Microbiological comparison of hand-drying methods: the potential for contamination of the environment, user, and bystander
Microbiological comparison of hand-drying methods: the potential for contamination of the environment, user, and bystander
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DOI：
10.1016/j.jhin.2014.08.002
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发表时间：
2014-12-01
影响因子：
6.9
通讯作者：
Wilcox, M. H.
中科院分区：
文献类型：
--
作者：
Best, E. L.;Parnell, P.;Wilcox, M. H.
背景资料：干手的效率在防止病原体传播方面很重要，但关于哪种干手方法对环境和使用者的污染贡献最小的知识是有限的。目的：比较三种常见干手方法的倾向（喷射空气、暖空气干燥器和纸巾）来污染环境、使用者和旁观者。将手涂在乳酸杆菌中以模拟洗涤不良、污染的手，并干燥。调查包括120个空气取样测试（60个测试和60个控制），分为接近和1米接近干燥过程。结果：在接近手干燥的空气细菌计数为喷气式空气干燥器（70.7 cfu）高4.5倍，比暖空气干燥器（15.7 cfu）（P = 0.001），27倍，比使用纸巾（2.6 cfu）（P < 0.001）。在使用毛巾干燥与暖风干燥器期间，空气传播计数也有显著差异（P = 0.001）。在1米远的地方观察到类似的细菌计数模式。可视化实验表明，喷射空气干燥器造成最小的液滴dispersion.Conclusion：喷射空气和温暖的空气干燥器的结果增加细菌气溶胶干燥手时。这些结果表明，空气干燥器可能不适合在医疗机构中使用，因为它们可能通过空气传播到环境或浴室访客中促进微生物交叉污染。(C)2014年，卫生保健感染协会。由爱思唯尔有限公司出版。保留所有权利。
Background: The efficiency of hand drying is important in preventing pathogen spread, but knowledge surrounding which drying methods contribute least towards contamination of the environment and users is limited.Aim: To compare the propensity of three common hand-drying methods (jet air, warm air dryers, and paper towels) to contaminate the environment, users, and bystanders.Methods: Hands were coated in lactobacilli to simulate poorly washed, contaminated hands, and dried. The investigation comprised 120 air-sampling tests (60 tests and 60 controls), divided into close and 1 m proximity from the drying process. Separate tests used hands coated in paint to visualize droplet dispersal.Findings: Air bacterial counts in close proximity to hand drying were 4.5-fold higher for the jet air dryer (70.7 cfu) compared with the warm air dryer (15.7 cfu) (P = 0.001), and 27-fold higher compared with use of paper towels (2.6 cfu) (P < 0.001). Airborne counts were also significantly different during use of towel drying versus warm air dryer (P = 0.001). A similar pattern was seen for bacterial counts at 1 m away. Visualization experiments demonstrated that the jet air dryer caused the most droplet dispersal.Conclusion: Jet air and warm air dryers result in increased bacterial aerosolization when drying hands. These results suggest that air dryers may be unsuitable for use in healthcare settings, as they may facilitate microbial cross-contamination via airborne dissemination to the environment or bathroom visitors. (C) 2014 The Healthcare Infection Society. Published by Elsevier Ltd. All rights reserved.