title: Detection of capripoxvirus DNA using a novel loop-mediated isothermal amplification assay.
abstract: BACKGROUND
  Sheep poxvirus (SPPV), Goat poxvirus (GTPV) and Lumpy skin disease virus (LSDV) are the most serious poxviruses of ruminants. They are double stranded DNA viruses of the genus Capripoxvirus, (subfamily Chordopoxvirinae) within the family Poxviridae. The aim of this study was to develop a Loop-mediated isothermal AMPlification (LAMP) assay for the detection of Capripoxvirus (CaPV) DNA.
  
  
  RESULTS
  A single LAMP assay targeting a conserved region of the CaPV P32 gene was selected from 3 pilot LAMP assays and optimised by adding loop primers to accelerate the reaction time. This LAMP assay successfully detected DNA prepared from representative CaPV isolates (SPPV, GTPV and LSDV), and did not cross-react with DNA extracted from other mammalian poxviruses. The analytical sensitivity of the LAMP assay was determined to be at least 163 DNA copies/μl which is equivalent to the performance reported for diagnostic real-time PCR currently used for the detection of CaPV. LAMP reactions were monitored with an intercalating dye using a real-time PCR machine, or by agarose-gel electrophoresis. Furthermore, dual labelled LAMP products (generated using internal LAMP primers that were conjugated with either biotin or fluorescein) could be readily visualised using a lateral-flow device.
  
  
  CONCLUSIONS
  This study provides a simple and rapid approach to detect CaPV DNA that may have utility for use in the field, or in non-specialised laboratories where expensive equipment is not available.
authors: The Pirbright Institute, Pirbright, Surrey, UK.
authors: Lee
authors: L
authors: Murray
authors: Lorraine
authors: L
authors: Edwards
authors: Eeva S M
authors: ES
authors: Tuppurainen
authors: Katarzyna
authors: K
authors: Bachanek-Bankowska
authors: Chris A L
authors: CA
authors: Oura
authors: Valerie
authors: V
authors: Mioulet
authors: Donald P
authors: DP
authors: King
mesh_terms: D000818:Animals; D018151:Capripoxvirus / Q000737:chemistry / Q000235:genetics*; D004279:DNA, Viral / Q000032:analysis / Q000235:genetics*; D004587:Electrophoresis, Agar Gel / Q000662:veterinary; D021141:Nucleic Acid Amplification Techniques / Q000379:methods / Q000662:veterinary*; D011213:Poxviridae Infections / Q000175:diagnosis / Q000235:genetics / Q000662:veterinary* / Q000821:virology; D060888:Real-Time Polymerase Chain Reaction / Q000662:veterinary; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D004279:DNA, Viral
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