John E Zeber1,2, John D Coppin1, Frank C Villamaria1, Marjory D Williams1,3, Laurel A Copeland4, Piyali Chatterjee1,5, Hosoon Choi1,5, Chetan Jinadatha5,6. 1. Department of Research, Central Texas Veterans Healthcare System, Temple, Texas, USA. 2. University of Massachusetts Amherst School of Public Health & Health Science, Amherst, Massachusetts, USA. 3. Department of Nursing, Central Texas Veterans Health Care System, Temple, Texas, USA. 4. VA Central Western Massachusetts Healthcare System, Leeds, Massachusetts, USA. 5. Department of Medicine, College of Medicine, Texas A&M Health Science Center, Bryan, Texas, USA. 6. Department of Medicine, Central Texas Veterans Health Care System, Temple, Texas, USA.
Abstract
BACKGROUND: The reduction in microbial bioburden achieved by terminal disinfection in a hospital may vary considerably by type of disinfectant or cleaner and by environmental service (EVS) personnel. This study estimated whether supplemental ultraviolet (UV) irradiation after disinfection or cleaning reduced bioburden and whether the supplemental effect persisted after adjusting for disinfectant or cleaner type and EVS personnel. METHODS: Environmental samples for aerobic bacterial colonies (ABC) and methicillin-resistant Staphylococcus aureus (MRSA) were obtained from 5 high-touch surfaces in patient rooms at 3 time points: before manual cleaning, after manual cleaning using 1 of 3 disinfectants or 1 cleaner, and after UV irradiation. RESULTS: For ABC, the model-estimated mean (95% uncertainty interval) counts were 56% (48%-63%) lower for postmanual + UV compared with manual clean alone, and for MRSA they were 93% (62%-99%) lower for postmanual + UV vs manual clean alone. CONCLUSIONS: Although UV supplementation provides incremental benefit in bioburden reduction across all cleaners or disinfectants tested, it provides the greatest benefit when supplementing cleaners or disinfectants with the lowest disinfection properties. UV irradiation provides additional bioburden reduction to manual cleaning or disinfection, even when accounting for variability introduced by different disinfectants and EVS personnel. Published by Oxford University Press on behalf of Infectious Diseases Society of America 2019.
BACKGROUND: The reduction in microbial bioburden achieved by terminal disinfection in a hospital may vary considerably by type of disinfectant or cleaner and by environmental service (EVS) personnel. This study estimated whether supplemental ultraviolet (UV) irradiation after disinfection or cleaning reduced bioburden and whether the supplemental effect persisted after adjusting for disinfectant or cleaner type and EVS personnel. METHODS: Environmental samples for aerobic bacterial colonies (ABC) and methicillin-resistant Staphylococcus aureus (MRSA) were obtained from 5 high-touch surfaces in patient rooms at 3 time points: before manual cleaning, after manual cleaning using 1 of 3 disinfectants or 1 cleaner, and after UV irradiation. RESULTS: For ABC, the model-estimated mean (95% uncertainty interval) counts were 56% (48%-63%) lower for postmanual + UV compared with manual clean alone, and for MRSA they were 93% (62%-99%) lower for postmanual + UV vs manual clean alone. CONCLUSIONS: Although UV supplementation provides incremental benefit in bioburden reduction across all cleaners or disinfectants tested, it provides the greatest benefit when supplementing cleaners or disinfectants with the lowest disinfection properties. UV irradiation provides additional bioburden reduction to manual cleaning or disinfection, even when accounting for variability introduced by different disinfectants and EVS personnel. Published by Oxford University Press on behalf of Infectious Diseases Society of America 2019.
Entities:
Keywords:
health care–associated infections; no-touch disinfection technology; ultraviolet light
Authors: John E Zeber; Christopher Pfeiffer; John W Baddley; Jose Cadena-Zuluaga; Eileen M Stock; Laurel A Copeland; Janet Hendricks; Jwan Mohammadi; Marcos I Restrepo; Chetan Jinadatha Journal: Am J Infect Control Date: 2018-04-11 Impact factor: 2.918
Authors: Dubert M Guerrero; Philip C Carling; Lucy A Jury; Suresh Ponnada; Michelle M Nerandzic; Curtis J Donskey Journal: Infect Control Hosp Epidemiol Date: 2013-05 Impact factor: 3.254
Authors: Chetan Jinadatha; Ricardo Quezada; Thomas W Huber; Jason B Williams; John E Zeber; Laurel A Copeland Journal: BMC Infect Dis Date: 2014-04-07 Impact factor: 3.090