A Novel RT-LAMP Assay for Rapid and Simple Detection of Classical Swine Fever Virus

Author: Lei CHEN ; Xuezheng FAN ; Qin WANG ; Lu XU ; Qizu ZHAO ; Yuanchen ZHOU ; Jun LIU ; Bo TANG ; Xingqi ZOU
Publication Type:Journal Article
Keywords: Classical swine fever virus(CSFV); Reverse transcription loop-mediated isothermal amplification (RT-LAMP); Rapid detection
From: Virologica Sinica 2010;25(1):59-64
CountryChina
Language:Chinese
Abstract: A simple and rapid assay for the detection of Classical swine fever virus(CSFV)was established using reverse transcription loop-mediated isothermal amplification(RT-LAMP).This study describes the amplification of the genomic RNA of CSFV under isothermal conditions(63℃)within one hour,using a set of six primers(two outer primers,two inner primers and two loop primers).This RT-LAMP assay showed 100-fold higher sensitivity than the standard RT-PCR method and identified eighteen additional positive cases that were negative when tested by RT-PCR.This RT-LAMP was able to detect all the 13 strains of CSFV but not the BVDV.PRRSV.SIV.PRV-PCV,thus showed a good specificity.Products amplified by RT-LAMP can be visualized by agarose gel electrophoresis and in addition,either as a white precipitate at the bottom of the tube after a pulse spin or as a color change when dyed with SYBR Green I which are visible to the naked eye.Because RT-LAMP is low-cost and produces rapid results,it has the potential to be an excellent tool for CSFV surveillance in the field,especially in developing countries.