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Methicillin-resistant Staphylococcus aureus contamination of hospital-use-only mobile phones and efficacy of 222-nm ultraviolet disinfection.

Abstract：

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.

journal_name

Am J Infect Control

journal_title

American journal of infection control

authors

Kaiki Y,Kitagawa H,Hara T,Nomura T,Omori K,Shigemoto N,Takahashi S,Ohge H

doi

10.1016/j.ajic.2020.11.011

subject

Has Abstract

pub_date

2020-11-10 00:00:00

eissn

0196-6553

issn

1527-3296

pii

S0196-6553(20)30993-7

pub_type

杂志文章

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