Methicillin-resistant Staphylococcus aureus contamination of hospital-use-only mobile phones and efficacy of 222-nm ultraviolet disinfection - 25/05/21
, Toshinori Hara, MT c, d, Toshihito Nomura, MD, PhD b, Keitaro Omori, MD, PhD b, Norifumi Shigemoto, MD, PhD a, b, c, e, Shinya Takahashi, MD, PhD a, Hiroki Ohge, MD, PhD b, cHighlights |
• | Shared devices may become contaminated with nosocomial pathogens in hospitals. |
• | Five (10%) of the 50 mobile phones investigated here were contaminated with MRSA. |
• | 222-nm UV disinfection is safe and effectively reduced MRSA CFUs in vitro. |
• | 222-nm UV disinfection reduced aerobic bacterial contamination of mobile phones. |
Résumé |
Background |
Mobile phones may be contaminated with nosocomial pathogens such as methicillin-resistant Staphylococcus aureus (MRSA). The aim of this study was to investigate the MRSA contamination rate on doctors’ hospital-use-only mobile phones and the efficacy of 222-nm ultraviolet light (UV) disinfection.
Methods |
We investigated the MRSA contamination rate of doctors’ hospital-use-only mobile phones, as well as the reduction in MRSA counts on plastic plates and aerobic bacteria (AB) on mobile phones before and after exposure to 222-nm UV irradiation.
Results |
Five (10%) of the 50 mobile phones investigated were contaminated with MRSA. Exposure to 0.1 mJ/cm2 222-nm UVC irradiation for 1.5 and 2.5 min (9 and 15 mJ/cm2) achieved mean log10 MRSA colony-forming units reductions of 2.91 and 3.95, respectively. Exposure to 9 mJ/cm2 222-nm UVC irradiation (0.1 mW/cm2 for 1.5 minutes) significantly reduced AB contamination on mobile phones (P < .001).
Conclusions |
The use of 222-nm UV disinfection resulted in effective in vitro reduction of MRSA and significantly reduced AB contamination of mobile phone surfaces.
Le texte complet de cet article est disponible en PDF.Key Words : Ultraviolet light, Antibiotic resistance, Infection control, Health care–associated infection, Bacterial contamination
Plan
| Conflicts of interest: There are no conflicts of interest to declare. |
Vol 49 - N° 6
P. 800-803 - juin 2021 Retour au numéro
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