Pilot study on the decontamination efficacy of an installed 222-nm ultraviolet disinfection device (Care222TM), with a motion sensor, in a shared bathroom
Pilot study on the decontamination efficacy of an installed 222-nm ultraviolet disinfection device (Care222TM), with a motion sensor, in a shared bathroom
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DOI：
10.1016/j.pdpdt.2021.102334
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发表时间：
2021-05-21
影响因子：
3.3
通讯作者：
Ohge, Hiroki
中科院分区：
文献类型：
--
作者：
Kitagawa, Hiroki;Kaiki, Yuki;Ohge, Hiroki
背景：厕所表面被病原体污染，可能是疾病传播的媒介。在这项研究中，我们研究了带有运动传感器的自动 222 纳米紫外线 C (UVC) 消毒设备“Care222TM”在去除共用浴室中的细菌污染方面的功效。方法：两个由运动传感器停用的自动 UVC 设备安装在两间浴室的天花板上； UVC 装置的发射窗被覆盖在未经处理的浴室中。照射后，在 5 天的时间内每天四个时间点从五个表面采集样本，并测定需氧细菌 (AB) 的菌落形成单位 (CFU)。还测量了照射时间。结果：不同浴室的 UVC 源停用时间没有显着差异。经处理和未经处理的浴室之间的总 AB CFU 存在显着差异。在经过处理的浴室中，马桶座圈AB、电动马桶座圈控制面板和卫生纸架顶部的CFU显着低于对照。处理浴室中 9:00、15:00 和 18:00 时 AB 的 CFU 显着低于对照。结论：带有运动传感器的自动化 222 nm UVC 消毒设备显着减少了共用浴室的 AB 表面污染。
Background: Toilet surfaces are contaminated with pathogens, and they may be a vector for disease transmission. In this study, we investigated the efficacy of an automated 222-nm ultraviolet C (UVC) disinfection device "Care222TM," with a motion sensor, for removing bacterial contamination in a shared bathroom. Methods: Two automated UVC devices, deactivated by motion sensors, were mounted on the ceiling of two bathrooms; the emission window of the UVC device was covered in the non-treated bathroom. After irradiation, samples were collected from five surfaces at four time points/day for 5 days, and colony-forming units (CFUs) of aerobic bacteria (AB) were determined. The irradiation time was also measured. Results: UVC source deactivation time did not significantly differ between the bathrooms. There was a significant difference in the total AB CFUs between the treated and non-treated bathrooms. In the treated bathroom, the CFUs of AB of the toilet seat, control panel of the electric toilet seat, and top of the toilet paper holder were significantly lower than those of the control. The CFUs of AB at 9:00, 15:00, and 18:00 h in the treated bathroom were significantly lower than those of the control. Conclusions: The automated 222-nm UVC disinfection device with a motion sensor significantly reduced AB surface contamination of a shared bathroom.