How Does a Photocatalytic Antimicrobial Coating Affect Environmental Bioburden in Hospitals?
Authors
Reid, MatthewWhatley, Vanessa
Spooner, Emma
Nevill, Alan M.
Cooper, Michael
Ramsden, Jeremy J
Dancer, Stephanie J
Issue Date
2018-04
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BACKGROUND The healthcare environment is recognized as a source for healthcare-acquired infection. Because cleaning practices are often erratic and always intermittent, we hypothesize that continuously antimicrobial surfaces offer superior control of surface bioburden. OBJECTIVE To evaluate the impact of a photocatalytic antimicrobial coating at near-patient, high-touch sites in a hospital ward. SETTING The study took place in 2 acute-care wards in a large acute-care hospital. METHODS A titanium dioxide-based photocatalytic coating was sprayed onto 6 surfaces in a 4-bed bay in a ward and compared under normal illumination against the same surfaces in an untreated ward: right and left bed rails, bed control, bedside locker, overbed table, and bed footboard. Using standardized methods, the overall microbial burden and presence of an indicator pathogen (Staphylococcus aureus) were assessed biweekly for 12 weeks. RESULTS Treated surfaces demonstrated significantly lower microbial burden than control sites, and the difference increased between treated and untreated surfaces during the study. Hygiene failures (>2.5 colony-forming units [CFU]/cm2) increased 2.6% per day for control surfaces (odds ratio [OR], 1.026; 95% confidence interval [CI], 1.009-1.043; P=.003) but declined 2.5% per day for treated surfaces (OR, 0.95; 95% CI, 0.925-0.977; P<.001). We detected no significant difference between coated and control surfaces regarding S. aureus contamination. CONCLUSION Photocatalytic coatings reduced the bioburden of high-risk surfaces in the healthcare environment. Treated surfaces became steadily cleaner, while untreated surfaces accumulated bioburden. This evaluation encourages a larger-scale investigation to ascertain whether the observed environmental amelioration has an effect on healthcare-acquired infection. Infect Control Hosp Epidemiol 2018;39:398-404.Citation
Reid, M.J., Whatley, V., Spooner, E.C., Nevill, A.M., Cooper, M.C., Ramsden, J.J., & Dancer, S.J. (2018). 'How Does a Photocatalytic Antimicrobial Coating Affect Environmental Bioburden in Hospitals?'. Infection control and hospital epidemiology, 39 (4), pp 398-404 .Publisher
Cambridge University PressJournal
Infection control and hospital epidemiologyPubMed ID
29428003Type
Journal articleLanguage
enISSN
0899-823Xae974a485f413a2113503eed53cd6c53
10.1017/ice.2017.297
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Except where otherwise noted, this item's license is described as Archived with thanks to Infection control and hospital epidemiology
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