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Infection Control and Hospital Epidemiology Publication Info

Article DOI: 10.1086/502045
Stable URL: http://www.jstor.org/stable/10.1086/502045
Extended‐Spectrum ß‐Lactamase–Producing Escherichia coli and Klebsiella Species: Risk Factors for Colonization and Impact of Antimicrobial Formulary Interventions on Colonization Prevalence  • 
Gregory Bisson , MD, Neil O. Fishman , MD, Jean Baldus Patel , PhD, Paul H. Edelstein , MD and Ebbing Lautenbach , MD, MPH
Infection Control and Hospital Epidemiology , Vol. 23, No. 5 (May 2002), pp. 254-260
Article DOI: 10.1086/502045
Article Stable URL: http://www.jstor.org/stable/10.1086/502045
Original Articles

Extended‐Spectrum ß‐Lactamase–Producing Escherichia coli and Klebsiella Species: Risk Factors for Colonization and Impact of Antimicrobial Formulary Interventions on Colonization Prevalence

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Abstract(back to top)

OBJECTIVE. The incidence of extended‐spectrum ß‐lactamase (ESßL)–mediated resistance has increased markedly during the past decade. Risk factors for colonization with ESßL‐producing Escherichia coli and Klebsiella species (ESßL‐EK) remain unclear, as do methods to control their further emergence.

DESIGN. Case–control study.

SETTING. Two hospitals within a large academic health system: a 725‐bed academic tertiary‐care medical center and a 344‐bed urban community hospital.

PATIENTS. Thirteen patients with ESßL‐EK fecal colonization were compared with 46 randomly selected noncolonized controls.

RESULTS. Duration of hospitalization was the only independent risk factor for ESßL‐EK colonization (odds ratio, 1.11; 95% confidence interval, 1.02 to 1.21). Of note, 8 (62%) of the patients had been admitted from another healthcare facility. In addition, there was evidence for dissemination of a single K. oxytoca clone. Finally, the prevalence of ESßL‐EK colonization decreased from 7.9% to 5.7% following restriction of third‐generation cephalosporins (P = .51).

CONCLUSIONS. ESßL‐EK colonization was associated only with duration of hospitalization and there was no significant reduction following antimicrobial formulary interventions. The evidence for nosocomial spread and the high percentage of patients with ESßL‐EK admitted from other sites suggest that greater emphasis must be placed on controlling the spread of such organisms within and between institutions.

Bibliographic Information(back to top)

  • Extended‐Spectrum ß‐Lactamase–Producing Escherichia coli and Klebsiella Species: Risk Factors for Colonization and Impact of Antimicrobial Formulary Interventions on Colonization Prevalence
  • Gregory Bisson , MD, Neil O. Fishman , MD, Jean Baldus Patel , PhD, Paul H. Edelstein , MD and Ebbing Lautenbach , MD, MPH
  • Infection Control and Hospital Epidemiology
  • Vol. 23, No. 5 (May 2002) (pp. 254-260)

Author Information(back to top)

Gregory Bisson , MD; Neil O. Fishman , MD; Jean Baldus Patel , PhD; Paul H. Edelstein , MD; Ebbing Lautenbach , MD, MPH

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Notes

Drs. Bisson, Fishman, and Lautenbach are from the Division of Infectious Diseases, Department of Medicine; Drs. Patel and Edelstein are from the Department of Pathology and Laboratory Medicine; and Dr. Lautenbach is also from the Department of Biostatistics and Epidemiology, the Center for Clinical Epidemiology and Biostatistics, and the University of Pennsylvania Center for Education and Research on Therapeutics (CERTs), University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania. Address reprint requests to Ebbing Lautenbach, MD, MPH, University of Pennsylvania School of Medicine, Center for Clinical Epidemiology and Biostatistics, 825 Blockley Hall, 423 Guardian Drive, Philadelphia, PA 19104‐6021. Presented in part at the 4th Decennial International Conference on Nosocomial and Healthcare‐Associated Infections; March 5‐9, 2000; Atlanta, GA.

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© 2002 by The Society for Healthcare Epidemiology of America. All rights reserved.