What is Legionella?

Legionella is indeed a microorganism that is commonly found in natural water sources such as rivers and lakes, but it has a particular affinity for man-made environments, especially where water is heated or aerosolized. It can proliferate in hot water systems, cooling towers, and plumbing systems, particularly when water temperatures are in the range of 20°C to 50°C (68°F to 122°F). This bacterium can lead to serious respiratory infections, notably Legionnaires' disease, when aerosolized water containing the bacteria is inhaled.

Understanding the habitat and growth conditions of Legionella is crucial for water system operators as they manage and treat water supplies to prevent outbreaks. Knowledge of proper water system maintenance, temperature control, and disinfection methods is essential to mitigate the risks associated with this pathogen, particularly in environments such as hospitals, hotels, and other facilities that may be conducive to its growth.

This underscores the importance of maintaining water systems in a sanitary state to prevent conditions that allow for Legionella proliferation.