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

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• 作者：Shu-cheng Liu 刘述成 ; Xiao-min Han 韩晓敏…
• 关键词：urinary tract infection ; intracellular bacterial communities ; uropathogenic Escherichia coli ; persistence
• 刊名：Journal of Huazhong University of Science and Technology [Medical Sciences]
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：36
• 期：5
• 页码：710-715
• 全文大小：5,132 KB
• 刊物主题：Medicine/Public Health, general;
• 出版者：Springer Berlin Heidelberg
• ISSN：1993-1352
• 卷排序：36

文摘

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.