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Pulsed-field gel electrophoresis fingerprinting of Campylobacter jejuni and Campylobacter coli strains isolated from clinical specimens, Iran

  • Mahdi Ghorbanalizadgan
  • Bita BakhshiEmail author
  • Saeed Shams
  • Shahin Najar-Peerayeh
Original Article
  • 3 Downloads

Abstract

The aim of this study was to determine the clonal correlation of Campylobacter strains isolated from diarrheal children under 5 years of age in Iran using the PFGE method and to determine the antimicrobial susceptibility and virulence gene content of strains. Of 750 patients with bacterial diarrhea, 33 (4%) Campylobacter spp., including 31 C. jejuni (94%) and 2 C. coli (6%), were isolated during 18-month period in Tehran, Iran. Except for one strain, remaining Campylobacter strains were positive for the flaA gene. A complete set of cytolethal distending toxin (CDT) encoding genes (cdtABC) were detected in 52% of the C. jejuni strains, while the 2 C. coli isolates under study only harbored cdtA and cdtB of the CDT cluster. All strains were resistant to at least three antibiotic classes. Resistance to ampicillin among C. coli and C. jejuni strains was 100% and 84%, respectively, and 80% of all strains were susceptible to gentamicin. PFGE genotyping generated 19 pulsotypes with two major clusters, displaying the maximum and minimum similarity of 100% and 26%, respectively. The C. coli strains showed clearly distinct pulsotypes and each fell within separate clusters. A very homogeneous Campylobacter population was detected among Iranian patients with 33 % of strains showing identical banding patterns and no clear correlation was observed between antibiotic resistance profiles and PFGE patterns of the isolates.

Keywords

Campylobacter Antibiotic resistance PFGE cdtABC fla

Notes

Funding information

The authors would like to thank the Research Council of the Tarbiat Modares University for the financial support of the study.

Compliance with ethical standards

Study ethics

The study was reviewed and approved by Medical Ethics Committee of the Tarbiat Modares University (Code: IR.MODARES.REC) before it began. The written informed consent was provided by participants in order to join in this study.

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Bacteriology, Faculty of Medical SciencesTarbiat Modares UniversityTehranIran
  2. 2.Cellular and Molecular Research CenterQom University of Medical SciencesQomIran

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