手机大肠菌群污染状况调查及消毒方法研究

Microbial Contamination on Cell-phone and Ways for Disinfection

目的了解手机的污染状况,研究实用可行的手机消毒方法。方法采用问卷调查的方式进行手机使用习惯的调查,参照《公共场所茶具微生物检验方法大肠菌群测定》(GB/T 18204.3-2000)的要求进行大肠菌群的采样、检测和评价,依据消毒技术规范(2002)的要求利用酒精擦拭法和紫外线照射法进行消毒效果的检测和评价。结果问卷调查结果显示,50份问卷调查显示每人每天手机的使用次数超过20次的人数占58%,手机使用前后洗手的人数只占6%,定期对手机进行清洗消毒的人数只占到2%;污染状况的调查显示大肠菌群的污染率为46%;75%的酒精棉球在对染有金黄色葡萄球菌和大肠杆菌的手机表面擦拭消毒后,试验的平均杀灭对数值为5.41和5.54(≥3.00),消毒合格,试验重复3次;紫外线手机消毒器,在对染有金黄色葡萄球菌和大肠杆菌的手机表面作用12 min后,试验的平均杀灭对数值为3.08和3.10(≥3.00),消毒合格,试验重复3次。结论手机的卫生状况不容忽视,人们对手机的定期清洁和消毒意识薄弱,要养成良好的手机使用习惯,如经常洗手和定期清洁和消毒手机,避免疾病的发生和流行。

Objectives To learn the situation of microbial contamination on cell-phones and to search feasible and practical ways for disinfection. Methods The habit for using cell-phone was surveyed by questionnaire,and the contamination of coliform bacteria on cell-phones was evaluated according to the National Standard GB / T 18204. 3- 2002. The disinfection method was conducted according to the 'Technical Standard for Disinfection( 2002) 'by wiping with alcohol and UV irradiation. Results The subjects using cell-phones more than 20 times a day accounted for 58%,the subjects washing hands before and after using cell-phone accounted for 6%,and the subjects regularly cleaning and disinfecting cell-phone accounted only for 2%. The results showed that the contamination rate of coliform bacteria on cell-phone was 46%. The contamination of E. coli and staphylococcus aureus on the surfaces of cell-phone could be wiped and disinfected by cotton ball absorbed with 75% alcohol; the average killing logarithm values were 5. 41 and 5. 54( ≥3. 00) respectively; the disinfection was qualified in three repeated tests. The contamination of E. coli and staphylococcus aureus on the surface of cell-phone was decreased by UV disinfection machine irradiated for 12 min; the average killing logarithm values were 3. 08 and 3. 10( ≥3. 00) respectively; and the disinfection was qualified in three repeated tests. Conclusions The hygienic situation of cell-phone is often neglected and the consciousness of cleaning and disinfecting cell-phone was weak in general people. Good habits of using cell-phone,such as washing hands before and after using cell-phone each time and cleaning and disinfecting cell-phone regularly,should be developed to avoid the epidemic of diseases.