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Persistence of uropathogenic Escherichia Coli in the bladders of female patients with sterile urine after antibiotic therapies

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Abstract

This study aimed to provide evidence of persistent uropathogenic Escherichia coli (UPEC) in female patients with recurrent urinary tract infection (UTI) after antibiotic therapy. We collected biopsies of the bladder, and clean-catch urine samples from 32 women who had episodes of recurrent UTI and were given antibiotic therapy. Urine samples and biopsies were analyzed by conventional bacteriological techniques. Phylogenetic group and 16 virulence factors (VFs) of UPEC were determined using polymerase chain reaction (PCR). The infection capability of UPEC was confirmed in a mouse model. Immunofluorescence and electron microscopy were used to detect intracellular bacterial communities (IBCs) in the mouse model. The results showed that all urine specimens were detected sterile. E. coli was found in 6 of 32 biopsies (18.75%), and was identified to be UPEC by PCR. Different VFs associated with the formation of IBCs were identified in all six UPEC isolates. Each UPEC isolate was capable of forming IBCs within the bladder epithelial cells of mice. In conclusion, UPEC with distinctive pathological traits and the capability of IBC formation was first found in the bladders of women after antibiotic therapy, suggesting that the IBC pathogenic pathway may occur in humans and it plays an important role in UTI recurrence.

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Authors and Affiliations

  1. Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China

    Shu-cheng Liu  (刘述成), Xiao-min Han  (韩晓敏) & Zi-li Pang  (庞自力)

  2. Department of Urology, Nanhai Hospital, Southern Medical University, Foshan, 528000, China

    Ming Shi  (石 明)

Authors
  1. Shu-cheng Liu  (刘述成)
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  2. Xiao-min Han  (韩晓敏)
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  3. Ming Shi  (石 明)
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  4. Zi-li Pang  (庞自力)
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Corresponding author

Correspondence to Xiao-min Han  (韩晓敏).

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Liu, Sc., Han, Xm., Shi, M. et al. Persistence of uropathogenic Escherichia Coli in the bladders of female patients with sterile urine after antibiotic therapies. J. Huazhong Univ. Sci. Technol. [Med. Sci.] 36, 710–715 (2016). https://doi.org/10.1007/s11596-016-1649-9

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  • DOI: https://doi.org/10.1007/s11596-016-1649-9

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