminated water particles into the air.”

Reference : Sydney Morning Herald, 14Ffebruary 2018 

Proficiency Testing Australia (PTA) provides Legionella proficiency testing program. 

For more information about the Legionella  PT program, please contact This email address is being protected from spambots. You need JavaScript enabled to view it.