کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6128856 | 1222142 | 2016 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Intrapopulation variability in mutator prevalence among urinary tract infection isolates of Escherichia coli
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
ایمنی شناسی و میکروب شناسی
میکروب شناسی
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چکیده انگلیسی
Bacteria with elevated mutation rates represent a risk factor for treatment failure and are often found with high frequency in clinical isolates from different sources. How this frequency reflects the among-population and within-population proportion of hypermutators is unknown, despite its importance to the choice of antibiotic therapies that minimize the likelihood of resistance development. Here we screened for hypermutators among the urine of 80 patients with urinary tract infections, at an unprecedented resolution of 24 isolates per sample. We found hypermutators in four patients (5%), at frequencies ranging from 4.2% to 62.5%. Molecular characterization revealed alterations in the oxidized guanine (GO) and methly-directed mistmatch repair (MMR) systems as the genetic basis of hypermutability. These observations suggest that mutators may be present in more patients than previously anticipated, at frequencies that are difficult to detect but still sufficient to impact on adaptation to antibiotics or the host environment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Clinical Microbiology and Infection - Volume 22, Issue 6, June 2016, Pages 566.e1-566.e7
Journal: Clinical Microbiology and Infection - Volume 22, Issue 6, June 2016, Pages 566.e1-566.e7
نویسندگان
A. Couce, N. Alonso-Rodriguez, C. Costas, A. Oliver, J. Blázquez,