公共场所中央空调冷却塔水军团菌生态学研究

Study on ecology of legionella in cooling tower water of air-conditioning systems in public place

目的:了解中央空调冷却塔水军团菌生态学分布特征。方法:采用分离培养方法,对象山县公共场所中央空调冷却塔水中的军团菌分布进行研究。结果:夏秋季军团菌检出率高,冬春季节未能检出。不同场所军团菌检出率不同,医院、宾馆酒店阳性率分别达78.95%、50.70%。菌型分布为多样性,主要为嗜肺军团菌Lp 1型,占68.7%。检出率还与中央空调冷却塔基座类型相关,漏斗型未检出军团菌,只有平台型检出军团菌。结论:中央空调冷却塔水中军团菌消长有季节性,菌型分布多样性,以医院、宾馆等公共场所,冷却塔基座为平台型的中央空调为重点。

Objective ：To explore the ecological distributional characteristics of legionella in cooling tower water of air - conditioning systems. Methods： The distribution of legionella in cooling tower water of air - conditioning systems in public place in Xiangshan was investigated through separation e, ulture. Results： The detection rate of le- gionella was increased in summer and autumn, and decreased to zero in winter and spring. The positive rates from different public places were not concordant, with 78.95% amt 50.70% in hospital and guesthouse separately. The bacterium type was varied, Lp 1 with a percentage of 68.7% was the predominant type. Detection rate was also re- lated to base type of cooling tower, because it was only found to be positive in platform type. Conclusion： The growth and decline of legionella in cooling tower water of air - conditioning systems was related to season, and the bacterium type was varied. The air - conditioning systems with platform base in hospital and guesthouse should be the key site for monitoring.