Occurrence of Legionellae

Occurrence of legionellae - media-related

• Occurrence in fresh and saline water
• Occurrence in the ground
• Free living and in host organisms (amoebae, ciliates)

• Optimum water temperature is about 25 °C to 50 °C

Occurrence of legionellae - system-related

• Warm water systems in public buildings
• Hospitals, spa facilities, sanatoriums with pool facilities, senior citizens¿ and nursing homes
• Swimming pools (outdoor and indoor pools), sauna facilities, whirlpools
• Hotels (unused or rarely occupied rooms)
• Air conditioning systems
• Sports facilities (gyms, stadiums)

• Fountains

Anywhere where aerosols (spray) are generated and warm water is present, there is a particular risk.