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Are hygiene standards useful in assessing infection risk?

White, Liza F. and Dancer, Stephanie J. and Robertson, Chris and McDonald, John and , National Health Service (Funder) (2008) Are hygiene standards useful in assessing infection risk? American Journal of Infection Control, 36 (5). pp. 381-384. ISSN 0196-6553

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    We monitored the surface level cleanliness of a five-bedded surgical intensive care unit (SICU) over a ten-week period in order to evaluate proposed hygiene standards.Ten environmental sites within SICU were sampled twice weekly along with collection of clinical and patient activity data. The standards designate aerobic colony counts (ACCs) >2.5cfu/cm2 from hand-touch sites and the presence of Staphylococcus aureus as hygiene failures. Nearly a quarter of 200 samples failed the standards, mostly from hand-touch sites on curtains, beds and medical equipment. The total number of fails each week was associated with bed occupancy (p=0.04), trending towards association with SICU-acquired infections (p=0.11). Environmental S.aureus was associated with the proportion of beds occupied (p = 0.02). Indistinguishable genotypes were found between patient and environmental staphylococci, with timescales supporting staphylococcal transmission in both directions. Hygiene standards based on microbial growth levels and the presence of S.aureus reflect patient activity and provide a means to risk manage infection. They also exposed a staphylococcal reservoir that could represent a more tangible risk to patients. Standards for surface level cleanliness deserve further evaluation.

    Item type: Article
    ID code: 15069
    Keywords: hospital cleaning, clinical environment, staphylococci, hospital-acquired infection, intensive care unit running head, hygiene standards and infection risk, Mathematics, Infectious Diseases, Public Health, Environmental and Occupational Health, Epidemiology, Health Policy
    Subjects: Science > Mathematics
    Department: Faculty of Science > Mathematics and Statistics
    Professional Services > Corporate Services Directorate
    Related URLs:
    Depositing user: Mrs Ann Lynch
    Date Deposited: 28 Jan 2010 14:29
    Last modified: 05 Sep 2014 13:05

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