Methicillin-resistant Staphylococcus aureus contamination of hospital-use-only mobile phones and efficacy of 222-nm ultraviolet disinfection
Methicillin-resistant Staphylococcus aureus contamination of hospital-use-only mobile phones and efficacy of 222-nm ultraviolet disinfection
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DOI：
10.1016/j.ajic.2020.11.011
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发表时间：
2021-05-25
影响因子：
4.9
通讯作者：
Ohge, Hiroki
中科院分区：
文献类型：
--
作者：
Kaiki, Yuki;Kitagawa, Hiroki;Ohge, Hiroki
背景：手机可能被医院病原体污染，例如耐甲氧西林金黄色葡萄球菌（MRSA）。本研究的目的是调查医生医院专用手机的 MRSA 污染率以及 222 nm 紫外线 (UV) 消毒效果。方法：我们调查了医生医院专用手机的 MRSA 污染率，以及暴露于 222 nm 紫外线照射前后塑料板和手机上需氧菌 (AB) 的 MRSA 计数的减少情况。结果：调查的 50 部手机中有 5 部（10%）被 MRSA 污染。暴露于 0.1 mJ/cm(2) 222 nm UVC 照射 1.5 和 2.5 分钟（9 和 15 mJ/cm(2)）时，log(10) MRSA 菌落形成单位的平均 log(10) 分别减少了 2.91 和 3.95。暴露于 9 mJ/cm2 222 nm UVC 照射（0.1 mW/cm(2)，持续 1.5 分钟）可显着减少手机上的 AB 污染（P
Background: Mobile phones may be contaminated with nosocomial pathogens such as methicillin-resistant Staphylococcus aureus (MRSA). The aim of this study was to investigate the MRSA contamination rate on doctors' hospital-use-only mobile phones and the efficacy of 222-nm ultraviolet light (UV) disinfection.Methods: We investigated the MRSA contamination rate of doctors' hospital-use-only mobile phones, as well as the reduction in MRSA counts on plastic plates and aerobic bacteria (AB) on mobile phones before and after exposure to 222-nm UV irradiation.Results: Five (10%) of the 50 mobile phones investigated were contaminated with MRSA. Exposure to 0.1 mJ/cm(2) 222-nm UVC irradiation for 1.5 and 2.5 min (9 and 15 mJ/cm(2)) achieved mean log(10) MRSA colony-forming units reductions of 2.91 and 3.95, respectively. Exposure to 9 mJ/cm2 222-nm UVC irradiation (0.1 mW/cm(2) for 1.5 minutes) significantly reduced AB contamination on mobile phones (P