Establishment and Application of Rapid Detection Method for Polymyxin Resistance Gene mcr-1 Based on RPA-LFD Method

被引：0
|
作者：
Jiao X. [1 ]
Dong Y. [1 ]
Wang J. [1 ]
Lü C. [1 ]
Fang J. [1 ]
Jiang H. [1 ]
机构：
[1] Key Laboratory of Specialty Agri-products Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou
来源：
Science and Technology of Food Industry | 2023年 / 44卷 / 18期
关键词：
bacterial colistin resistance gene mcr-1; lateral flow dipstick; quantification; rapid detection; recombinase polymerase amplification; visualization;
D O I：
10.13386/j.issn1002-0306.2022120034
中图分类号：
学科分类号：
摘要：
Objective: To develop a rapid, efficient and visual method for the detection of bacterial colistin resistance gene mcr-1, so as to provide the basis and convenience for the development of its detection at the grassroots level. Methods: Using recombinase polymerase amplification combined with a lateral flow dipstick (RPA-LFD) assay, supplemented by a hand-held colloidal gold reader. According to the conserved sequence of the mcr-1 gene, a pair of specific RPA primers were designed and synthesized. Through the optimization of the reaction conditions and system, as well as the specificity test, sensitivity test, simulated food sample test and actual sample test, the RPA-LFD assay for visual and quantitative detection of bacterial colistin resistance gene mcr-1 was successfully established. Results: When the primer concentration was 400 nmol/L and the primer ratio was 1:1, the optimal reaction conditions of this method are Mg2+ concentration 14.0 mmol/L, reaction temperature 37 ℃ and reaction time 20 min. The sensitivity was good, the standard curve equation was y=0.117x+0.051, the quantification limit was 101~108 copies/μL, and the detection limit was 101 copies/μL, which was an order of magnitude lower than the PCR method and the detection result of the simulated sample was consistent with the PCR method. Carrying status of colistin resistance gene mcr-1 in each 15 pork samples, chicken samples, pig farm environmental samples, broiler farm environmental samples, Escherichia coli isolates and Enterobacter campylobacter isolates were analyzed by the established RPA-LFD assay. The detection rate of positive samples by RPA-LFD assay was consistent with that of conventional PCR method, and a total of 9 mcr-1 gene positive samples were detected. RPA-LFD quantitative analysis showed that the concentration of mcr-1 gene in positive samples was between 4.5×102~ 8.6×104 copies/μL. Conclition: The RPA-LFD detection method of the bacterial colistin resistance gene mcr-1 established in this study had strong specificity, high sensitivity, and simple operation, and could be widely used in grassroots inspections. © 2023 Chinese Journal of Geological Hazard and Control. All rights reserved.
引用
收藏
页码：209 / 216
页数：7
相关论文
共 37 条
  • [1] SALOME N, MARKUS H, VINCENT P, Et al., Extended-spectrum cephalosporin-resistant gram-negative organisms in livestock: An emerging problem for human health?[J], Drug Resistance Updates, 16, 1−2, (2013)
  • [2] PATERSON D., Resistance in gram-negative bacteria: Enterobacteriaceae, American Journal of Medicine, 119, pp. S20-S28, (2006)
  • [3] CHEN Y, ZHANG Y A, ZHOU Y., Research progress of bacteriophage in aquaculture[J], Journal of Fisheries of China, 45, 9, pp. 1605-1615, (2021)
  • [4] LI Y M, WANG S L., The impact of genetic and environmental regulation on theexpression of antibiotic resistance genes in Enterobacteriaceae [J], Chinese Journal of Biotechnology, 37, 4, (2021)
  • [5] WANG Y, ZHANG R, LI J, Et al., Comprehensive resistome analysis reveals the prevalence of NDM and MCR-1 in Chinese poultry production[J], Nature microbiology, 2, (2017)
  • [6] WANG X, WANG Y, ZHOU Y, Et al., Emergence of a novel mobile colistin resistance gene, mcr-8, in NDM-producing Klebsiella pneumoniae[J], Emerging Microbes & Infections, 7, 1, (2018)
  • [7] BOROWIAK M, BAUMANN B, FISHER J, Et al., Development of a novel mcr-6 to mcr-9 multiplex PCR and assessment of mcr-1 to mcr-9 occurrence in colistin-resistant Salmonella enterica isolates from environment, feed, animals and food (2011-2018) in Germany[J], Frontiers in Microbiology, 11, (2020)
  • [8] SUN H, ZHANG A C, GUO Y, Et al., Epidemiological investigation of colistin resistance gene mcr-1 in chickens from Jilin province[J], Chinese Journal of Veterinary Medicine, 56, 9, pp. 68-73, (2020)
  • [9] WANG X X, QU Z Z, CHANG W S, Et al., Dvances in research on polymyxin resistence mechanism mcr-1[J], Chinese Journal of Animal Infectious Diseases, 28, 2, pp. 110-114, (2020)
  • [10] MICHAELl R M, LAURA F M, JAMES R, Et al., Dissemination of the mcr-1 colistin resistance gene[J], The Lancet Infectious Diseases, 16, 3, (2016)
1234