大连市集中空调场所军团菌污染及人群健康状况影响调查

目的调查大连市集中空调场所冷却塔水军团菌污染状况及暴露人群中军团菌隐性感染状况,研究军团菌对人群健康的影响因素。方法2005年8～9月,随机采集大连市使用集中空调的32所公共场所集中空调冷却塔水,采用分离病原培养法进行军团菌检测;随机抽取使用集中空调场所的工作人员血样,采用微量凝集试验法,进行血清军团菌抗体检测。结果大连市公共场所集中空调冷却塔水军团菌检测的场所阳性率为53.13%,军团菌血清型分别为嗜肺军团菌(Legionella pneumophila,Lp)Lp7、Lp8、Lp9和Lp10型。其中,Lp9型28株,占总菌株的77.78%,为优势菌株。人群血清学抗体检测显示,使用集中空调的公共场所人群Lp10感染率较高。结论大连市使用集中空调的场所存在军团菌污染,人群中存在军团菌隐性感染。

Inspection on Legionella pollution and the health impact of workers in public places of central air conditioning systems in Dalian City

Objective To inspect the conditions of Legionella pollution in cooling towers of central air conditioning systems and the state of Legionella potential infection of workers in public places in Dalian City in order to study the impact factors related with Legionella organism infection.Methods From August to September 2005,water sample of 32 cooling towers were randomly collected. Legionella organism in water samples were detected. The blood samples were randomly collected from workers in public places of central air conditioning systems. The micro agglutination test was used for detecting the Legionella antibodies in blood samples.Results 53.13% of the cooling towers were positive with Legionella pneumophila (Lp) serogroup 7,8,9 and 10,of which,Lp9 isolates were predominant by 77.78% (N=28). The testing results of Legionella antibodies showed that the antibody levels of Legionella were the highest. The results implied there were potential infection of workers in public places of central air conditioning systems. Conclusion Legionella pollution exist in cooling towers and the Legionella potential infection were found in workers in public places of central air conditioning systems in Dalian City.