UVGI Safety

Kowalski, Władysław

doi:10.1007/978-3-642-01999-9_12

Cited by 6 publications

(2 citation statements)

References 15 publications

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“…Areas not achieving a germicidal dose could be re‐treated after repositioning the sanitizer, or by using a medical‐grade handheld UV wand (particularly in drill holes and crevices). Data from applications in industry such as food science and medical sanitization have demonstrated that surface topography and reflectance can redirect UV wavelengths to indentations or other “shadowed” areas resulting in the reduction of microbial populations in areas out of the direct line of light (Boyce et al, 2016; Dancer, 2016; Kowalski, 2009; Lindblad et al, 2020). The depth of organic matter on hibernaculum walls may also impact treatment effectiveness.…”

Section: Discussionmentioning

confidence: 99%

Whole‐room ultraviolet sanitization as a method for the site‐level treatment ofPseudogymnoascus destructans

Kwait

Kerwin

Herzog

et al. 2022

Conservat Sci and Prac

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White-nose syndrome (WNS), a catastrophic fungal disease of hibernating bats, is perpetuated by environmental reservoirs of the fungal pathogen, Pseudogymnoascus destructans. Surviving bats clear infection each summer but are re-infected upon return to the hibernaculum. Therefore, addressing environmental reservoirs is critical for managing WNS. Ultraviolet (UV) light is known to kill P. destructans in the lab, and whole-room UV sanitization is a common practice in many commercial settings. However, effective UV treatment at the hibernaculum scale has yet to be confirmed. Importantly, existing standard practices likely require modification for implementation in hibernation sites. Prior to field testing, confirming the ability of UV sanitizers to treat the complex topography of hibernacula, as well as quantifying the effects of such topography on effective treatment times is necessary. Here we use a laboratory setting to investigate the feasibility of whole-room UV-C sanitization in treating environmental reservoirs of P. destructans. All trials resulted in mean fungal reductions of 97.3% (range: 91.9-99.7%) relative to controls. To prepare for future implementation within a hibernaculum, we quantified the effect of distance, emission angle, and incidence angle on UV-C irradiance delivered to target locations. From these data, we calculated treatment times required for killing P. destructans at the scale of a natural setting. Measurable UV-C irradiance extended to a maximum distance of 21.3 m. Angles of emission and incidence both reduced irradiance; however, we conclude that ~325 m 3 of surface volume could be treated in <2 h. Taken together, UV-C sanitization may provide a feasible, scalable, and relatively ecologically benign method of reducing P. destructans populations.

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Section: Discussionmentioning

confidence: 99%

Whole‐room ultraviolet sanitization as a method for the site‐level treatment ofPseudogymnoascus destructans

Kwait

Kerwin

Herzog

et al. 2022

Conservat Sci and Prac

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“…Although dosage susceptibility varies among microorganisms, this dosage is potentially enough for a 1-2 log reduction of Staphylococcus aereus. 2,10 This factor may explain why some dosimeters displayed 0 mJ/cm 2 despite direct, albeit angled or distant, exposure to the UV-C source. Last, other autonomous UV-C emitters may use other placement methods which likely produce different results.…”

Section: Discussionmentioning

confidence: 99%

Comparing UV-C dosages of emitter placement strategies in a community hospital setting

Haag

Holliday

Archulet

et al. 2022

Infect. Control Hosp. Epidemiol.

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Role of Ultraviolet Disinfection in the Prevention of Surgical Site Infections

Simmons

Dale

Holt

et al. 2017

Advances in Experimental Medicine and Biology

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The role of the environment in surgical site infections is surprisingly understudied. UV disinfection holds promise for reducing the level of contamination in operating rooms and thereby lowering the risk of infection for patients. Issues such as the frequency, amount and locations for UV disinfection to have an impact on the risk of surgical site infection are recently emerging in the literature. As technologies and knowledge improve, UV disinfection will have a role to play in operating rooms in the future.

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UVGI Safety

Cited by 6 publications

References 15 publications

Whole‐room ultraviolet sanitization as a method for the site‐level treatment ofPseudogymnoascus destructans

Whole‐room ultraviolet sanitization as a method for the site‐level treatment ofPseudogymnoascus destructans

Comparing UV-C dosages of emitter placement strategies in a community hospital setting

Role of Ultraviolet Disinfection in the Prevention of Surgical Site Infections

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