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目的:了解清远市区空调冷却塔水军团菌的检出情况、军团菌检出与环境(冷却塔水温度、冷却塔内相对湿度、pH值、余氯含量)和连续使用时间的关系以及军团菌的分型、鉴定。方法:根据《公共场所集中空调通风系统卫生规范》随机抽取清远市区公共场所32家,对其冷却塔水进行军团菌检测。结果:清远市空调冷却塔水军团菌检出率为51.42%,军团菌的检出与环境(冷却塔水温度、冷却塔内相对湿度、pH值)有关,军团菌菌型为嗜肺军团菌1型、2型、3型、6型、7型和10型,其中1型为优势菌株。结论:清远市区空调冷却塔水军团菌污染严重,应加强冷却塔水监测。
Objective: To understand the detection of Legionella pneumophila in Qingyuan urban air-conditioning cooling tower, the relationship between Legionella bacteria and the environment (cooling tower water temperature, relative humidity in cooling tower, pH, residual chlorine content) and continuous use time, Bacterial classification, identification. Methods: According to “Hygienic Standard for Central Air-conditioning and Ventilation System in Public Places”, 32 public places in Qingyuan urban area were randomly selected to detect Legionella in its cooling tower water. Results: The detection rate of Legionella pneumophila in Qingyuan air-conditioning cooling tower was 51.42%. The detection of Legionella was related to the environment (cooling tower water temperature, relative humidity inside the cooling tower, pH value), Legionella pneumophila Type 1, Type 2, Type 3, Type 6, Type 7 and Type 10, of which Type 1 was the predominant strain. Conclusion: Water Legionella contamination of air-conditioning cooling tower in Qingyuan urban area is serious, and cooling tower water monitoring should be strengthened.