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Submitted: 06 May 2017
Revision: 14 May 2017
Accepted: 17 Jul 2017
ePublished: 31 Aug 2017
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Avicenna J Clin Microbiol Infect. 2017;4(3): 12653.
doi: 10.5812/ajcmi.12653
  Abstract View: 1188
  PDF Download: 612

Research Article

Correlation of Escherichia coli Strains Isolated from Wild Bird Feces and Human Urinary Tract Infections from Phylogenetic Point of View

Hamid Staji 1*, Elham Shahaboddin 2, Khatereh Kafshdouzan 1

1 Department of Pathobiology, Faculty of Veterinary Medicine, Semnan University, Semnan, Iran
2 Graduated Student in DVM Degree, Faculty of Veterinary Medicine, Semnan University, Semnan, Iran
*Corresponding Author: Corresponding author: Hamid Staji, Department of Pathobiology, Faculty of Veterinary Medicine, Semnan University, Semnan, Iran. Fax: +98-2333654215, Email: hstaji@semnan.ac.ir

Abstract

Background: Escherichia coliis a typical occupant of the enteric system of vertebrates. Some E. coli strains are related to urinary tract infections (UTIs) in human. E. coli strains are divided namely to the four phylogenetic groups, A, B1, B2, and D. Some investigations have indicated the relationship between phylogenetic characteristics and pathogenicity of E. coli. Thus, determining the phylogeny of unknown E. coli strains may be useful in predicting the pathogenesis.

Objectives: In the present study, we aimed to compare the distribution of E. coli phylogroups in human UTIs and wild bird feces as a possible source of infection for human in a cross-sectional survey.

Methods: A total of 264 E. coli isolates were obtained from human UTIs and feces of wild birds around and phylogenetic determination was carried out using the Clermont Triplex-PCR technique.

Results: Our results showed that phylogenetic group B2 strains were the most prevalent in UTI cases (47.2%) followed by group D (30.2%). Group B1 contained 32.5% of the isolates in feces of wild birds, followed by group A (27.5%). There was a significant difference in E. coli phylogeny between hosts so that groups B2 and D were more prevalent in human UTIs and groups B1 and A in wild birds. Also, when comparing the phylogroups within a host, group B1 showed a higher rate in wild birds than in human UTIs.

Conclusions: Although the majority of isolates from wild birds belonged to nonpathogenic phylogenetic groups B1 and A, further research seems to necessary to assess the exact relation of wild birds as pathogen sources for human by genotyping E. coli strains via high throughput genotyping assays.


Copyright © 2017, Avicenna Journal of Clinical Microbiology and Infection. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.
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