Rapid and sensitive detection of infectious spleen and kidney necrosis virus by loop-mediated isothermal amplification combined with a lateral flow dipstick

Archives of Virology
W C DingM Y Li

Abstract

Loop-mediated isothermal amplification (LAMP) allows rapid amplification of nucleic acids under isothermal conditions. In this report, a 20-min LAMP amplification of the DPOL gene of infectious spleen and kidney necrosis virus (ISKNV) using a biotin-labeled primer was combined with lateral flow dipstick (LFD) chromatography for rapid and simple visual detection of ISKNV-specific amplicons. The LFD process involves a 5-min specific hybridization with an FITC-labeled DNA probe to confirm the presence of complement ISKNV amplicons that were biotinated in LAMP. The resulting DNA duplexes, consisting of labeled probes and amplicons, migrate along the LFD strip by chromatography for 5 min and are trapped at the test line and visualized by biotin labeling. The detection limit of ISKNV by LAMP-LFD was 10 copies. The results show that the LAMP-LFD method has the advantages of better sensitivity and speed and less dependence on equipment than the standard PCR for specifically detecting low levels of ISKNV DNA, and this can be useful in the field as a routine diagnostic tool.

References

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Citations

Jun 3, 2015·Diagnostic Microbiology and Infectious Disease·Allison L DaunerShuenn-Jue L Wu
Mar 24, 2015·Molecular and Cellular Probes·Dimitra K ToubanakiEvdokia Karagouni
Oct 7, 2016·Food and Environmental Virology·Estefanía J ValverdeJuan J Borrego
Dec 29, 2020·Veterinary World·Che Azarulzaman Che Johan, Sandra Catherine Zainathan
Feb 20, 2021·Materials Science for Energy Technologies·Victoria Xin Ting ZhaoXiaodong Zhou
Jan 29, 2013·Journal of Agricultural and Food Chemistry·Franziska VaagtMarkus Fischer

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