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

  • Amaya Biurrun (a1), Luis Caballero (a2), Carmen Pelaz (a3), Elena León (a1) and Alberto Gago (a4)...


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%.


Corresponding author

Hospital Nta Sra del Prado, Departamento de Medicina Preventiva, Crta de Madrid, Km 114, 45600 Talavera de la Reina (Toledo), Spain


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