医院常用消毒剂对肠出血性大肠杆菌O157:H7杀灭效果试验观察

EXPERIMENTAL OBSERVATION ON EFFICACY OF DISINFECTANTS COMMONLY USED IN HOSPITALS IN KILLING ENTERORRHAGIC Esherichia coli O157:H7

为了解医院常用消毒剂对肠出血性大肠杆菌O157:H7的杀灭效果及抗力变化,采用悬液定量杀菌试验进行了实验观察。结果,医院常用10种消毒剂在产品说明书规定的使用浓度下,对肠出血性大肠杆菌O157:H7杀灭率达到99.99%以上所需最短时间为5 m in,每次试验都可以达到合格要求;作用2 m in,则有部分试验杀灭率达不到99.9%。结论,10种常用消毒剂在常用浓度下对大肠杆菌O157:H7作用5 m in均可达到有效消毒效果,未发生明显抗力变化。

In order to know the efficacy of the disinfectants commonly used in hospitals in killing enterorrhagic Escherichia coll O157 ：H7 and changes of resistance of the bacteria, suspension quantitative germicidal test was used to carry out experimental observation. Results： The shortest time required for 10 disinfectants commonly used in hospitals at the use concentration specified in the product directions to kill over 99.99% of enterorrhagic Eshcerichia coli O157 ：H7 and to fulfil the eligible requirements in each test was 5 min. When the contact time was 2 min, the killing rate in some tests did not attain 99.9%. Conclusion： Ten common disinfectants at commonly used concentrations with a 5 min contact time could achieve efficacy of effective disinfection of E. coli O157：H7 and no obvious resistance change occurred.