Environmental surveillance of <i>Legionella pneumophila</i> in hot water systems of hotels in Morocco

Assaidi, Abdelwahid; Soummane, Afaf; Ellouali, Mostafa; Latrache, Hassan; Timinouni, Mohammed; Zahir, Hafida; Mliji, El Mostafa

doi:10.2166/wh.2021.175

Cited by 3 publications

(2 citation statements)

References 35 publications

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“…L. pneumophila was isolated in 23.1% (25/108) of the total samples, with a range from 50 CFU/L to 3000 CFU/L. Previous studies reported widely varying proportions of Legionella -positive samples in hotel and public building hot water systems: 3.1% in a study in Japan [ 18 ], 8.5% in Spain [ 19 ], 18.5% in Greece [ 20 ], 51.7 in Morocco [ 21 ], and 60.5% in Italy [ 22 ]. Table 1 shows that 15 (28.8%) water samples from galvanized iron pipes were positive for L. pneumophila compared with 10 (17.8%) positive samples from plastic pipes, which was not statistically significant.…”

Section: Resultsmentioning

confidence: 99%

Influence of Metal Concentration and Plumbing Materials on Legionella Contamination

2022

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Legionella colonization of water supply pipes is a significant public health problem. The objective of this work was to evaluate Legionella colonization in hotel hot water systems and to investigate the relationship between metal concentrations, piping materials (galvanized iron pipes and plastic pipes), and Legionella proliferation. Concentrations of calcium and magnesium ions and the presence of Legionella pneumophila were determined in a total of 108 water samples from the hot water systems of four hotels in Split-Dalmatia County over a 12-month period, and additional data on piping materials were collected. L. pneumophila was isolated in 23.1% of all samples—in 28.8% (15/52) of water samples from galvanized iron pipes and in 17.8% (10/56) of samples from plastic pipes. L. pneumophila serogroups 2–14 were isolated from all samples. This study found higher prevalence of L. pneumophila at higher concentrations of Ca and Mg ions (except for Mg and plastic pipes). The metal parts of the water supply may be important factors in Legionella contamination due to the possibility of lime scale or roughness of the pipes. Higher Ca and Mg ion concentrations increased the risk of Legionella colonization.

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Section: Resultsmentioning

confidence: 99%

Influence of Metal Concentration and Plumbing Materials on Legionella Contamination

2022

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“…Legionellosis (Legionnaires’ disease), in fact, is a form of pneumonia interstitial which is normally transmitted via aerosol-containing bacteria, belonging to the genus Legionella that may be present in contaminated water sources, such as domestic hot water, fountains, equipment for respiratory therapy, cooling towers and other devices [ 4 ]. Legionellosis is often associated with travel and with staying in hotels [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Contamination of Hotel Water Distribution Systems by Legionella Species: Environmental Surveillance in Campania Region, South Italy

Onofrio

Pagano²,

Santulli

et al. 2023

Microorganisms

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The COVID-19 pandemic period was marked by the absence or reduced circulation of some infectious diseases. Legionellosis may have been affected by the prevention measures adopted to counter COVID-19. Legionellosis is a form of pneumonia interstitial that is normally transmitted via aerosol-containing bacteria (genus Legionella), that could be present in contaminated water sources and is often associated with travel and with staying in hotels. In this work, the data of the environmental surveys carried out by ARPA Campania in accommodation facilities since 2019 were analyzed for a better understanding of the dispersion patterns of L. pneumophila associated with the environment and to evaluate the variation of the data during the pandemic period. The aim was to provide a better understanding of Legionella at different geographic scales and to define a predictive epidemiological method. Results: In 2019, the Legionella genus contaminated 37.7% of all tourist facilities evaluated. In 2020, the Legionella genus contaminated 44.4% of all tourist facilities evaluated. In 2021, the Legionella genus contaminated 54.2% of all tourist facilities evaluated. Conclusions: Legionella pneumophila was the most prevalent species in our community, serogroup 1 was the most frequently isolated and the most implicated risk factor of contamination was the temperature of water in circulation.

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Machine learning-assisted environmental surveillance of Legionella: A retrospective observational study in Friuli-Venezia Giulia region of Italy in the period 2002–2019

Brunello

Civilini

Martin

et al. 2022

Informatics in Medicine Unlocked

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

Cited by 3 publications

References 35 publications

Influence of Metal Concentration and Plumbing Materials on Legionella Contamination

Influence of Metal Concentration and Plumbing Materials on Legionella Contamination

Contamination of Hotel Water Distribution Systems by Legionella Species: Environmental Surveillance in Campania Region, South Italy

Machine learning-assisted environmental surveillance of Legionella: A retrospective observational study in Friuli-Venezia Giulia region of Italy in the period 2002–2019

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