Efficacy of thermal treatment and copper-silver ionization for controlling Legionella pneumophila in high-volume hot water plumbing systems in hospitals

1997 ◽  
Vol 25 (6) ◽  
pp. 452-457 ◽  
Author(s):  
Sue Miuetzner ◽  
Robert C. Schwille, ◽  
Adrianne Farley ◽  
Ellen R. Wald ◽  
John H. Ge ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Legionella Pneumophila ◽  
High Volume ◽  
Hot Water ◽  
Plumbing Systems

scholarly journals Environmental surveillance of Legionella pneumophila in hot water systems of hotels in Morocco

2021 ◽  
Author(s):  
Abdelwahid Assaidi ◽  
Afaf Soummane ◽  
Mostafa Ellouali ◽  
Hassan Latrache ◽  
Mohammed Timinouni ◽  
...  
Keyword(s):  
Risk Factors ◽  
Legionella Pneumophila ◽  
Water Samples ◽  
Water Systems ◽  
Hot Water ◽  
Strongly Correlated ◽  
Serological Typing ◽  
Premise Plumbing ◽  
Plumbing Systems ◽  
Survey Results

Abstract Objective: Environmental monitoring of Legionella in hot water systems of hotels in Morocco was performed during the period from January 2016 to April 2018. A total of 149 water samples from 118 different hotels were analyzed. Methods: A total of 149 water samples from 118 different hotels were analyzed. Possible risk factors were prospectively recorded, and data were analyzed in connection with building and plumbing systems characteristics. Data about building and risk factors were collected through a questionnaire survey. Results: Out of the 149 samples, 77(51.7%) were positive for L. pneumophila. Serological typing of the isolates revealed that 54 (70.1%) are L. pneumophila serogroup 2–15 and 23 (29.9%) are L. pneumophila serogroup 1. 56.8% of all buildings were colonized by L. pneumophila. Counts were over 1,000 CFU/L in 44%. Contamination was strongly correlated with temperature in the circulation, the age of the premise plumbing and the size of the building. Conclusions: The results showed a relevant exposure to L. pneumophila in the community and the identified risk factors can serve as indicators for risk assessment and relevant actions.

Influence of Hot Water Temperature and Use Patterns on Microbial Water Quality in Building Plumbing Systems

2021 ◽  
Author(s):  
Dienye L. Tolofari ◽  
Tim Bartrand ◽  
Sheldon V. Masters ◽  
Marylia Duarte Batista ◽  
Charles N. Haas ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Temperature ◽  
Hot Water ◽  
Microbial Water Quality ◽  
Use Patterns ◽  
Plumbing Systems

Rate of Legionella pneumophila colonization in hospital hot water network after time flow taps installation

2018 ◽  
Vol 98 (1) ◽  
pp. 60-63 ◽  
Author(s):  
M. Totaro ◽  
P. Valentini ◽  
A.L. Costa ◽  
S. Giorgi ◽  
B. Casini ◽  
...  
Keyword(s):  
Legionella Pneumophila ◽  
Hot Water ◽  
Water Network ◽  
Time Flow

LEGIONELLA PNEUMOPHILA IN HOSPITAL HOT WATER CYLINDERS

The Lancet ◽  
1982 ◽  
Vol 319 (8280) ◽  
pp. 1073 ◽  
Author(s):  
S.P Fisher-Hoch ◽  
M.G Smith ◽  
J.S Colbourne
Keyword(s):  
Legionella Pneumophila ◽  
Hot Water

Computational framework for evaluating risk trade-offs in costs associated with Legionnaires’ Disease risk, energy, and scalding risk for hospital hot water systems

2021 ◽  
Author(s):  
Ashley Heida ◽  
Alexis Mraz ◽  
Mark Hamilton ◽  
Mark Weir ◽  
Kerry A Hamilton
Keyword(s):  
Legionella Pneumophila ◽  
Disease Risk ◽  
Disease Outbreaks ◽  
Febrile Illness ◽  
Water Systems ◽  
Hot Water ◽  
Computational Framework ◽  
Trade Offs ◽  
Pontiac Fever ◽  
Legionnaires Disease

Legionella pneumophila are bacteria that when inhaled cause Legionnaires’ Disease (LD) and febrile illness Pontiac Fever. As of 2014, LD is the most frequent cause of waterborne disease outbreaks due...

Determinants of Legionella pneumophila Contamination of Water Distribution Systems: 15-Hospital Prospective Study

1987 ◽  
Vol 8 (9) ◽  
pp. 357-363 ◽  
Author(s):  
Richard M. Vickers ◽  
Victor L. Yu ◽  
S. Sue Hanna ◽  
Paul Muraca ◽  
Warren Diven ◽  
...  
Keyword(s):  
Legionella Pneumophila ◽  
Distribution System ◽  
Distribution Systems ◽  
Water Distribution ◽  
Cold Water ◽  
Physicochemical Characteristics ◽  
Hot Water ◽  
Environmental Study ◽  
Water Tank ◽  
One Year

AbstractWe conducted a prospective environmental study for Legionella pneumophila in 15 hospitals in Pennsylvania. Hot water tanks, cold water sites, faucets, and show-erheads were surveyed four times over a one-year period. Sixty percent (9/15) of hospitals surveyed were contaminated with L pneumophila. Although contamination could not be linked to a specific municipal water supplier, most of the contaminated supplies came from rivers. Parameters found to be significantly associated with contamination included elevated hot water temperature, vertical configuration of the hot water tank, older tanks, and elevated calcium and magnesium concentrations of the water (P < 0.05). This study suggests that L pneumophila contamination could be predicted based on design of the distribution system, as well as physicochemical characteristics of the water.

Molecular typing of the Legionella pneumophila population isolated from several locations in a contaminated water network

2004 ◽  
Vol 50 (1) ◽  
pp. 281-285 ◽  
Author(s):  
A.-S. Lepeuple ◽  
M. Jovic ◽  
M.-R. de Roubin
Keyword(s):  
Legionella Pneumophila ◽  
Molecular Typing ◽  
Random Amplified Polymorphic Dna ◽  
Hot Water ◽  
Water Network ◽  
Rapd Pattern ◽  
Different Populations ◽  
Definition Of ◽  
Different Strains ◽  
Key Steps

The RAPD (random amplified polymorphic DNA) technique has been developed for the molecular typing of Legionella in order to characterise the populations of hot water systems. During this study, 22 primers were tested and the four most informative ones were selected. The optimisation of the PCR conditions allowed the setting up of a powerful discriminative genotyping method. Moreover, the definition of a quality management method allowed definition of the key steps and the number of replicates to ensure reproducibility of the RAPD pattern. The RAPD was used to study the hot water network of a building. Legionella colonies (91) were isolated from seven locations and genotyped. The diversity of the population in one sample could vary from one to seven different strains. The study of the traceability showed that, in most of the cases, different populations could be present at different locations of the same network.

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