Water Distribution System in Building and Its Microbiological Contamination Minimization

2018 ◽  
pp. 251-267
Author(s):  
D. Káposztásová ◽  
Z. Vranayová ◽  
P. Purcz
Keyword(s):  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Microbiological Contamination

scholarly journals The role of water distribution system in HCAIs

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
F Mazzitelli ◽  
C Genovese ◽  
S D'Amato ◽  
V La Fauci ◽  
D Maisano ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
High Risk ◽  
Distribution System ◽  
Water Distribution ◽  
Statistical Difference ◽  
Water Distribution System ◽  
Healthcare Associated Infections ◽  
Microbiological Contamination ◽  
Positive Rate ◽  
Healthcare Associated

Abstract Introduction The water distribution system in hospitals may constitute a source of healthcare-associated infections. Understanding the means of acquisition, sources and reservoirs of nosocomial pathogens is crucial for developing methods to reduce the incidence of nosocomial infections. The aim of our study was to evaluate the microbiological contamination by Pseudomonas aeruginosa in the water system of the University Hospital “G. Martino” in Messina over a period of nine years, in order to a) clarify possible relationship between the presence of aerators and contamination, b) to highlight the presence of a yearly variation and c) to verify the statistical difference between microbiological contamination of taps with and without filters. Materials and Methods We carried out a retrospective study for nine year through the collection of water samples that were analysed for total bacteria count and Pseudomonas aeruginosa. The differences between the results recorded over the nine-year study period were evaluated using variance analysis. P values of < 0.05 were considered statistically significant. Software R was used for statistical assessment. Results We analysed a total of 6168 samples with a positive rate of 9.31% and a decreasing trend over the nine years to a value of 2.44% (p < 0.001), due to the elimination of the aerators of taps without filters and also to the introduction of filters in taps of high-risk wards and surgical rooms. We found statistical difference between taps with or without filter (p < 0.001) and a higher positive rate during the summer season compared to the other months. Also, an increase of the positivity rate was detected in some year due to the lack of monthly replacement of the filter. Conclusions These results reveal a high level of contamination of taps by opportunistic bacteria with severe implications especially for high-risk settings and therefore, the need to improve the management of these devices. Key messages Particular attention must be reserved to the water distribution systems in hospitals in order to prevent the spread of healthcare associated infections. The continued application and strengthening of guidelines and procedures is essential to limit the spread of multidrug resistant pathogens.

Assessment of Lisbon drinking water distribution network biofilm colonization and associated hazards

2008 ◽  
Vol 8 (4) ◽  
pp. 421-426
Author(s):  
J. Menaia ◽  
M. Benoliel ◽  
A. Lopes ◽  
C. Neto ◽  
E. Ferreira ◽  
...  
Keyword(s):  
Drinking Water ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Water Distribution Network ◽  
Storage Tanks ◽  
Water Pipe ◽  
Cultural Methods ◽  
Drinking Water Distribution ◽  
And Storage

Concerns arise from the possible occurrence of pathogens in drinking water pipe biofilms and storage tank sediments. In these studies, biofilm samples from pipes and sediments from storage tanks of the Lisbon drinking water distribution system were analyzed. Protein determinations and heterotrophic counts on pipe biofilm samples were used to assess the Lisbon network sessile colonization intensity and distribution. Indicator and pathogenic microorganisms were analyzed in pipe biofilm samples, as well as in storage tanks biofilm and sediments, by using cultural methods and PCR, to assess risks. Results have shown that the Lisbon network sessile colonization is relatively weak in intensity. In addition, no meaningful hazards were apparent for both the network biofilm and the storage tanks biofilm and sediments.

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