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Long-Term Escherichia coli Asymptomatic Bacteriuria among Women with Diabetes Mellitus
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Long-Term Escherichia coli Asymptomatic Bacteriuria among Women with Diabetes Mellitus
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Long-Term Escherichia coli Asymptomatic Bacteriuria among Women with Diabetes Mellitus
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Journal Article
Long-Term Escherichia coli Asymptomatic Bacteriuria among Women with Diabetes Mellitus
2009
Overview
Background. Persistent Escherichia coli asymptomatic bacteriuria (ASB) is common among persons with diabetes mellitus, but the duration of colonization and the rates of recolonization are unknown. We estimated the duration of colonization and the rate of recolonization among successively isolated E. coli from diabetic women with ASB and compared the virulence profiles with uropathogenic and commensal E. coli. Methods. A total of 105 women with diabetes were enrolled in a randomized, controlled clinical trial for treatment of ASB in Manitoba, Canada, and were observed at least every 3 months for up to 3 years. We analyzed 517 isolates from 70 women with repeated E. coli ASB for genetic similarity using enterobacterial repetitive intergenic consensus polymerase chain reaction. Unique strains were screened for uropathogenic virulence characteristics using dot blot hybridization and compared with different collections of E. coli isolates. Results. On average, differences were found among women assigned to treatment for ASB, those treated only for symptomatic infections, and untreated women in (1) follow-up time with bacteriuria (29%, 31%, and 66%, respectively; P<.001), (2) duration of bacteriuria (2.2, 2.5, and 3.7 months, respectively; P=.04), and (3) carriage of unique isolates (2.4, 2.8, and 4 months, respectively; P=.03). Women assigned to antibiotic treatment usually had recurrent infection (76%), 64% of the time with a genetically new E. coli strain. Virulence characteristics of these isolates were comparable to those of fecal isolates from healthy women. Conclusions. Treatment may reduce the overall proportion of time infected in the long term and carriage of a unique strain, but most treatment regimens were followed by subsequent recolonization. Infecting strains did not have virulence factors characteristic of uropathogenic E. coli.
Publisher
The University of Chicago Press,University of Chicago Press,Oxford University Press
Subject
/ Anti-Bacterial Agents - therapeutic use
/ Bacterial diseases of the urinary system
/ Bacterial Typing Techniques - methods
/ Biological and medical sciences
/ Diabetes
/ Diabetes. Impaired glucose tolerance
/ DNA Fingerprinting - methods
/ E coli
/ Endocrine pancreas. Apud cells (diseases)
/ Escherichia coli - classification
/ Escherichia coli - isolation & purification
/ Escherichia coli - pathogenicity
/ Escherichia coli Infections - drug therapy
/ Escherichia coli Infections - epidemiology
/ Escherichia coli Infections - microbiology
/ Escherichia coli Proteins - genetics
/ Etiopathogenesis. Screening. Investigations. Target tissue resistance
/ Female
/ Genotype
/ Humans
/ Random Amplified Polymorphic DNA Technique
/ Virulence Factors - genetics
/ Women
