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  • Title: Epidemiological tracing of Escherichia coli by O antigen typing in a geriatric ward.
    Author: Larsson P, Andersson HE, Norlén B.
    Journal: Scand J Infect Dis; 1981; 13(3):185-90. PubMed ID: 7031857.
    Abstract:
    The nosocomial spread of Escherichia coli in a geriatric ward was analyzed with sampling at intervals of 2 weeks for 1 year. Specimens were obtained from patients, staff, and hospital environment and 5 239 E. coli colonies were O grouped into 49 O antigens. About 29% of the patients acquired bacteriuria during the hospitalization. In 75% of the bacteriuric strains the same O antigen was found in urinary and faecal samples from the same or the previous sampling round. Nosocomial spread of E. coli could be shown. Cross-infection as well as auto-infection were considered to be the modes of spread.
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