饮水机微生物污染及消毒效果观察

目的：了解饮水机微生物污染状况并探讨有效消毒方法。方法：检测了52台饮水机内胆水细菌总数，霉菌和酵母菌，并观察了8台饮水机用1／10优洁消毒剂消毒2min前后内胆水细菌总数的变化。结果：饮水机内胆水细菌总数中位数440cfu/ml，超标率96．15％，霉菌和酵母菌中位数0cfu/ml，超标率30．77％，1／10优洁消毒剂接触2min,对5台饮水机内胆杀菌率均为100％，对其余3台的杀菌率分别为99．56％，99．77％和99．78％，其中个别未杀灭的细菌为芽孢杆菌，结论：饮水机内胆微生物污染严重，1／10优洁消毒剂接触2min，可有效消毒饮水机内胆。

Observation on Microbiological Pollution and Disinfective Effectiveness in Drinking Water Dispensers

Objective To understand the microbiological pollution of drinking water dispensers and find out the effective disinfection method for dispensers. Methods The counts of bacteria, fungi and yeast in water samples collected from the water stored in liners of 52 drinking water dispensers were determined. The total counts of bacteria in water samples of 8 water dispensers were determined before and after disinfection by 1/10 YOUJIE disinfectant for 2 min. Results The medians and over standard rates were 440 cfu/ml and 96.15% for the total count of bacteria, 0 and 30.77% for fungi and yeast in the water samples before disinfection respectively. After 2_min disinfection by 1/10 YOUJIE disinfectant, 5 of 8 drinking water dispensers showed bactericidal rates of 100% and other 3 water dispensers showed bactericidal rates of 99.56%, 99.77% and 99.78% respectively. Bacillus was found in some unkilled bacteria. Conclusion Microbiological pollution in water stored in liners of drinking water dispensers was high, which could be effectively eliminated and disinfected by 1/10 YOUJIE disinfectant for 2 min.