Effects of aerators, filters and chlorination on contamination of water samples: a nine years study in a Southern University Hospital

doi: 10.7417/CT.2019.2145

  • R. Squeri Department of Biomedical Sciences and Morphological and Functional Images, University of Messina
  • V. La Fauci Department of Biomedical Sciences and Morphological and Functional Images, University of Messina
  • D. Maisano Department of Biomedical Sciences and Morphological and Functional Images, University of Messina
  • GB. Costa Department of Biomedical Sciences and Morphological and Functional Images, University of Messina
  • C. Ceccio Department of Biomedical Sciences and Morphological and Functional Images, University of Messina
  • GM. Antonuccio Postgraduate Medical School in Hygiene and Preventive Medicine, University of Messina, Italy
  • S. Nucera Postgraduate Medical School in Hygiene and Preventive Medicine, University of Messina, Italy
  • C. Genovese Postgraduate Medical School in Hygiene and Preventive Medicine, University of Messina, Italy

Abstract

Objectives
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 our study between January 2010 and December 2018 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 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.


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

Published
2019-07-12
How to Cite
SQUERI, R. et al. Effects of aerators, filters and chlorination on contamination of water samples: a nine years study in a Southern University Hospital. La Clinica Terapeutica, [S.l.], v. 170, n. 4, p. e262 - e266, july 2019. ISSN 1972-6007. Available at: <http://www.clinicaterapeutica.it/ojs/index.php/ClinicaTerapeutica/article/view/451>. Date accessed: 22 oct. 2019.
Section
Original Article