Groothuis D G, Veenendaal H R, Dijkstra H L
J Appl Bacteriol. 1985 Dec;59(6):529-36. doi: 10.1111/j.1365-2672.1985.tb03356.x.
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.
针对两栋建筑（A和B）热水系统中军团菌的出现情况与水温的关系展开了调查。结果发现，这两个热水系统的外围部分均有这些微生物定殖。从建筑物返回的热水主管中水温达到60摄氏度时，主管以及外围水龙头和淋浴喷头中的军团菌都被清除。当返回主管中的水温保持在54摄氏度时，水龙头、淋浴喷头和主管中均可分离出军团菌。将返回主管中的热水温度提高到70摄氏度并同时冲洗所有水龙头和淋浴喷头，无法使热水系统完全去污。研究表明，系统未能去污是由于管网中存在热水无法到达的死端，而这些死端是系统重新定殖的源头。
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