title: The development of a rapid SYBR one step real-time RT-PCR for detection of Porcine Reproductive and Respiratory Syndrome Virus.
abstract: BACKGROUND
  Prompt detection of PRRSV in the field samples is important for effective PRRS control, thereby reducing the potentially serious economic damage which can result from an outbreak. In this study, a rapid SYBR-based, one step real-time RT-PCR quantitative reverse transcription PCR (qRT-PCR) has been developed for the detection of porcine reproductive and respiratory syndrome virus (PRRSV). Primers were designed based on the sequence of highly conservative region of PRRSV N gene.
  
  
  RESULTS
  The sensitivity of the real-time qRT-PCR assay was achieved through PRRSV ch-1a RNA for the generation of a standard curve. The detection limit of the assay was found to be 9.6 RNA copies per reaction mixture. This assay had excellent intra- and inter-assay reproducibility as in total 65 field samples were screened for the presence of PRRSV by conventional RT-PCR in parallel with qRT-PCR, and the detection rate increased from 60.0% to 76.9%. Moreover, the specificity result indicated that this assay could reliably differentiate PRRSV from the other swine viral diseases, such as classical swine fever virus (CSFV), swine vesicular disease virus (SVDV) and vesicular exanthema of swine virus (VESV).
  
  
  CONCLUSIONS
  The real-time qRT-PCR assay described in this report allows the rapid, specific and sensitive laboratory detection of PRRSV in field samples.
authors.affiliation: Key Laboratory of Animal Virology of Ministry of Agriculture, State Key Laboratory of Veterinary Etiologic Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Tian
authors.forename: JingYan
authors.initials: J
authors.lastname: Wu
authors.forename: YouJun
authors.initials: Y
authors.lastname: Shang
authors.forename: Yan
authors.initials: Y
authors.lastname: Cheng
authors.forename: XiangTao
authors.initials: X
authors.lastname: Liu
mesh_terms: D000818:Animals; D052160:Benzothiazoles; D017931:DNA Primers / Q000235:genetics; D003959:Diamines; D005456:Fluorescent Dyes / Q000494:pharmacology; D009930:Organic Chemicals / Q000494:pharmacology; D019318:Porcine Reproductive and Respiratory Syndrome / Q000175:diagnosis* / Q000821:virology; D019316:Porcine respiratory and reproductive syndrome virus / Q000235:genetics / Q000302:isolation & purification*; D011804:Quinolines; D012367:RNA, Viral / Q000235:genetics; D015203:Reproducibility of Results; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods*; D012680:Sensitivity and Specificity; D013552:Swine
chemical_list: D052160:Benzothiazoles; D017931:DNA Primers; D003959:Diamines; D005456:Fluorescent Dyes; D009930:Organic Chemicals; D011804:Quinolines; D012367:RNA, Viral; C098022:SYBR Green I
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