Rapid and sensitive detection of porcine torovirus by a reverse transcription loop-mediated isothermal amplification assay (RT-LAMP)

J Virol Methods. 2016 Feb:228:103-7. doi: 10.1016/j.jviromet.2015.11.009. Epub 2015 Nov 22.

Abstract

Porcine torovirus (PToV) is associated with swine gastroenteritis, but its pathogenesis is uncertain because there is limited information regarding PToV due to its difficulty to adapt in vitro. This study has developed a rapid one-step reverse transcription loop-mediated isothermal amplification (RT-LAMP) method for the detection of PToV. A set of four primers specific to six regions within the PToV's highly conserved fragment of the M gene was designed for use with the RT-LAMP assay. The RT-LAMP assay was sensitive with a detection limit of 1 × 10(1)copies/μL, which was 100-fold higher than reverse-transcription PCR. No cross-reaction was observed with other similar viruses. A total of 175 clinical specimens were collected from the Sichuan province, and PToV was detected by the established RT-LAMP assay with a positive rate of 39.2% (69/175). This study developed the first rapid, sensitive, simple, cost-effective and accurate method for the detection of PToV. The results show that the RT-LAMP assay is highly feasible in clinical settings.

Keywords: Porcine torovirus; Rapid detection; Reverse transcription loop-mediated isothermal amplification assay.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cross Reactions
  • DNA Primers
  • Humans
  • Limit of Detection
  • Nucleic Acid Amplification Techniques / economics
  • Nucleic Acid Amplification Techniques / methods*
  • RNA, Viral
  • Reverse Transcription
  • Sensitivity and Specificity
  • Swine
  • Swine Diseases / diagnosis
  • Swine Diseases / virology*
  • Torovirus / genetics
  • Torovirus / isolation & purification*
  • Torovirus Infections / diagnosis
  • Torovirus Infections / veterinary*
  • Torovirus Infections / virology

Substances

  • DNA Primers
  • RNA, Viral