What protocol should be followed if high levels of Legionella are detected in hotel water systems?

When high levels of Legionella are detected in hotel water systems, the appropriate action is to chlorinate and flush the system. This method is effective in eliminating the bacteria and reducing the risk of Legionnaires' disease, which can be contracted from inhaling aerosols contaminated with Legionella. Chlorination involves adding chlorine to the water system, which acts as a disinfectant, while flushing helps to remove stagnant water where bacteria may have proliferated.

Chlorination and flushing do not just mitigate the immediate presence of Legionella; they also help to restore the system’s overall safety for use by ensuring that the water is free from harmful pathogens. This step is crucial in maintaining public health, particularly in a hotel setting where many guests could be at risk.

In contrast, actions like monitoring guests or routine cleaning are inadequate responses to an immediate health threat posed by high levels of Legionella. Temporary closure might be necessary if there are additional health risks, but the immediate response involves treating the water system to make it safe for continued use.