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Faecal Escherichia coli from patients with E. coli urinary tract infection and healthy controls who have never had a urinary tract infection

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@article{3356ab99f0e24cdba6d954f43c7ee021,
title = "Faecal Escherichia coli from patients with E. coli urinary tract infection and healthy controls who have never had a urinary tract infection",
abstract = "Urinary tract infections (UTIs) are primarily caused by Escherichia coli with the patient's own faecal flora acting as a reservoir for the infecting E. coli. Here we sought to characterize the E. coli faecal flora of UTI patients and healthy controls who had never had a UTI. Up to 20 E. coli colonies from each rectal swab were random amplified polymorphic DNA (RAPD) typed for clonality, dominance in the sample and correlation to the infecting UTI isolate in patients. Each distinct clone was phylotyped and tested for antimicrobial susceptibility. Eighty-seven per cent of the UTI patients carried the infecting strain in their faecal flora, and faecal clones causing UTI were more often dominant in the faecal flora. Patients had a larger diversity of E. coli in their gut flora by carrying more unique E. coli clones compared to controls, and patient faecal clones were more often associated with multidrug resistance compared to controls. We found a similar phylotype distribution of faecal clones from UTI patients and healthy controls, including a large proportion of B2 isolates in the control group. Faecal-UTI isolates from patients were more often associated with multidrug resistance compared to faecal-only clones, indicating a link between UTI virulence and antimicrobial resistance. Intake of any antibiotic less than 6 months prior to inclusion in the experiment occurred significantly more in patients with UTI than in controls. In contrast, presence of an intrauterine device was significantly more common in controls indicating a protective effect against UTI. In conclusion, healthy controls have a large proportion of potentially pathogenic E. coli phylotypes in their faecal flora without this causing infection.",
keywords = "Adult, Escherichia coli, Escherichia coli Infections, Feces, Female, Genetic Variation, Humans, Microbial Sensitivity Tests, Middle Aged, Molecular Typing, Random Amplified Polymorphic DNA Technique, Urinary Tract Infections",
author = "Nielsen, {Karen L} and Pia Dynesen and Preben Larsen and Niels Frimodt-M{\o}ller",
year = "2014",
month = apr,
doi = "10.1099/jmm.0.068783-0",
language = "English",
volume = "63",
pages = "582--9",
journal = "Journal of Medical Microbiology",
issn = "0022-2615",
publisher = "Society for General Microbiology",
number = "Pt 4",

}

RIS

TY - JOUR

T1 - Faecal Escherichia coli from patients with E. coli urinary tract infection and healthy controls who have never had a urinary tract infection

AU - Nielsen, Karen L

AU - Dynesen, Pia

AU - Larsen, Preben

AU - Frimodt-Møller, Niels

PY - 2014/4

Y1 - 2014/4

N2 - Urinary tract infections (UTIs) are primarily caused by Escherichia coli with the patient's own faecal flora acting as a reservoir for the infecting E. coli. Here we sought to characterize the E. coli faecal flora of UTI patients and healthy controls who had never had a UTI. Up to 20 E. coli colonies from each rectal swab were random amplified polymorphic DNA (RAPD) typed for clonality, dominance in the sample and correlation to the infecting UTI isolate in patients. Each distinct clone was phylotyped and tested for antimicrobial susceptibility. Eighty-seven per cent of the UTI patients carried the infecting strain in their faecal flora, and faecal clones causing UTI were more often dominant in the faecal flora. Patients had a larger diversity of E. coli in their gut flora by carrying more unique E. coli clones compared to controls, and patient faecal clones were more often associated with multidrug resistance compared to controls. We found a similar phylotype distribution of faecal clones from UTI patients and healthy controls, including a large proportion of B2 isolates in the control group. Faecal-UTI isolates from patients were more often associated with multidrug resistance compared to faecal-only clones, indicating a link between UTI virulence and antimicrobial resistance. Intake of any antibiotic less than 6 months prior to inclusion in the experiment occurred significantly more in patients with UTI than in controls. In contrast, presence of an intrauterine device was significantly more common in controls indicating a protective effect against UTI. In conclusion, healthy controls have a large proportion of potentially pathogenic E. coli phylotypes in their faecal flora without this causing infection.

AB - Urinary tract infections (UTIs) are primarily caused by Escherichia coli with the patient's own faecal flora acting as a reservoir for the infecting E. coli. Here we sought to characterize the E. coli faecal flora of UTI patients and healthy controls who had never had a UTI. Up to 20 E. coli colonies from each rectal swab were random amplified polymorphic DNA (RAPD) typed for clonality, dominance in the sample and correlation to the infecting UTI isolate in patients. Each distinct clone was phylotyped and tested for antimicrobial susceptibility. Eighty-seven per cent of the UTI patients carried the infecting strain in their faecal flora, and faecal clones causing UTI were more often dominant in the faecal flora. Patients had a larger diversity of E. coli in their gut flora by carrying more unique E. coli clones compared to controls, and patient faecal clones were more often associated with multidrug resistance compared to controls. We found a similar phylotype distribution of faecal clones from UTI patients and healthy controls, including a large proportion of B2 isolates in the control group. Faecal-UTI isolates from patients were more often associated with multidrug resistance compared to faecal-only clones, indicating a link between UTI virulence and antimicrobial resistance. Intake of any antibiotic less than 6 months prior to inclusion in the experiment occurred significantly more in patients with UTI than in controls. In contrast, presence of an intrauterine device was significantly more common in controls indicating a protective effect against UTI. In conclusion, healthy controls have a large proportion of potentially pathogenic E. coli phylotypes in their faecal flora without this causing infection.

KW - Adult

KW - Escherichia coli

KW - Escherichia coli Infections

KW - Feces

KW - Female

KW - Genetic Variation

KW - Humans

KW - Microbial Sensitivity Tests

KW - Middle Aged

KW - Molecular Typing

KW - Random Amplified Polymorphic DNA Technique

KW - Urinary Tract Infections

U2 - 10.1099/jmm.0.068783-0

DO - 10.1099/jmm.0.068783-0

M3 - Journal article

C2 - 24464694

VL - 63

SP - 582

EP - 589

JO - Journal of Medical Microbiology

JF - Journal of Medical Microbiology

SN - 0022-2615

IS - Pt 4

ER -

ID: 44853301