Fluoroquinolone-resistant Escherichia coli Carriage in Long-Term Care Facility
Published Date:Jun 2005
Source:Emerg Infect Dis. 11(6):889-894.
Aged, 80 And Over
Colony Count, Microbial
Drug Resistance, Bacterial
Escherichia Coli Infections
Keywords: Molecular Epidemiology
Long Term Care
Microbial Sensitivity Tests
Description:We conducted a cross-sectional study to determine the prevalence of, and risk factors for, colonization with fluoroquinolone (FQ)-resistant Escherichia coli in residents in a long-term care facility. FQ-resistant E. coli were identified from rectal swabs for 25 (51%) of 49 participants at study entry. On multivariable analyses, prior FQ use was the only independent risk factor for FQ-resistant E. coli carriage and was consistent for FQ exposures in the previous 3, 6, 9, or 12 months. Pulsed-field gel electrophoresis of FQ-resistant E. coli identified clonal spread of 1 strain among 16 residents. Loss (6 residents) or acquisition (7 residents) of FQ-resistant E. coli was documented and was associated with de novo colonization with genetically distinct strains. Unlike the case in the hospital setting, FQ-resistant E. coli carriage in long-term care facilities is associated with clonal spread.
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