PROXIMITY OF THE HOME TO A COOLING-TOWER AND RISK OF NON-OUTBREAK LEGIONNAIRES-DISEASE

被引:68
|
作者
BHOPAL, RS
FALLON, RJ
BUIST, EC
BLACK, RJ
URQUHART, JD
机构
[1] RUCHILL HOSP,DEPT LAB MED,GLASGOW G20 9NB,SCOTLAND
[2] SCOTTISH HLTH SERV COMMON SERV AGCY,DIV INFORMAT & STAT,EDINBURGH EH5 3SQ,SCOTLAND
来源
BRITISH MEDICAL JOURNAL | 1991年 / 302卷 / 6773期
关键词
D O I
10.1136/bmj.302.6773.378
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Objective-To study the source of non-outbreak legionnaires' disease, particularly the role of cooling towers, by comparing the locations of patients' homes in relation to the location of cooling towers. Design-Retrospective, descriptive study of a case series of patients with legionnaires' disease ill between 1978 and 1986 and, for comparison, a case series of patients with lung cancer. A prospectively developed register and interview based survey provided data on the location of cooling towers. Setting-The city of Glasgow. Patients-134 patients aged 14-84 with legionnaires' disease during 1978-86 and 10 159 patients with lung cancer during the same period. Main outcome measures-The locations of patients' homes and cooling towers as defined by postcodes, which provided map grid references accurate to 10 m; numbers of expected and observed cases of legionnaires' disease in census enumeration districts; and distance of enumeration districts from the nearest cooling tower as defined by five distance categories. Results-Most cooling towers were in or near the city centre or close to the River Clyde, as were the places of residence of patients with community acquired, non-travel, non-outbreak legionnaires' disease (n = 107). There was an inverse association between the distance of residence from any cooling tower and the risk of infection, the population living within 0.5 km of any tower having a relative risk of infection over three times that of people living more than 1 km away. There was no such association with respect to travel related legionnaires' disease, and for lung cancer the association was weak (relative risk less-than-or-equal-to 1.2 in any distance group). Conclusion-In Glasgow cooling towers have been a source of infection in two outbreaks of legionnaires' disease and, apparently, a source of non-outbreak infection also. Better maintenance of cooling towers should help prevent non-outbreak cases. This method of inquiry should be applied elsewhere to study the source of this and other environmentally acquired disease.
引用
收藏
页码:378 / 383
页数:6
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