惠州市集中空调军团菌污染现状及人群感染调查报告

Huizhou air- conditioning corps bacteria contamination and population survey report

目的：了解惠州市军团菌的污染现状及人群军团菌的感染程度，为制定预防和控制军团菌感染策略提供依据。方法：采用分离鉴定与ELISA方法，对惠州市186份集中空调冷却塔水进行军团菌分离鉴定，对215例暴露人群及152例对照人群进行军团菌抗体IgG检测。结果：本次调查集中空调嗜肺军团菌检出率为51．3％，共检出62株嗜肺军团菌，其中，LP1型37株、LP2～LP14型25株；215份暴露人群中检出军团菌抗体阳性29份，阳性率13．4％，152份对照人群中检出军团菌抗体阳性7份，阳性率4．6％。结论：惠州市集中空调冷却塔水中军团菌污染现状较为严重，已对暴露人群的健康造成潜在威胁，对这一潜在传染来源应采取立体、有效防范措施。

Objective： To investigate the status of the Legionella contamination and infection in crowd in Huizhou City,in order to constitute the prevention and control strategy of Legionella infection.Methods： 186 Cooling tower water samples from central air conditioning system in Huizhou City were cultured and then Legionella was isolated and identified; The antibodies IgG against Legionena of 215 dangerous group and 152 control were detected by Enzyme - linked Immunosorhent Assay（ ELISA）. Results： The detection rate of Legionella pneumophilia in this survey of central air conditioning system is 51.3 % ,62 strains of Legionella pneumophilia were isolated, among them 37 strains were serovar LP1, and 25 strains were serovar LP2 - LP14 ; There were 29 cases of anti - Legionella positive in the 215 dangerous group, with the positive rate of 13.4%, and there were 7 cases of anti - Legionella positive in the 152 control, with the positive rate of 4.6% ; Conclusion： The water in cooling tower of central air conditioning system in Huizhou city has been contaminated seriously with Legionella,and it has already being a latent threat to the health of dangerous group, thus spatial and effective preventive measures to this potential source of infection should be taken as soon as possible.