Use of copper-silver ionization for the control of legionellae in alkaline environments at health care facilities
| Autor: | Neculai Codru, Erin Ingles, Dianna Schoonmaker-Bopp, David M. Dziewulski, John Strepelis |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
medicine.medical_specialty
Silver Epidemiology Legionella Colony Count Microbial Alkaline water Legionella pneumophila chemistry.chemical_compound Water Supply medicine Humans Food science Copper-silver ionization Colony-forming unit Cross Infection Infection Control Chlorine dioxide Legionellosis biology business.industry Health Policy Public Health Environmental and Occupational Health Treatment options biology.organism_classification medicine.disease respiratory tract diseases Surgery Disinfection Infectious Diseases chemistry Legionnaires' disease Health Facilities Legionnaires' Disease Water Microbiology business Copper |
| Zdroj: | American Journal of Infection Control. 43:971-976 |
| ISSN: | 0196-6553 |
| DOI: | 10.1016/j.ajic.2015.05.018 |
| Popis: | There are multiple treatment options for the control of legionellae in premise hot water systems. Water chemistry plays a role in the efficacy of these treatments and should be considered when selecting a treatment. This study demonstrated the efficacy of copper-silver ionization (CSI) under alkaline water conditions in 2 health care facilities.Monitoring for copper (Cu) and silver (Ag) ions was performed, and the corresponding percentage of positive Legionella cultures was monitored. Low Legionella colony forming units (CFU), with a mean10 CFU/100 mL, and ≤30% positive culture for each sampling period, along with no recurrent disease, were considered indicative of control.CSI treatment was shown to reduce both the number of CFU found and the percentage of samples found to be culture positive. After treatment was established, culture positivity was, for example, reduced from 70% (10(3) CFU/100 mL) to consistently30% (38 CFU/100 mL).Control of legionellae in premise water systems may be a complex process requiring long-term assessments for adequate control. This work found that CSI could be successful in controlling Legionella under alkaline water conditions, and the evidence suggests that Ag ions are responsible for the control of Legionella pneumophila 1, L pneumophila 6, and L anisa. |
| Databáze: | OpenAIRE |
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