Detection of capripoxvirus DNA using a novel loop-mediated isothermal amplification assay

BMC Veterinary Research

Donald P King¹  Valerie Mioulet¹  Chris AL Oura²  Katarzyna Bachanek-Bankowska¹  Eeva SM Tuppurainen¹  Lorraine Edwards¹  Lee Murray¹ 

[1] The Pirbright Institute, Ash Road, Pirbright, Surrey GU24 0NF, UK;Now at: Faculty of Medical Sciences, University of the West Indies, St. Augustine, Trinidad and Tobago

关键词: Field tests;    Isothermal amplification;    Diagnostics;    Capripoxvirus;   

Others  :  1119548
DOI  :  10.1186/1746-6148-9-90

 received in 2012-12-10, accepted in 2013-04-25,  发布年份 2013

【 摘 要 】

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.

【 授权许可】

   
2013 Murray et al.; licensee BioMed Central Ltd.

【 图 表 】

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