A Sensitive and Accurate Recombinase Polymerase Amplification Assay for Detection of the Primary Bacterial Pathogens Causing Bovine Respiratory Disease

Frontiers in Veterinary Science

Tim McAllister¹  Cheyenne C. Conrad¹  Rahat Zaheer¹  Trevor Alexander¹  Brenda Ralston²  Shaun Cook³  Kim Stanford³  Rana K. Daher⁴  Maurice Boissinot⁴  Michel G. Bergeron⁴  Yan D. Niu⁵  Kingsley K. Amoako⁶ 

[1] Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB, Canada;Alberta Agriculture and Forestry, Airdrie, AB, Canada;Alberta Agriculture and Forestry, Lethbridge, AB, Canada;Centre de Recherche en Infectiologie de l'Université Laval, Québec City, QC, Canada;Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada;National Centre for Animal Disease, Canadian Food Inspection Agency, Lethbridge, AB, Canada;

关键词: recombinase polymerase amplification;    bovine respiratory disease;    antimicrobial resistance;    integrative conjugative element;    competitive internal amplification;   

DOI  :  10.3389/fvets.2020.00208

来源: DOAJ

【 摘 要 】

Rapid and accurate diagnosis of bovine respiratory disease (BRD) presents a substantial challenge to the North American cattle industry. Here we utilize recombinase polymerase amplification (RPA), a fast and sensitive isothermal DNA-based technology for the detection of four BRD pathogens (Mannheimia haemolytica, Pasteurella multocida, Histophilus somni, Mycoplasma bovis), genes coding antimicrobial resistance (AMR) and integrative conjugative elements (ICE) which can harbor AMR genes. Eleven RPA assays were designed and validated including: a) one conventional species-specific multiplex assay targeting the 4 BRD pathogens, b) two species-specific real-time multiplex RPA assays targeting M. haemolytica/M. bovis and P. multocida/H. somni, respectively with a novel competitive internal amplification control, c) seven conventional assays targeting AMR genes (tetH, tetR, msrE, mphE, sul2, floR, erm42), and d) one real-time assay targeting ICE. Each real-time RPA assay was tested on 100 deep nasopharyngeal swabs (DNPS) collected from feedlot cattle previously assessed for targets using either culture methods and/or polymerase chain reaction (PCR) verification (TC-PCR). The developed RPA assays enabled sensitive and accurate identification of BRD agents and AMR/ICE genes directly from DNPS, in a shorter period than TC-PCR, showing considerable promise as a tool for point-of-care identification of BRD pathogens and antimicrobial resistance genes.

【 授权许可】

Unknown