Use of automated real-time reverse transcription-polymerase chain reaction (RT-PCR) to monitor experimental swine vesicular disease virus infection in pigs

J Comp Pathol. 2004 Nov;131(4):308-17. doi: 10.1016/j.jcpa.2004.05.003.

Abstract

Automated real-time RT-PCR was evaluated as a diagnostic tool for swine vesicular disease virus (SVDV) infection on a range of samples (vesicular epithelium, serum, nasal swabs, faeces) from four inoculated and three in-contact pigs over a period of 28 days. Traditional diagnostic procedures (virus isolation, and ELISAs for antigen and antibody) were used in parallel. Each inoculated pig developed a significant viraemia and clinical disease, and excreted virus, which was transmitted to the in-contact animals. The latter, however, developed only a short-lived, low-level viraemia and no clinical disease. The RT-PCR and virus isolation were generally comparable in detecting SVDV in the serum and nasal swabs from inoculated and in-contact pigs up to day 6 after infection; it was possible, however, to isolate virus for a longer period from the faeces of a few pigs. This suggested that further optimization of the template extraction method was required to counteract the effects of RT-PCR inhibitors in faeces. It was concluded that the automated real-time RT-PCR is a useful diagnostic method for SVD in clinically or subclinically affected pigs and contributed to the study of the pathogenesis of SVD in the pigs.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Disease Transmission, Infectious*
  • Enterovirus B, Human / genetics
  • Enterovirus B, Human / immunology
  • Enterovirus B, Human / pathogenicity*
  • Enzyme-Linked Immunosorbent Assay / veterinary
  • RNA, Viral / analysis
  • Reverse Transcriptase Polymerase Chain Reaction / methods
  • Reverse Transcriptase Polymerase Chain Reaction / veterinary*
  • Swine
  • Swine Diseases / diagnosis*
  • Swine Diseases / virology
  • Swine Vesicular Disease* / pathology
  • Swine Vesicular Disease* / transmission
  • Swine Vesicular Disease* / virology

Substances

  • RNA, Viral