Prevalence and antimicrobial resistance profiles of Escherichia coli isolated from free-range pigs

E. coli from free-ranging pigs

  • Hongna Zhang Hebei University of Economics and Business, Shijiazhuang, China
  • Xiaonan Zhao Shandong Agricultural University, Tai'an, China
  • Xuepeng Wang Shandong Agricultural University, Tai'an, China
  • Weishan Chang Shandong Agricultural University, Tai'an, China

Abstract

Introduction: Numerous studies about antimicrobial resistant Escherichia coli (E. coli) of animal origins have been conducted around the world, most of them focus on bacteria from animals raised in intensive breeding farms, but systematic studies on antimicrobial resistance in E. coli of free range animals are still lacking.


Methodology: This study aimed to investigate the prevalence and antimicrobial resistance profiles of E. coli from free-range pigs in Laiwu mountainous areas, eastern China.


Results: Among 123 fecal samples, 123 non-duplicate E. coli were obtained with an isolation rate of 100.0% (123/123). These E. coli showed the highest resistance rate to tetracycline (77/123, 62.6%), but all were sensitive to amoxicillin/clavulanic acid. Thirty-eight E. coli (38/123, 30.9%) showed multidrug resistance (MDR). Among 123 E. coli isolates, only 39 carried antimicrobial resistant genes detected in this study. Of these 39 isolates, blaTEM-1, blaCTX-M-14, blaCTX-M-15, qnrB, qnrD, qnrS1, floR and cfr genes were detected in 13, 9, 4, 7, 10, 7, 20, and 7 isolates, respectively. blaTEM-1 and blaCTX-M-14 genes were concomitantly detected in 6 isolates, and blaTEM, qnrB, qnrS and qnrD genes were concomitantly detected in 7 isolates.


Conclusions: Free-ranging pigs may be regarded as a potential reservoir for antibiotic resistant genes.

Author Biographies

Hongna Zhang, Hebei University of Economics and Business, Shijiazhuang, China

Department of Teaching Affairs

Xiaonan Zhao, Shandong Agricultural University, Tai'an, China

College of Animal Science and Technology

Xuepeng Wang, Shandong Agricultural University, Tai'an, China

College of Animal Science and Technology

Weishan Chang, Shandong Agricultural University, Tai'an, China

College of Animal Science and Technology

Published
2017-09-05
How to Cite
Zhang H, Zhao X, Wang X, Chang W (2017) Prevalence and antimicrobial resistance profiles of Escherichia coli isolated from free-range pigs. The Journal Of Infection In Developing Countries 11 (08): 652-655. https://doi.org/10.3855/jidc.9269
Section
Brief Original Articles

Keywords

Free-ranging pig; Escherichia coli; Antibiotics sensitivity; Resistance gene