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Prevalence and characterisation of class 1 and 2 integrons in multi-drug resistant Staphylococcus aureus isolates from pig farms in Chongqing, China

Chao Ye

Chao Ye

College of Animal Science and Technology, Southwest University, Beibei DistrictChongqing, China
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Ye, Chao
, 
Fengqing Hou

Fengqing Hou

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Hou, Fengqing
, 
Dongyi Xu

Dongyi Xu

College of Animal Science and Technology, Southwest University, Beibei DistrictChongqing, China
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Xu, Dongyi
, 
Qingyuan Huang

Qingyuan Huang

College of Animal Science and Technology, Southwest University, Beibei DistrictChongqing, China
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Huang, Qingyuan
, 
Xia Chen

Xia Chen

Animal Husbandry and Aquatic Products Station of Yubei DistrictChongqing, China
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Chen, Xia
, 
Zheng Zeng

Zheng Zeng

Chongqing Animal Disease Prevention and Control Center, Laboratory of Quality & Safety Risk Assessment for Animal Products on Biohazards, Ministry of AgricultureChongqing, China
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Zeng, Zheng
, 
Yuanyi Peng

Yuanyi Peng

College of Animal Science and Technology, Southwest University, Beibei DistrictChongqing, China
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Peng, Yuanyi
 und 
Rendong Fang

Rendong Fang

College of Animal Science and Technology, Southwest University, Beibei DistrictChongqing, China
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Fang, Rendong
  
16. Sept. 2020
Prevalence and characterisation of class 1 and 2 integrons in multi-drug resistant Staphylococcus aureus isolates from pig farms in Chongqing, China's Cover Image
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Online veröffentlicht: 16. Sept. 2020
Seitenbereich: 381 - 386
Eingereicht: 04. März 2020
Akzeptiert: 24. Aug. 2020
DOI: https://doi.org/10.2478/jvetres-2020-0061
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© 2020 C. Ye et al. published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Introduction

Integrons are mobile DNA elements that allow for acquisition and dissemination of antibiotic-resistance genes among pig farm-derived bacteria. Limited information is available on integrons of Staphylococcus aureus from pig farms. The aim of this study was to characterise and investigate the prevalence of class 1 and 2 integrons in multi-drug resistant (MDR) S. aureus isolates from pig farms.

Material and Methods

A total of 724 swabs were collected from 12 pig farms in Chongqing, China, and examined by conventional microbial and molecular methods.

Results

In total, 68 isolates were S. aureus, 57 of which were methicillin resistant (MRSA). All 68 isolates were MDR strains and carried integrons, of which 88.2% (60/68) harboured both class 1 and 2. In addition, 85.3% (58/68) of the class 2 integron-positive isolates carried the β-lactam resistance gene (blaTEM-1), and 66.7% (40/60) of the class 1 integron–positive isolates carried the aadA1c, aadA1 or dfrA1 gene for respective streptomycin and spectinomycin or trimethoprim resistance.

Conclusions

Class 1 and 2 integrons are common among the pig farm-derived S. aureus isolates. On account of their significance for public health, the prevalence of the integrons and their associated resistance genes in pig farm-derived S. aureus isolates should be paid special attention.

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Biologie, Molekularbiologie, Mikrobiologie und Virologie, Biologie, andere, Medizin, Veterinärmedizin
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