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A Study of the Relationship Between Environmental Contamination with Methicillin‐Resistant Staphylococcus Aureus (MRSA) and Patients' Acquisition of MRSA
Katherine J. Hardy , PhD, MSc, BSc, Beryl A. Oppenheim , MBBCh, FRCPath, Savita Gossain , BSc, MBBS, MRCPath, Fang Gao , MB, BS, FRCA, MPhil and Peter M. Hawkey , BSc, DSc, MBBS, MD, FRCPath
Infection Control and Hospital Epidemiology
Vol. 27, No. 2 (February 2006), pp. 127-132
Published by: Cambridge University Press on behalf of The Society for Healthcare Epidemiology of America
Stable URL: http://www.jstor.org/stable/10.1086/500622
Page Count: 6
You can always find the topics here!Topics: Staphylococcus aureus, Intensive care units, Environmental health, Cleaning, Hospital beds, Gels, Electrophoresis, Broths, Microbial colonization
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Objective. The study aimed to examine the presence of methicillin‐resistant Staphylococcus aureus (MRSA) in the environment and its relationship to patients' acquisition of MRSA. Design. A prospective study was conducted in a 9‐bed intensive care unit for 14 months. At every environmental screening, samples were obtained from the same 4 sites in each bed space. Patients were screened at admission and then 3 times weekly. All environmental and patient strains were typed using pulsed‐field gel electrophoresis. Results. MRSA was isolated from the environment at every environmental screening, when both small and large numbers of patients were colonized. Detailed epidemiological typing of 250 environmental and 139 patient isolates revealed 14 different pulsed‐field gel electrophoresis profiles, with variants of EMRSA‐15 being the predominant type. On only 20 (35.7%) of 56 occasions were the strains isolated from the patients and the strains isolated from their immediate environment indistinguishable. There was strong evidence to suggest that 3 of 26 patients who acquired MRSA while in the intensive care unit acquired MRSA from the environment. Conclusions. This study reveals widespread contamination of the hospital environment with MRSA, highlights the complexities of the problem of contamination, and confirms the need for more‐effective cleaning of the hospital environment to eliminate MRSA.
© 2006 by The Society for Healthcare Epidemiology of America. All rights reserved.