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Volume 13, Number 8—August 2007


Risk Factors for Colonization with Extended-Spectrum β-Lactamase–producing Bacteria and Intensive Care Unit Admission

Anthony D. Harris*†Comments to Author , Jessina C. McGregor*, Judith A. Johnson*†, Sandra M. Strauss*, Anita C. Moore*, Harold C. Standiford‡, Joan N. Hebden‡, and J. Glenn Morris*
Author affiliations: *University of Maryland, Baltimore, Maryland, USA; †Veterans Affairs Maryland Health Care System, Baltimore, Maryland, USA; ‡University of Maryland Medical Center, Baltimore, Maryland, USA;

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Table 3

History of culture positivity with antimicrobial drug–resistant bacteria among 117 patients colonized with ESBL-producing bacteria at ICU admission*

Drug-resistant bacteriaNo. ESBL colonized (%)
ESBL-positive clinical cultures before ICU admission†6 (5)
ESBL-positive clinical cultures after colonization29 (25)
Methicillin-resistant Staphylococcus aureus25 (21)
Vancomycin-resistant enterococci‡27 (23)

*ESBL, extended-spectrum β-lactamase; ICU, intensive care unit.
†Positive clinical cultures during the same hospital admission but before ICU admission.
‡Clinical or surveillance cultures at any time before ICU admission.

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