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Virulence Factors Predict Escherichia coli Colonization Patterns among Human and Animal Household Members

Andrew C. Murray, BS; Michael A. Kuskowski, PhD; and James R. Johnson, MD
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From Veterans Affairs Medical Center and University of Minnesota; Minneapolis, MN 55417.

Ann Intern Med. 2004;140(10):848-849. doi:10.7326/0003-4819-140-10-200405180-00032
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Pulsed-field gel electrophoresis (PFGE) profiles and colonization patterns ofEscherichia coliisolates from a man and woman and their pet cat.

Top. PFGE profiles. Lane numbers are shown below gel images. Lanes 1 through 10 are profiles of 9 of the 14 unique strains, with strain designations shown above gel lanes, plus subtype 1″ (lane 9). Lanes 11 through 16 are profiles of independent isolates of strain 1, as recovered from various anatomic sites from the woman (lanes 11–13), man (lanes 14 and 15), and cat (lane 16). Bottom. Distribution of 14 unique E. coli strains over time (week of sampling shown below grid), as recovered from various anatomic sites from the 3 household members. Black dots indicate that no sample was taken. Strains isolated more than once appear in colored boxes, with a unique color for each strain. Strains isolated only once appear in open boxes. Week 12, which coincided with symptoms of acute urinary tract infection (UTI) in the woman, yielded strain 1 from the woman's urine specimen (boldface-bordered box). There is no strain 7. NG = no growth.

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