Treatment of a Legionella pneumophila-Colonized Water Distribution System Using Copper-Silver Ionization and Continuous Chlorination

@article{Biurrun1999TreatmentOA,
  title={Treatment of a Legionella pneumophila-Colonized Water Distribution System Using Copper-Silver Ionization and Continuous Chlorination},
  author={Amaya Biurrun and Luis Caballero and Carmen Pelaz and Elena Le{\'o}n and Alberto Gago},
  journal={Infection Control \&\#x0026; Hospital Epidemiology},
  year={1999},
  volume={20},
  pages={426 - 428}
}
Abstract The detection in April 1997 of a case of nosocomial legionellosis in our hospital led to the discovery that both our hot- and cold-water circuits were heavily colonized with Legionella pneumophila. Conventional methods for eradication of the organisms were unsuccessful, so a copper-silver (Cu-Ag) ionization system and a continuous chlorination system were installed. Five months later, the number of colonized sites decreased from an initial 58.3% to 16.7%. 
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References

SHOWING 1-10 OF 14 REFERENCES
Legionella Disinfection of Water Distribution Systems: Principles, Problems, and Practice
TLDR
Progress in the field of disinfection directed at hospital water systems has been necessarily slow, and cases of nosocomial legionellosis continue to appear, increasing pressures for hospitals to find solutions.
Controlled evaluation of copper-silver ionization in eradicating Legionella pneumophila from a hospital water distribution system.
TLDR
Copper-silver ionization can eradicate L. pneumophila in a water distribution system because of its relatively low cost, straightforward installation, easy maintenance, nontoxic by-products and the presence of a disinfecting residual.
Controlling Legionella in Hospital Water Systems: Experience With the Superheat-and-Flush Method and Copper-Silver Ionization
TLDR
It is concluded that a properly maintained and monitored copper-silver ionization system was more effective than the superheat-and-flush method for reducing the recovery of Legionella from the hospital water distribution system.
Disinfection of water distribution systems for legionella: a review of application procedures and methodologies.
Hospital-acquired legionella pneumonia is emerging as a major problem; potable water distribution systems have been shown to be the primary reservoirs for the legionella organisms. As a result,
Legionnaires' disease associated with a hospital water system. A five-year progress report on continuous hyperchlorination.
TLDR
Continuous hyperchlorination of the hot and cold water began in January 1982, and chlorine levels of 3 to 5 mg/L have been maintained most recently, and water samples have been consistently negative for Legionella for more than five years.
Efficacy of copper and silver ions and reduced levels of free chlorine in inactivation of Legionella pneumophila
TLDR
All disinfection systems, regardless of temperature or free chlorine concentration, showed increase inactivation rates when 400 and 40 micrograms of copper and silver per liter was added; however, this trend was significant only at 0.4 mg of free chlorine per liter.
[Guidelines for the prevention of nosocomial pneumonia].
TLDR
This revised guideline is designed to reduce the incidence of nosocomial pneumonia and is intended for use by personnel who are responsible for surveillance and control of infections in acute-care hospitals; the information may not be applicable in long-term-care facilities because of the unique characteristics of such settings.
Effect of Zidovudine Postexposure Prophylaxis on the Development of HIV-Specific Cytotoxic T-Lymphocyte Responses in HIV-Exposed Healthcare Workers
TLDR
HIV-specific cytotoxic T-lymphocyte responses may be useful as a surrogate marker of HIV replication in the evaluation of new regimens for PEP of occupational HIV exposures in healthcare workers with occupational exposures to HIV.
...
...