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RESEARCH PAPER
Prevalence of Legionella pneumophila in water distribution systems in hospitals and public buildings of the Lublin region of eastern Poland
1
Department of Medical Microbiology Medical University of Lublin, Poland
2
Pope John Paul II State School of Higher Education in Biała Podlaska, Poland
Corresponding author
Ann Agric Environ Med. 2015;22(2):195-201
KEYWORDS
Legionella pneumophilaLegionnaires’ diseasehot water distribution systemscolonizationwater temperature
ABSTRACT
Objective:
The aim of this study was to determine the prevalence of L. pneumophila in water supply systems, hospitals and public buildings in the Lublin region of eastern Poland.
Material and Methods:
The study was carried out in 26 different objects in the Lublin region. The number of Legionella bacteria in water samples was determined by the membrane filtration method and/or by surface inoculation in accordance with the standards.
Results:
The study showed the presence of L. pneumophila in 166 hot water samples (74.77%). In 34.33% (n=57) of water samples the count of tested bacteria exceeded the acceptable level of >100 CFU/100 ml. Of the samples where an acceptable level of bacteria was exceeded, 49 samples had an average level of L. pneumophila (100–1,000 CFU/100 ml), and the level in 8 samples was high (>1,000 CFU/100 ml).
Conclusions:
The water samples collected form the hot water supply system of hospitals and public buildings showed exceeded counts of L. pneumophila, indicating the risk of infection. The constant monitoring of water distribution systems is an important element of the control of infections caused by these organisms.
The aim of this study was to determine the prevalence of L. pneumophila in water supply systems, hospitals and public buildings in the Lublin region of eastern Poland.
Material and Methods:
The study was carried out in 26 different objects in the Lublin region. The number of Legionella bacteria in water samples was determined by the membrane filtration method and/or by surface inoculation in accordance with the standards.
Results:
The study showed the presence of L. pneumophila in 166 hot water samples (74.77%). In 34.33% (n=57) of water samples the count of tested bacteria exceeded the acceptable level of >100 CFU/100 ml. Of the samples where an acceptable level of bacteria was exceeded, 49 samples had an average level of L. pneumophila (100–1,000 CFU/100 ml), and the level in 8 samples was high (>1,000 CFU/100 ml).
Conclusions:
The water samples collected form the hot water supply system of hospitals and public buildings showed exceeded counts of L. pneumophila, indicating the risk of infection. The constant monitoring of water distribution systems is an important element of the control of infections caused by these organisms.
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