Influence of temperature on the number ofLegionella pneumophilain hot water systems

Autor:	D.G. Groothuis, H.L. Dijkstra, H.R. Veenendaal
Rok vydání:	1985
Předmět:	Hot Temperature biology Environmental engineering Legionella biology.organism_classification Applied Microbiology and Biotechnology Microbiology Legionella pneumophila Tap water Water temperature medicine Environmental science Flushing medicine.symptom Water Microbiology Water pollution
Zdroj:	Journal of Applied Bacteriology. 59:529-536
ISSN:	0021-8847
DOI:	10.1111/j.1365-2672.1985.tb03356.x
Popis:	The occurrence of legionella in the hot water systems of two buildings (A and B) was investigated in relation to the water temperature. The peripheral parts of both hot water systems were found to be colonized by these organisms. A temperature of 60 degrees C in the hot water mains returning from the building eliminated legionellas from the mains as well as from the peripheral taps and showers. Legionellas could be isolated from taps, showers and the mains when the temperature in the return mains was kept at 54 degrees C. The hot water systems could not be completely decontaminated by raising the hot water temperature in the return mains to 70 degrees C combined with flushing all the taps and showers. It is suggested that failure to decontaminate the systems is due to dead ends in the pipeline network, which are not reached by the hot water and that these dead ends are the source for recolonization of the systems.
Databáze:	OpenAIRE
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