Routine sampling and the control of Legionella spp. in cooling tower water systems
Routine sampling and the control of Legionella spp. in cooling tower water systems
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DOI：
10.1007/s002840010133
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发表时间：
2000-10-01
影响因子：
2.6
通讯作者：
Bentham, RH
中科院分区：
文献类型：
--
作者：
Bentham, RH
在为期16周的夏季期间，对31个冷却塔系统的冷却水样本进行军团菌培养。已知选定的系统被军团菌定植。计算平均军团菌计数和标准差，并为每个系统准备时间序列相关图。所有系统中军团菌计数的标准偏差都非常大，表明系统在一段时间内变化很大。时间序列分析表明，在大多数情况下，收集时冷却塔中的军团菌计数与培养结果之间没有显著关系。在大多数系统（25/28）中，从同一系统中采集的军团菌样本间隔2周的培养结果没有统计学相关性。数据表明，对冷却塔健康风险的确定不能可靠地基于单一或不频繁的军团菌检测。
Cooling water samples from 31 cooling tower systems were cultured for Legionella over a 16-week summer period. The selected systems were known to be colonized by Legionella. Mean Legionella counts and standard deviations were calculated and rime series correlograms prepared for each system. The standard deviations of Legionella counts in all the systems were very large, indicating great variability in the systems over the time period. Time series analyses demonstrated that in the majority of cases there was no significant relationship between the Legionella counts in the cooling tower at time of collection and the culture result once it was available. In the majority of systems (25/28), culture results from Legionella samples taken from the same systems 2 weeks apart were not statistically related. The data suggest that determinations of health risks from cooling towers cannot be reliably based upon single or infrequent Legionella tests.