Effect of pulsed xenon ultraviolet disinfection on methicillin-resistant Staphylococcus aureus contamination of high-touch surfaces in a Japanese hospital.

Hiroki Kitagawa, Minako Mori, Seiya Kashiyama, Yayoi Sasabe, Kiyoko Ukon, Naomi Shimokawa, Nobuaki Shime, Hiroki Ohge

American journal of infection control 2020 Feb

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The hospital environment is an important source of multidrug-resistant organisms such as methicillin-resistant Staphylococcus aureus (MRSA). Here, we evaluated the efficacy of pulsed xenon ultraviolet (PX-UV) disinfection in addition to manual cleaning in a Japanese hospital. Environmental samples were collected from inpatient rooms that had been occupied for at least 48 hours by patients infected or colonized with MRSA. High-touch surfaces from 11 rooms were sampled before and after manual cleaning and then after PX-UV disinfection. Changes in bacterial counts and in the number of aerobic bacteria (AB)- and MRSA-positive samples between sampling points were assessed. The time taken to complete PX-UV treatment of patient rooms was also recorded. A total of 306 samples were collected. PX-UV disinfection resulted in a significant decrease in abundance of AB and MRSA (mean colony-forming units 14.4 ± 38.7 to 1.7 ± 6.1, P < .001 and 1.1 ± 3.9 to 0.3 ± 2.0, P < .001, respectively) and in the number of AB- and MRSA-positive samples (58.8%-28.4%, P = .001 and 19.6%-3.9%, P < .001, respectively) compared with manual cleaning. The median time of in-room use of the PX-UV device was 20 minutes. The addition of PX-UV disinfection to the manual cleaning process significantly reduced AB and MRSA contamination of high-touch surfaces in hospital inpatient rooms. Copyright © 2019 Association for Professionals in Infection Control and Epidemiology, Inc. Published by Elsevier Inc. All rights reserved.

Citation

Hiroki Kitagawa, Minako Mori, Seiya Kashiyama, Yayoi Sasabe, Kiyoko Ukon, Naomi Shimokawa, Nobuaki Shime, Hiroki Ohge. Effect of pulsed xenon ultraviolet disinfection on methicillin-resistant Staphylococcus aureus contamination of high-touch surfaces in a Japanese hospital. American journal of infection control. 2020 Feb;48(2):139-142