Department of Infectious Diseases, Hiroshima University Hospital, Hiroshima, Japan; Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Hiroshima, Japan; Department of Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.
Department of Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.
Photodiagnosis Photodyn Ther. 2021 Jun;34:102334. doi: 10.1016/j.pdpdt.2021.102334. Epub 2021 May 7.
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 "Care222™," with a motion sensor, for removing bacterial contamination in a shared bathroom.
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.
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.
The automated 222-nm UVC disinfection device with a motion sensor significantly reduced AB surface contamination of a shared bathroom.
厕所表面会受到病原体污染，它们可能是疾病传播的媒介。在这项研究中，我们研究了一种带有运动传感器的自动 222nm 紫外线 C（UVC）消毒设备“Care222™”在共用浴室中去除细菌污染的效果。
两个自动 UVC 设备安装在两个浴室的天花板上，带有运动传感器，可自动关闭；UVC 设备的发射窗口在未处理的浴室中被覆盖。照射后，每天四个时间点从五个表面采集五个样本，检测需氧菌（AB）的菌落形成单位（CFU）。同时也测量了照射时间。
UVC 源的关闭时间在两个浴室之间没有显著差异。处理过的浴室和未处理的浴室之间的总 AB CFU 有显著差异。在处理过的浴室中，马桶座圈、电动马桶座圈控制面板和卫生纸架顶部的 AB 总数 CFU 明显低于对照组。处理过的浴室中 9:00、15:00 和 18:00 的 AB CFU 明显低于对照组。
带有运动传感器的自动 222nm UVC 消毒设备可显著减少共用浴室的 AB 表面污染。
