Legionella Concentration Articles & Analysis
12 articles found
Cooling systems are critical for large plants, power stations, and refineries for improving operational efficiency. They control temperature, improve processes, and protect efficiency. However, these systems can harbor dangerous bacteria, the most concerning being Legionella. Legionella is more than just another waterborne microorganism. It is the bacterium that causes Legionnaires’ ...
Soon afterward, Pennsylvania officials announced the discovery of the microbe in four of their schools. Nine positive Legionella tests in a week are far more than expected under normal conditions, and the number of schools testing positive for Legionella has increased since the initial reports. ...
How often should water systems be tested for Legionella? It’s recommended you test for Legionella weekly, as Legionella bacteria can grow to outbreak levels of 1,000 bacteria/mL within seven days. (1,2,3) Waiting longer than two weeks to regularly test your building’s water system can lead to serious consequences. ...
In the early 1980s investigations of potable water systems in hospital outbreaks indicated that the potable water is also a vector in disease transmission, either via aspiration of Legionella from the mouth into the lungs1 or via inhalation of droplets emitted by sinks and showers. ...
The present study investigated the effect of physical–chemical disinfection methods on the reduction of the concentration of Legionella in the biological treatment and in the treated effluent entering the river Wäster. Additionally, to gain insight into the factors that promote the growth of Legionella in biological systems, growth experiments ...
However, knowledge about the occurrence of Legionella in BTPs is scarce. Hence, we undertook a qualitative and quantitative screening for Legionella in BTPs treating waste water from municipalities and industries in Norway, to assess the transmission potential of Legionella from these installations. ...
Although the bacteria most often associated with Legionnair’s disease, Legionella pneumophila, is present in many waater systems, outbreaks are usually a result of large concentrations of Legionella pneumpohila. ...
Taking some time to clarify this point is important: The monitoring referred to here is not testing for Legionella. This is about monitoring the hazard control method. As an example, if chlorine is used to control the hazard, then the Team must decide and document what chlorine concentration range to apply (this is the critical control limit), the method used to ...
Legionella bacteria encounter optimum growing conditions in hot water systems and cooling towers. ...
More than 90% of Legionella cases are caused by Legionella pneumophila, a bacterium that thrives in warm to hot water. ...
A new field method to measure viable Legionella and total heterotrophic aerobic bacteria was evaluated in the laboratory, in split-sample blinded comparisons and in actual operating field conditions. The method was proven reliable for determining viable cell concentrations of Legionella pneumophila serogroup 1, serogroups 2-14 and ...
The method has been proven reliable for determining viable cell concentrations of Legionella pneumophila, Legionella species and total heterotrophic aerobic bacteria. ...