医院饮水机微生物污染状况调查

Microbial Contamination of Drinking Water Machine Using in Hospital:An Investigation

目的了解医院饮水机卫生状况,探讨降低饮水机直供水微生物污染的方法,为饮水机的清洗消毒提供依据。方法对某院12台饮水机分批次采样进行微生物污染情况调查,并检测清洗、加热、消毒的除菌效果。结果医院饮水机及直饮水样本细菌检测合格率为27.36%,夏季合格率仅5.26%;冷、热水阀出口水合格率分别为15.38%和85.71%,二者差异有统计学意义(χ2=22.61,P<0.01);饮用水的加热、饮水机的清洗、消毒均有明显除菌效果。结论医院饮水机微生物污染严重,饮水机直供水存在严重安全隐患,应加强对饮水机的清洗消毒和监测,提倡饮用煮沸水。

OBJECTIVE To investigate the contamination of drinking water machine in hospital,discuss the methods to decrease microbial contamination possibilities and provide basis for cleanliness and disinfection of drinking water machine. METHODS Water samples from 12 drinking water machines in a hospital were selected in various periods and tested for total sum counting of bacteria and Escherichia coli. RESULTS The eligible rate of bacteria tested in hospital drinking water machines was 27.36% and in summer it was only 5.26%. The eligible rate of cold and hot drinking water was 15.38%% and 85.71%,respectively,and there was a significant difference between them （χ^2=22.61,P〈0.01）. Heating,cleaning and disinfection had obvious effect on cleaning bacteria. CONCLUSIONS Microorganisms contamination of drinking water in hospital is severe. Cleanliness and surveillance of drinking water machine should be stressed and hot water should be advanced.