Effectiveness of ceiling-mounted ultraviolet-C lamps: An experimental study in a biocontainment unit of a tertiary care hospital - 18/10/24
, Sung-Han Kim, MD a, b
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Résumé |
Background |
We aimed to evaluate the performance of ceiling-mounted UV-C lamps.
Methods |
This study was conducted in an empty room with UV-C lamps in the biocontainment unit of a tertiary care hospital in South Korea. Each pathogen (Staphylococcus aureus, Escherichia coli, Candida krusei, Bacillus cereus, and Mycobacterium peregrinum) was inoculated on blood agar plates and placed in 20 selected places from the UV-C lamp, and irradiation was applied for 15 min. As a control group, the bacterial solution was diluted 10,000 times and UV was not applied.
Results |
A mean ± SD of 5.95 ± 0.91 log reduction was observed with UV irradiation compared with the control. The log reduction was greatest for S. aureus [median, 7.05 (IQR, 6.49–7.26)] and least for M. peregrinum [median, 4.88 (IQR, 4.58–5.24)]. The degree of log reduction was inversely proportional to the square of the distance from the UV-C lamp (R2 = -0.12, P < .001).
Conclusions |
In this study, ceiling-mounted UV-C demonstrated effective disinfection of at least 4-log reduction of the test organisms within a 4-m distance. Mounted UV-C lighting is a considerable option for improving surface disinfection.
Le texte complet de cet article est disponible en PDF.Highlights |
• | Mounted ultraviolet (UV)-C lamps require no separate space and labor to transport. |
• | Mounted UV-C lamps were installed in patients’ rooms in the biocontainment units. |
• | Ceiling-mounted UV-C lamps demonstrated effective disinfection within 4 m. |
• | Mounted UV-C disinfection is simple and effective against various organisms. |
Key Words : UV-C, Disinfection, Surface disinfection, Terminal cleaning
Plan
| Conflicts of interest: None to report. |
Vol 52 - N° 11
P. 1302-1306 - novembre 2024 Retour au numéro
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