Pelletier P A, du Moulin G C, Stottmeier K D
Department of Anaesthesia, Harvard Medical School, Charles A. Dana Research Institute, Beth Israel Hospital, Boston, Massachusetts 02215.
Microbiol Sci. 1988 May;5(5):147-8.
The isolation of mycobacteria from municipal and hospital water supplies prompted an investigation of the susceptibility of environmental and clinical isolates of mycobacteria other than Mycobacterium tuberculosis and Mycobacterium bovis to free chlorine. Experiments revealed that free chlorine concentrations of 1.0 mg l-1 eliminated 100,000 c.f.u. of the mycobacterial strains tested within 8 hours of exposure, whereas a concentration of 0.15 mg l-1 had virtually no bacteriocidal effect. Free chlorine residual levels of 0.1 mg l-1 or less, depending on the water temperature, within Boston, suggest that current disinfection procedures may not be adequate for effective control of potentially pathogenic mycobacteria in public water supply systems serving a population with increased risk factors.
从市政和医院供水系统中分离出分枝杆菌，促使人们对除结核分枝杆菌和牛分枝杆菌之外的环境和临床分枝杆菌分离株对游离氯的敏感性进行调查。实验表明，游离氯浓度为1.0毫克/升时，在暴露8小时内可杀灭所测试的分枝杆菌菌株100,000菌落形成单位，而浓度为0.15毫克/升时几乎没有杀菌作用。根据波士顿的水温情况，游离氯残留水平在0.1毫克/升或更低，这表明目前的消毒程序可能不足以有效控制服务于具有更多风险因素人群的公共供水系统中潜在致病分枝杆菌。
