Effectiveness of UV-C radiation in inactivation of microorganisms on materials with different surface structures.

IF 1.3 4区 医学 Q4 ENVIRONMENTAL SCIENCES Annals of Agricultural and Environmental Medicine Pub Date : 2024-06-27 Epub Date: 2024-06-25 DOI:10.26444/aaem/189695
Rafał L Górny, Małgorzata Gołofit-Szymczak, Andrzej Pawlak, Anna Ławniczek-Wałczyk, Marcin Cyprowski, Agata Stobnicka, Magdalena Płocińska, Joanna Kowalska
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Abstract

Introduction and objective: Ultraviolet light in the UV-C band is known as germicidal radiation and was widely used for both sterilization of the equipment and creation of a sterile environment. The aim of the study is to assess the effectiveness of inactivation of microorganisms deposited on surfaces with various textures by UV-C radiation disinfection devices.

Material and methods: Five microorganisms (3 bacteria, virus, and fungus) deposited on metal, plastic, and glass surfaces with smooth and rough textures were irradiated with UV-C light emitted by low-pressure mercury lamp and ultraviolet emitting diodes (LEDs), from a distance of 0.5 m, 1 m, and 1.5 m to check their survivability after 20-minute exposure.

Results and conclusions: Both tested UV-C sources were effective in inactivation of microorganisms; however, LED emitter was more efficient in this respect than the mercury lamp. The survival rate of microorganisms depended on the UV-C dose, conditioned by the distance from UV-C source being the highest at 0.5 m and the lowest at 1.5 m. For the tested microorganisms, the highest survival rate after UV-C irradiation was usually visible on glass and plastic surfaces. This observation should be considered in all environments where the type of material (from which the elements of technical equipment are manufactured and may be contaminated by specific activities) is important for maintaining the proper level of hygiene and avoiding the unwanted and uncontrolled spread of microbiological pollution.

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紫外线-C 辐射对不同表面结构材料上微生物的灭活效果。
导言和目的:紫外线-C 波段的紫外线被称为杀菌辐射,广泛用于设备消毒和创造无菌环境。本研究旨在评估紫外线-C 辐射消毒装置对沉积在不同质地表面的微生物的灭活效果:用低压汞灯和紫外线发光二极管(LED)发出的紫外线-C 光照射沉积在光滑和粗糙质地的金属、塑料和玻璃表面上的五种微生物(三种细菌、病毒和真菌),照射距离分别为 0.5 米、1 米和 1.5 米,以检测它们在 20 分钟照射后的存活率:测试的两种紫外线-C 光源都能有效灭活微生物,但 LED 发光器在这方面比汞灯更有效。微生物的存活率取决于紫外线-C 的剂量,距离紫外线-C 源 0.5 米处存活率最高,1.5 米处存活率最低。在所有环境中,材料的类型(技术设备元件的制造材料和可能受到特定活动污染的材料)对于保持适当的卫生水平和避免不必要的、不受控制的微生物污染扩散都很重要,因此应考虑到这一观察结果。
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来源期刊
Annals of Agricultural and Environmental Medicine
Annals of Agricultural and Environmental Medicine 医学-公共卫生、环境卫生与职业卫生
CiteScore
3.00
自引率
5.90%
发文量
58
审稿时长
4-8 weeks
期刊介绍: All papers within the scope indicated by the following sections of the journal may be submitted: Biological agents posing occupational risk in agriculture, forestry, food industry and wood industry and diseases caused by these agents (zoonoses, allergic and immunotoxic diseases). Health effects of chemical pollutants in agricultural areas , including occupational and non-occupational effects of agricultural chemicals (pesticides, fertilizers) and effects of industrial disposal (heavy metals, sulphur, etc.) contaminating the atmosphere, soil and water. Exposure to physical hazards associated with the use of machinery in agriculture and forestry: noise, vibration, dust. Prevention of occupational diseases in agriculture, forestry, food industry and wood industry. Work-related accidents and injuries in agriculture, forestry, food industry and wood industry: incidence, causes, social aspects and prevention. State of the health of rural communities depending on various factors: social factors, accessibility of medical care, etc.
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