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Antimicrobial Agents and Chemotherapy, November 2006, p. 3939-3943, Vol. 50, No. 11
0066-4804/06/$08.00+0     doi:10.1128/AAC.00503-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

Duration of Outpatient Fecal Colonization Due to Escherichia coli Isolates with Decreased Susceptibility to Fluoroquinolones: Longitudinal Study of Patients Recently Discharged from the Hospital{triangledown}

Ebbing Lautenbach,1,2,3,4* Pam Tolomeo,3 Xiangqun Mao,5 Neil O. Fishman,1,4 Joshua P. Metlay,2,3,4,6,7 Warren B. Bilker,2,3,4 and Irving Nachamkin5

Divisions of Infectious Diseases,1 General Internal Medicine of the Department of Medicine,6 Department of Biostatistics and Epidemiology,2 Department of Pathology and Laboratory Medicine,5 Center for Clinical Epidemiology and Biostatistics,3 Center for Education and Research on Therapeutics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania,4 Department of Veterans Affairs, Philadelphia, Pennsylvania7

Received 23 April 2006/ Returned for modification 18 July 2006/ Accepted 5 September 2006

Among 10 subjects colonized with Escherichia coli isolates with reduced susceptibility to fluoroquinolones, the median duration of colonization following hospital discharge was 80 days (range, 8 to 172 days). Colonization was longer for isolates demonstrating organic-solvent tolerance than for isolates that were not organic-solvent tolerant (151 versus 29 days, respectively; P = 0.07) but was not associated with other resistance mechanisms, demographics, or antibiotic use.

* Corresponding author. Mailing address: University of Pennsylvania School of Medicine, Center for Clinical Epidemiology and Biostatistics, 825 Blockley Hall, 423 Guardian Drive, Philadelphia, PA 19104-6021. Phone: (215) 898-6977. Fax: (215) 573-5315. E-mail: elautenb{at}cceb.med.upenn.edu.

{triangledown} Published ahead of print on 18 September 2006.

Antimicrobial Agents and Chemotherapy, November 2006, p. 3939-3943, Vol. 50, No. 11
0066-4804/06/$08.00+0     doi:10.1128/AAC.00503-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.





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