Émilie Bédard
, Inès Boppe, Serge Kouame, Philippe Martin, Linda Pinsonneault, Louis Valiquette, Jules Racine et Michèle Prévost
Article de revue (2016)
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Abstract
Following nosocomial cases of Legionella pneumophila, the investigation of a hot water system revealed that 81.5% of sampled taps were positive for L. pneumophila, despite the presence of protective levels of copper in the water. A significant reduction of L. pneumophila counts was observed by culture after heat shock disinfection. The following corrective measures were implemented to control L. pneumophila: increasing the hot water temperature (55 to 60 degrees C), flushing taps weekly with hot water, removing excess lengths of piping and maintaining a water temperature of 55 degrees C throughout the system. A gradual reduction in L. pneumophila counts was observed using the culture method and qPCR in the 18 months after implementation of the corrective measures. However, low level contamination was retained in areas with hydraulic deficiencies, highlighting the importance of maintaining a good thermal regime at all points within the system to control the population of L. pneumophila.
Mots clés
Legionella pneumophila; copper concentration; culture; hospital premise plumbing; legionellosis; quantitative polymerase chain reaction; sanitary hot water; temperature diagnostic
| Sujet(s): |
1000 Génie civil > 1007 Ressources et approvisionnement en eau 5200 Microbiologie > 5201 Bactériologie |
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| Département: | Département des génies civil, géologique et des mines |
| Organismes subventionnaires: | CRSNG / NSERC Industrial Chair on Drinking Water |
| URL de PolyPublie: | https://publications.polymtl.ca/3603/ |
| Titre de la revue: | Pathogens (vol. 5, no 2) |
| Maison d'édition: | MDPI |
| DOI: | 10.3390/pathogens5020035 |
| URL officielle: | https://doi.org/10.3390/pathogens5020035 |
| Date du dépôt: | 10 mars 2020 14:45 |
| Dernière modification: | 21 nov. 2024 03:05 |
| Citer en APA 7: | Bédard, É., Boppe, I., Kouame, S., Martin, P., Pinsonneault, L., Valiquette, L., Racine, J., & Prévost, M. (2016). Combination of heat shock and enhanced thermal regime to control the growth of a persistent Legionella pneumophila strain. Pathogens, 5(2). https://doi.org/10.3390/pathogens5020035 |
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