Różańska Anna, Pioskowik Anna, Herrles Laura, Datta Tanisha, Krzyściak Paweł, Jachowicz-Matczak Estera, Siewierski Tomasz, Walkowicz Monika, Chmielarczyk Agnieszka
Department of Microbiology, Faculty of Medicine, Jagiellonian University Medical College, 31-008 Kraków, Poland.
Students' Scientific Group of Microbiology, Faculty of Medicine, Jagiellonian University Medical College, 31-008 Kraków, Poland.
Microorganisms. 2025 Apr 25;13(5):986. doi: 10.3390/microorganisms13050986.
(CD) is a Gram-positive, spore-forming anaerobic bacterium, usually transmitted through the fecal-oral route, that can result from direct person-to-person contact, exposure to contaminated environmental surfaces, or contact with the hands of colonized healthcare personnel. An increased number of infections, especially healthcare-associated, with this etiology has been observed in most countries. As a spore-forming organism, CD is resistant to alcohol formulations and is a challenge for chemical disinfection. The solution could be the supplementation of traditional disinfection with non-touch techniques, such as UV-C radiation. The adoption of UV-C as a supplementary disinfection method in hospitals has significantly increased since the COVID-19 pandemic. However, there are no current guidelines concerning the use of UV-C disinfection in hospitals. The aim of this study was to evaluate the effectiveness of UV-C irradiation in inactivating from different types of surfaces in hospital settings. The study was based on laboratory tests evaluating the efficacy in eliminating three different strains on carriers made of plastic, metal and glass after 10 min exposure to UV-C (wavelength, 253.7 nm). We observed a wide range of reductions in the suspensions depending on the density of the carrier contamination, type of carrier, strains and the location of the carrier. The percentage reductions ranged from 0 to 100%, but the best results were observed for glass, with lower initial suspension density and carrier placement on a door frame. Statistically significant differences were only seen in different suspension densities. Our experiment was a continuation of the tests done for non-sporing bacteria and , and there were some interesting differences in reflecting its biology, especially its sensitivity to an aerobic atmosphere during the sample drying. Although the elimination of by UV-C radiation was confirmed in our experiment, it was lower than in the case of non-spore-forming bacteria. Thus, this method may be used in healthcare settings (hospitals) for improving environmental safety and preventing spreading.
艰难梭菌是一种革兰氏阳性、产芽孢的厌氧菌,通常通过粪-口途径传播,可因直接人际接触、接触受污染的环境表面或接触定植有该菌的医护人员的手而感染。在大多数国家,已观察到由这种病原体引起的感染数量增加,尤其是医疗保健相关感染。作为一种产芽孢的生物体,艰难梭菌对酒精制剂具有抗性,对化学消毒构成挑战。解决方案可能是采用非接触技术(如紫外线C辐射)来补充传统消毒。自新冠疫情以来,医院采用紫外线C作为补充消毒方法的情况显著增加。然而,目前尚无关于医院使用紫外线C消毒的指南。本研究的目的是评估紫外线C照射对医院环境中不同类型表面上艰难梭菌的灭活效果。该研究基于实验室测试,评估在紫外线C(波长253.7纳米)照射10分钟后,在塑料、金属和玻璃制成的载体上消除三种不同艰难梭菌菌株的效果。我们观察到,根据载体污染密度、载体类型、菌株和载体位置的不同,艰难梭菌悬浮液的减少幅度差异很大。减少百分比范围为0%至100%,但玻璃载体在初始悬浮液密度较低且放置在门框上时效果最佳。仅在不同悬浮液密度之间观察到统计学上的显著差异。我们的实验是对非芽孢形成细菌的测试的延续,在艰难梭菌方面存在一些有趣的差异,反映了其生物学特性,特别是在样品干燥过程中对需氧气氛的敏感性。尽管我们的实验证实了紫外线C辐射可消除艰难梭菌,但低于非芽孢形成细菌的情况。因此,该方法可用于医疗保健场所(医院),以提高环境安全性并防止艰难梭菌传播。