Investigation on Sanitation Administration and Legionella pneumophila Contamination in Central Air Conditioning System of Public Places
- VernacularTitle:公共场所集中空调卫生管理现状及其冷却水嗜肺军团菌污染状况调查
- Author:
Lixia ZHANG
;
Baoying ZHANG
;
Fan LIU
- Publication Type:Journal Article
- Keywords:
Legionella pneumophila;
Central air conditioning system;
Cooling tower.
- From:
Journal of Environment and Health
1993;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To know the hygienic administration status of central air conditioning system(CACS)and the Legionella contamination of cooling water in public places; and to identify the risk factors for legionella contamination associated with hygienic administration measures of CACS. Methods One hundred and forty-eight public places with CACS were recruited and the hygienic administration status was investigated by questionnaire survey in Sep. 2008. The culture methods were used to identify Legionella in cooling water. Results Positive rate of Legionella pneumophila in cooling water was 68.1%, 65.1% and 66.7% respectively in the condition of disinfection, preservative (detergent) and regular examination of the cooling water. The positive rate of Legionella pneumophila in cooling water was 92%, 87.7% and 84.7% respectively without disinfection, preservative,detergent and regular examination of the cooling water. Conclusion Disinfection, preservative,detergent and regular examination of the cooling water can reduce Legionella contamination risk.
