Description and results of a new method for assessing real-life performance of a UV-C disinfection robot

IF 1.8 Q3 INFECTIOUS DISEASES
Michael Rodgers, Suzan Cremers, Edmée Bowles
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引用次数: 0

Abstract

Background

Due to the disadvantages of manual disinfection of patient rooms, mobile disinfection robots using ultraviolet C (UV–C) radiation are increasingly being used. Assessing their in situ effectiveness remains challenging.

Aim

This study describes a new method to prove adequate in situ disinfection (≥5-log reduction in bacterial load), and uses this method to assess the efficacy of a mobile disinfection robot using UV-C radiation.

Methods

Agar plates serving as proxies for smooth surfaces in patient rooms were inoculated with bacterial suspension and placed on various surfaces in a patient room. After irradiation by an automated mobile UV-C robot, reduction in colony growth was determined by comparing the irradiated plates to a reference series of non-irradiated plates, enabling the evaluation of whether an adequate reduction in colony-forming units (CFU's) of ≥5-log was reached on these irradiated surfaces.

Findings

The new technique described here proved a successful method for demonstrating an in situ ≥5-log reduction in CFU's for five different bacterial pathogens. Of the 32 plates placed on UV-accessible surfaces, 31 showed an adequate reduction in CFU's of ≥5-log. One plate could not be assessed.

Conclusion

Inoculated agar plates placed in patient rooms before irradiation and subsequently compared to a reference series can be used to assess in situ efficacy of mobile disinfection robots using UV-C radiation. Our findings support the idea that UV-C robots, used adjunctively to conventional manual washing and disinfection, may achieve adequate bacterial load reduction on UV-accessible smooth surfaces in patient rooms for a selected subset of pathogens.

一种评估UV-C消毒机器人实际性能的新方法的描述和结果
由于人工消毒病房的缺点,使用紫外线C (UV-C)辐射的移动消毒机器人越来越多地被使用。评估它们的原位有效性仍然具有挑战性。目的本研究描述了一种新的方法来证明充分的原位消毒(细菌负荷减少≥5对数),并利用该方法评估了使用UV-C辐射的移动消毒机器人的效果。方法用细菌悬浮液接种sagar平板,作为病房表面光滑的代表,放置在病房的不同表面上。在自动移动UV-C机器人照射后,通过将辐照板与参考系列未辐照板进行比较来确定菌落生长的减少,从而评估这些辐照表面是否达到了≥5-log的菌落形成单位(CFU)的充分减少。研究结果:本文描述的新技术证明了一种成功的方法,可以证明五种不同细菌病原体的CFU原位降低≥5对数。在放置在紫外线可及表面的32个板中,31个显示CFU的充分降低≥5-log。一个盘子无法评估。结论在照射前将接种过的琼脂平板放置于病房,并与参考系列进行比较,可用于评估移动消毒机器人使用UV-C辐射的原位效果。我们的研究结果支持这样一种观点,即UV-C机器人作为传统人工洗涤和消毒的辅助工具,可以在病房中紫外线可及的光滑表面上达到足够的细菌负荷减少,以清除选定的病原体子集。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Infection Prevention in Practice
Infection Prevention in Practice Medicine-Public Health, Environmental and Occupational Health
CiteScore
4.80
自引率
0.00%
发文量
58
审稿时长
61 days
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