清远市空调冷却塔水军团菌污染状况调查

The investigation of Legionella pollution with cooling tower water of air conditioning in Qingyuan city

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 in public place in Qingyuan city and the relation between the result with the consecutively using time and environment including the water temperature of cooling tower,relative humidity inside cooling tower,pH value,chlorine residual,identification and typing of Leginoella.Methods： Water samples were collected from 32 public places in Qingyuan following the health specification of central air conditioning ventilating system in public places.Then the samples for Legionella detection.Results： The isolating rate of Legionella is 51.42% in public places in Qingyuan.There was relation between isolating rate and environment including the water temperature of cooling tower,relative humidity,pH value.There were six serotypes of Legionella isolated in Qingyuan,including serotypes 1,2,3,6,7 and 10,of which the most frequent is serotype 1.Conclution： The Legionella pollution with cooling tower water of air conditioning in Qingyuan city is in a serious situtation.Measures should be taken to strengthen the monitoring of the water of cooling tower.