背景:近年来,手部干燥已被强调为适当手部卫生的关键步骤,因为手上的水分会增加微生物从手到表面的转移,反之亦然。
目的:了解人工干燥后的细菌和病毒雾化,并研究使用不同方法干燥后微生物从手到表面的转移。
方法:由五名志愿者组成的小组用肥皂预先洗手,冲洗和干燥,然后用荧光假单胞菌和MS2噬菌体的浓缩混合物接种。志愿者进入一个空洗手间,一次一个,并用水冲洗手或用肥皂洗手,然后用喷射烘干机或纸巾干燥。每个志愿者都将一只手依次放在不同的表面上,而他们的另一只手是用手套汁法取样的。从盥洗室空气中定量残留的细菌和病毒,表面拭子和手样本。
结果:P.对于所研究的任何干燥方法,在干燥手时,荧光素和MS2噬菌体很少被雾化。结果也显示有限,和类似的,将所研究的两种微生物转移到所有干燥方法的表面。
结论:在洗手间中干燥手时,使用喷射干燥机或纸巾会产生低水平的雾化。同样,所有干燥方法导致低转移到表面。虽然2019年冠状病毒病的大流行引发了人们对公共洗手间的担忧,这项研究表明,所有测试的方法都是干燥洗手的卫生解决方案。
BACKGROUND: In recent years, hand drying has been highlighted as a key step in appropriate hand hygiene, as moisture on hands can increase the transfer of micro-organisms from hands to surfaces and vice versa.
OBJECTIVE: To understand bacterial and viral
aerosolization following hand drying, and study the transfer of micro-organisms from hands to surfaces after drying using different methods.
METHODS: Groups of five volunteers had their hands pre-washed with soap, rinsed and dried, then inoculated with a concentrated mixture of Pseudomonas fluorescens and MS2 bacteriophage. Volunteers entered an empty washroom, one at a time, and rinsed their hands with water or washed their hands with soap prior to drying with a jet dryer or paper towels. Each volunteer applied one hand successively to various surfaces, while their other hand was sampled using the glove juice method. Both residual bacteria and viruses were quantified from the washroom air, surface swabs and hand samples.
RESULTS: P. fluorescens and MS2 bacteriophages were rarely aerosolized while drying hands for any of the drying methods studied. Results also showed limited, and similar, transfer of both micro-organisms studied on to surfaces for all drying methods.
CONCLUSIONS: The use of jet dryers or paper towels produces low levels of
aerosolization when drying hands in a washroom. Similarly, all drying methods result in low transfer to surfaces. While the coronavirus disease 2019 pandemic raised concerns regarding public washrooms, this study shows that all methods tested are hygienic solutions for dry washed hands.