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首页> 美国卫生研究院文献>Epidemiology and Infection >Legionella pneumophila in cooling water systems. Report of a survey of cooling towers in London and a pilot trial of selected biocides.
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Legionella pneumophila in cooling water systems. Report of a survey of cooling towers in London and a pilot trial of selected biocides.

机译：冷却水系统中的军团菌。伦敦冷却塔调查报告和某些杀菌剂的试验性报告。

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Fourteen recirculating cooling water systems were surveyed during the summer, 1981, to see what factors might influence the prevalence of Legionella pneumophila. The effect on the organism of three anti-microbials was studied, each in two systems, by intermittent treatment at two week intervals. L. pneumophila was isolated from six of the 14 cooling systems at the beginning of the trial but by the end was present in ten. An association was found between the presence of the organism and the concentration of dissolved solids, and chlorides and the pH. There also appeared to be associations with exclusion of light and higher water temperatures. Repeated tests on eight untreated systems showed that two were consistently infected, three became and remained infected, one was infected on a single occasion and two were never infected with L. pneumophila. Treatment of a contaminated system, either with a 10 p.p.m mixture of a quaternary ammonium compound and tributyltinoxide or slow release chlorine briquettes (maximum recorded free chlorine level 1.2 p.p.m.), did not eliminated legionellae. Treatment of two infected towers with a chlorinated phenol (100 p.p.m.) eliminated legionellae for at least three days, but after 14 days the organism was again found.
机译：1981年夏天对十四个循环冷却水系统进行了调查，以了解哪些因素可能影响嗜肺军团菌的流行。通过在两周的间隔内进行间歇性治疗，研究了三种抗微生物剂对机体的影响，每种抗微生物剂分别在两个系统中使用。在试验开始时，从14个冷却系统中的6个中分离出了L. pneumophila，但最后有10个。发现生物体的存在与溶解固体的浓度，氯化物与pH之间存在关联。似乎还与排除光线和较高的水温有关。在八个未经处理的系统上进行的重复测试表明，有两个始终如一地被感染，三个被感染并保持感染，一个被单次感染，另外两个从未感染过肺炎乳杆菌。用10 p.p.m的季铵化合物和三丁基氧化锡的混合物或缓慢释放的氯团块（记录的最大游离氯水平为1.2 p.p.m.）处理受污染的系统并不能消除军团菌。用氯化苯酚（100 p.p.m.）处理两个被感染的塔至少要消灭军团菌至少三天，但在14天后又发现了这种生物。

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