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目的掌握某市公共场所集中空调冷却水和冷凝水中嗜肺军团菌的污染情况,为预防公共场所中军团菌的传播提供科学依据。方法采集2012年-2013年某市公共场所集中空调水的水样,按照《公共场所集中空调通风系统卫生规范》、《公共场所集中空调通风系统卫生规范》(WS 394-2012)中“冷却水、冷凝水中嗜肺军团菌检验方法”进行检验。结果 2012年284份水样,冷却水、冷凝水嗜肺军团菌检出率分别为10.4%、6.9%;2013年255份水样,冷却水嗜肺军团菌检出率为8.8%,冷凝水未检出嗜肺军团菌。2年检出率差异无统计学意义(P>0.05);不同类型场所检出率差异有统计学意义(P<0.05);冷却水4个季度检出率差异有统计学意义(P<0.01)。结论某市公共场所集中空调冷却水和冷凝水受军团菌污染,存在季节性差异,应加强集中空调系统的清洗消毒。
Objective To understand the pollution of Legionella pneumophila in the air-conditioning cooling water and condensate water of public places in a certain city, and to provide a scientific basis for preventing the spread of Legionella in public places. Methods The water samples of central air conditioning water in public places in a city from 2012 to 2013 were collected and analyzed in accordance with the Hygienic Standard for Central Air Conditioning and Ventilation Systems in Public Places and the Code for Hygienic Practice in Central Ventilation and Ventilation Systems in Public Places (WS 394-2012) Water, condensate in Legionella pneumophila test method "for testing. Results In 2012, the detection rates of Legionella pneumophila in 284 water samples, cooling water and condensate water were 10.4% and 6.9% respectively. In 2013, the detection rate of Legionella pneumophila in 255 water samples was 8.8% Legionella pneumophila not detected. (P <0.05). The detection rates of different types of places were significantly different (P <0.05). The detection rate of cooling water in 4 quarters was statistically significant (P <0.01) ). Conclusions There is a seasonal difference in the cooling and condensing water of centralized air-conditioners in public places in a certain city, and the cleaning and disinfection of centralized air-conditioning systems should be strengthened.