Dongyi Xu
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
Dongyi Xu has a total of 9 co-authors. Here are the top co-authors by number of shared publications:
- Chao Ye
Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
1 shared publication - Dong-Liang Hu
Department of Zoonoses, Kitasato University School of Veterinary Medicine, Towada 034-8628, Japan
1 shared publication Fengqing Hou
Joint International Research Laboratory of Animal Health and Animal Food Safety, College of Veterinary Medicine, Southwest University, Chongqing, China
1 shared publication- Jing Chen
Chongqing Key Laboratory of Micro&Nano Structure Optoelectronics, School of Physical Science and Technology
1 shared publication - Rendong Fang
Joint International Research Laboratory of Animal Health and Animal Food Safety, College of Veterinary Medicine, Southwest University, Chongqing, China
1 shared publication - Yu Wang
Shanghai Key Laboratory of Agricultural Genetics and Breeding Biotechnology Research, Institute of Shanghai Academy of Agricultural Sciences Shanghai 201106 China
1 shared publication
Latest Publications
- 1 October 2021
- Published by SAGE Publications in Foodborne Pathogens and Disease
- Vol. 18 (10) , 712-717
Antimicrobial Resistance and Molecular Characterization of Class 1 Integron in Salmonella Isolates Recovered from Pig Farms in Chongqing, China
Salmonella is considered one of the leading causes for foodborne diseases in humans. Pork and its products contaminated with Salmonella are increasingly recognized as an important source of human salmonellosis. The aim of this study was to investigate the antimicrobial resistance and prevalence of integrons in Salmonella isolates from pig farms. In total, 92 of 724 (12.7%) samples were Salmonella-positive, including 64 (15.0%) from fecal samples, 27 (12.6%) from floor samples, 1 (4.5%) from water samples, and 0 from feed and air samples. These isolates showed the highest resistance to tetracycline (85.9%), followed by trimethoprim (67.4%), ampicillin (60.9%), and chloramphenicol (51.1%). In addition, 51 isolates carried the complete class 1 integron, most of which (42/51) harbored antibiotic resistance cassettes. A total of six gene cassettes including orfF, est-X, dfrA1+aadA1, aadA1, dfrA12+aadA2, and sat were identified, in which the most prevalent one was orfF (29.4%). Furthermore, all 19 class 1 integron-positive isolates harboring dfr genes showed resistance to trimethoprim (SXT), suggesting that the trimethoprim resistance gene (dfr) may contribute to the emergence of SXT resistance phenotype. Therefore, considering the significance of integrons and related resistance genes for public health, special measures should be taken to control Salmonella spp. on the pig farms and to prevent spread of integrons and associated resistance genes.
- 1 October 2021
- Published by SAGE Publications in Foodborne Pathogens and Disease
- Vol. 18 (10) , 712-717
Antimicrobial Resistance and Molecular Characterization of Class 1 Integron in Salmonella Isolates Recovered from Pig Farms in Chongqing, China
Salmonella is considered one of the leading causes for foodborne diseases in humans. Pork and its products contaminated with Salmonella are increasingly recognized as an important source of human salmonellosis. The aim of this study was to investigate the antimicrobial resistance and prevalence of integrons in Salmonella isolates from pig farms. In total, 92 of 724 (12.7%) samples were Salmonella-positive, including 64 (15.0%) from fecal samples, 27 (12.6%) from floor samples, 1 (4.5%) from water samples, and 0 from feed and air samples. These isolates showed the highest resistance to tetracycline (85.9%), followed by trimethoprim (67.4%), ampicillin (60.9%), and chloramphenicol (51.1%). In addition, 51 isolates carried the complete class 1 integron, most of which (42/51) harbored antibiotic resistance cassettes. A total of six gene cassettes including orfF, est-X, dfrA1+aadA1, aadA1, dfrA12+aadA2, and sat were identified, in which the most prevalent one was orfF (29.4%). Furthermore, all 19 class 1 integron-positive isolates harboring dfr genes showed resistance to trimethoprim (SXT), suggesting that the trimethoprim resistance gene (dfr) may contribute to the emergence of SXT resistance phenotype. Therefore, considering the significance of integrons and related resistance genes for public health, special measures should be taken to control Salmonella spp. on the pig farms and to prevent spread of integrons and associated resistance genes.