Next Article in Journal
The 3′ Untranslated Region of a Plant Viral RNA Directs Efficient Cap-Independent Translation in Plant and Mammalian Systems
Previous Article in Journal
Comparative Evaluation of the Immune Responses in Cattle Mammary Tissues Naturally Infected with Bovine Parainfluenza Virus Type 3 and Bovine Alphaherpesvirus-1
Article Menu

Export Article

Open AccessArticle
Pathogens 2019, 8(1), 27; https://doi.org/10.3390/pathogens8010027

Factors Influencing Legionella Contamination of Domestic Household Showers

College of Science and Engineering, Flinders University, GPO Box 2100, Adelaide 5001, Australia
*
Author to whom correspondence should be addressed.
Received: 14 January 2019 / Revised: 19 February 2019 / Accepted: 20 February 2019 / Published: 26 February 2019
(This article belongs to the Section Human Pathogens)
Full-Text   |   PDF [1142 KB, uploaded 26 February 2019]   |  

Abstract

Legionnaires’ disease is a potentially fatal pneumonia like infection caused by inhalation or aspiration of water particles contaminated with pathogenic Legionella spp. Household showers have been identified as a potential source of sporadic, community-acquired Legionnaires’ disease. This study used qPCR to enumerate Legionella spp. and Legionella pneumophila in water samples collected from domestic showers across metropolitan Adelaide, South Australia. A survey was used to identify risk factors associated with contamination and to examine awareness of Legionella control in the home. The hot water temperature was also measured. A total of 74.6% (50/68) and 64.2% (43/68) showers were positive for Legionella spp. and L. pneumophila, respectively. Statistically significant associations were found between Legionella spp. concentration and maximum hot water temperature (p = 0.000), frequency of shower use (p = 0.000) and age of house (p = 0.037). Lower Legionella spp. concentrations were associated with higher hot water temperatures, showers used at least every week and houses less than 5 years old. However, examination of risk factors associated with L. pneumophila found that there were no statistically significant associations (p > 0.05) with L. pneumophila concentrations and temperature, type of hot water system, age of system, age of house or frequency of use. This study demonstrated that domestic showers were frequently colonized by Legionella spp. and L. pneumophila and should be considered a potential source of sporadic Legionnaires’ disease. Increasing hot water temperature and running showers every week to enable water sitting in pipes to be replenished by the municipal water supply were identified as strategies to reduce the risk of Legionella in showers. The lack of public awareness in this study identified the need for public health campaigns to inform vulnerable populations of the steps they can take to reduce the risk of Legionella contamination and exposure. View Full-Text
Keywords: Legionella pneumophila; Legionnaires’ disease; opportunistic pathogens; potable water; water quality; public health Legionella pneumophila; Legionnaires’ disease; opportunistic pathogens; potable water; water quality; public health
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Hayes-Phillips, D.; Bentham, R.; Ross, K.; Whiley, H. Factors Influencing Legionella Contamination of Domestic Household Showers. Pathogens 2019, 8, 27.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Pathogens EISSN 2076-0817 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top