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Quantifying the relative effect of environmental contamination on surgical ward MRSA incidence: An exploratory analysis

Lee, Xing J.; Pettitt, Anthony N.; Dancer, Stephanie J.

Authors

Xing J. Lee

Anthony N. Pettitt



Abstract

Background: To investigate and quantify the contribution of environmental contamination towards methicillin-resistant Staphylococcus aureus (MRSA) incidence observed in a hospital ward using stochastic modelling. Methods: A non-homogeneous Poisson process model was developed to investigate the relationship between environmental contamination and MRSA incidence in a UK surgical ward during a cleaning intervention study. The model quantified the fractional risks (FRs) from colonised patients, environmental contamination and a generic background source as a measure of their relative importance in describing the observed MRSA incidence. Results: While the background source remained the most likely MRSA acquisition source for this ward (as measured by the FRs), environmental contamination was the second most likely source, ahead of colonised patients in the ward. The relative importance of environmental contamination was smaller in the enhanced cleaning period compared with the normal cleaning period, albeit with notable variability in the estimates.

Citation

Lee, X. J., Pettitt, A. N., & Dancer, S. J. (2018). Quantifying the relative effect of environmental contamination on surgical ward MRSA incidence: An exploratory analysis. Infection, Disease & Health, https://doi.org/10.1016/j.idh.2018.02.005

Journal Article Type Article
Acceptance Date Feb 12, 2018
Online Publication Date Mar 31, 2018
Publication Date Mar 31, 2018
Deposit Date Apr 11, 2018
Publicly Available Date Mar 28, 2024
Journal Infection, Disease & Health
Print ISSN 2468-0451
Publisher Elsevier
Peer Reviewed Peer Reviewed
DOI https://doi.org/10.1016/j.idh.2018.02.005
Keywords Health facility environment; Methicillin-resistant Staphylococcus aureus; Stochastic processes
Public URL http://researchrepository.napier.ac.uk/Output/1149555

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