Acta Veterinaria et Zootechnica Sinica ›› 2020, Vol. 51 ›› Issue (12): 3193-3198.doi: 10.11843/j.issn.0366-6964.2020.12.029

• RESEARCH NOTES • Previous Articles     Next Articles

Development and Application of Multiplex PCR Method for the Drug Resistance Genes Detection in Avian Pathogenic Escherichia coli

ZHANG Yaodong, ZHU Hong, AFAYIBO Dossêh Jean Apôtre, WANG Yao, YI Zhengfei, XIN Suhua, TAO Chenglin, LI Tao, QI Jingjing, TIAN Mingxing, DING Chan, YU Shengqing*, WANG Shaohui*   

  1. Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China
  • Received:2020-05-06 Online:2020-12-25 Published:2020-12-23

Abstract: To detect the drug resistance genes, the multiplex PCR method for drug resistance genes of β-lactams, tetracyclines, aminoglycosides, amphenicols, and sulfonamides were developed. Based on the sequences of drug resistance genes from GenBank, 17 pairs of specific primers were designed. Then, 4 multiple PCR assays were established through the optimization of PCR reaction conditions and primers concentrations (cat+floR+tetB+tetC; dfrA12+sul2+sul1+blaCTX-M+balTEM-1; aac3+aph3+aadA1+strB; tetA+cmlA+strA+sul3). The sensitivity and specificity of these assays were determined. The multiplex PCR assays were used to detect the drug resistance genes of 42 avian pathogenic Escherichia coli (APEC). The drug sensitivity of these APEC strains were also determined, which were compared to the distributions of drug resistance genes in these strains. The results showed that the 17 drug resistance genes were effectively and specifically amplified in these 4 optimized multiplex PCR assays. The detection limits of the 4 multiplex PCR were 103, 104, 104 and 105CFU of bacteria, respectively. The established multiplex PCR assays are specific and rapid for the detection of drug resistance genes in APEC strains, which showed 92.86% coincident with the drug resistance for these strains. The developed 4 multiplex PCR are simple and rapid assays for drug resistance genes detection, which can be used for the epidemiologic study for drug resistance genes.

Key words: drug resistance gene, multiplex PCR, detection

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