Water disinfection with ozone, copper and silver ions, and temperature increase to control Legionella:: seven years of experience in a university teaching hospital

被引:72
作者
Blanc, DS [1 ]
Carrara, P
Zanetti, G
Francoli, P
机构
[1] CHU Vaudois, Div Hosp Prevent Med, CH-1011 Lausanne, Switzerland
[2] Univ Lausanne Hosp, Tech Serv, Lausanne, Switzerland
关键词
Legionella; water; desinfection;
D O I
10.1016/j.jhin.2004.10.016
中图分类号
R1 [预防医学、卫生学];
学科分类号
1004 ; 120402 ;
摘要
The efficacy of ozonation, copper-silver ionization and increased temperature in controlling Legionella spp. in the hot water distribution networks of a university hospital was evaluated. Two separate water distribution networks were studied; network 1 which supplies the surgical intensive care units, and network 2 which supplies the medical intensive care units and the emergency room. Network 1 has been disinfected by ozonation since 1995, and network 2 has been disinfected by ionisation since 1999. The hot water temperature was increased from 50 to 65 degrees C in 1998 and 2000 in networks 1 and 2, respectively. Water samples and swabs of the water outlets were cultured for Legionella spp. between four and six times each year, providing data before and after implementation of the disinfection procedures. There was no significant difference in the proportion of samples positive for Legionella spp. after ozonation in network 1 or after ionization in network 2. In both networks, there was a significant reduction in legionella isolates after increasing the hot water temperature to 65 degrees C. Maintaining the hot water temperature above 50 degrees C throughout both networks proved to be the most effective control measure in our hospital. (c) 2004 The Hospital Infection Society. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:69 / 72
页数:4
相关论文
共 16 条
[1]   EFFECTS OF 3 OXIDIZING BIOCIDES ON LEGIONELLA-PNEUMOPHILA SEROGROUP-1 [J].
DOMINGUE, EL ;
TYNDALL, RL ;
MAYBERRY, WR ;
PANCORBO, OC .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1988, 54 (03) :741-747
[2]   EFFICACY OF OZONE IN ERADICATION OF LEGIONELLA-PNEUMOPHILA FROM HOSPITAL PLUMBING FIXTURES [J].
EDELSTEIN, PH ;
WHITTAKER, RE ;
KREILING, RL ;
HOWELL, CL .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1982, 44 (06) :1330-1334
[3]   Evaluation of the efficacy of ultraviolet irradiation for disinfection of hospital water contaminated by Legionella [J].
Franzin, L ;
Cabodi, D ;
Fantino, C .
JOURNAL OF HOSPITAL INFECTION, 2002, 51 (04) :269-274
[4]   Literature review -: efficacy of various disinfectants against Legionella in water systems [J].
Kim, BR ;
Anderson, JE ;
Mueller, SA ;
Gaines, WA ;
Kendall, AM .
WATER RESEARCH, 2002, 36 (18) :4433-4444
[5]   Effect of monochloramine disinfection of municipal drinking water on risk of nosocomial Legionnaires' disease [J].
Kool, JL ;
Carpenter, JC ;
Fields, BS .
LANCET, 1999, 353 (9149) :272-277
[6]   Ionization failure not due to resistance [J].
Lin, YE .
CLINICAL INFECTIOUS DISEASES, 2000, 31 (05) :1315-1316
[7]   Negative effect of high pH on biocidal efficacy of copper and silver ions in controlling Legionella pneumophila [J].
Lin, YSE ;
Vidic, RD ;
Stout, JE ;
Yu, VL .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 2002, 68 (06) :2711-2715
[8]   MONITORING OF HOSPITAL WATER-SUPPLIES FOR LEGIONELLA [J].
LIU, WK ;
HEALING, DE ;
YEOMANS, JT ;
ELLIOTT, TSJ .
JOURNAL OF HOSPITAL INFECTION, 1993, 24 (01) :1-9
[9]   CONTROLLED EVALUATION OF COPPER-SILVER IONIZATION IN ERADICATING LEGIONELLA-PNEUMOPHILA FROM A HOSPITAL WATER DISTRIBUTION-SYSTEM [J].
LIU, ZM ;
STOUT, JE ;
TEDESCO, L ;
BOLDIN, M ;
HWANG, C ;
DIVEN, WF ;
YU, VL .
JOURNAL OF INFECTIOUS DISEASES, 1994, 169 (04) :919-922
[10]   Intermittent use of copper-silver ionization for Legionella control in water distribution systems:: A potential option in buildings housing individuals at low risk of infection [J].
Liu, ZM ;
Stout, JE ;
Boldin, M ;
Rugh, J ;
Diven, WF ;
Yu, VL .
CLINICAL INFECTIOUS DISEASES, 1998, 26 (01) :138-140