Development of a loop-mediated isothermal amplification assay combined with a lateral flow dipstick for rapid and simple detection of classical swine fever virus in the field

文献类型： 外文期刊

第一作者： Chowdry, Vinay Kumar

作者： Chowdry, Vinay Kumar;Widen, Frederik;Belak, Sandor;Liu, Lihong;Luo, Yuzi;Qiu, Hua-Ji;Shan, Hu

作者机构：

关键词： Classical swine fever virus;RT-LAMP;Lateral flow dipstick;Field diagnosis;Molecular detection

期刊名称：JOURNAL OF VIROLOGICAL METHODS （ 影响因子：2.014； 五年影响因子：2.001 ）

ISSN： 0166-0934

年卷期： 2014 年 197 卷

页码：

收录情况： SCI

摘要： Classical swine fever (CSF) is a highly contagious viral disease and may cause heavy economic loss to farmers. The rapid, simple and accurate diagnosis of the disease at the frontline, for example on the farms of concern is crucial for disease control. This study describes the development and evaluation of a new loop-mediated isothermal amplification (LAMP) assay coupled with lateral flow dipstick (LFD) for the detection of classical swine fever virus (CSFV). This RT-LAMP-LFD assay combines the efficient one-step isothermal amplification of CSF viral RNA and the simplicity of the LFD to read the results within two to five minutes. Seven genotypes (1.1, 1.2, 1.3, 2.1, 2.2, 2.3 and 3.1), but not genotype 3.4, were successfully detected by the RT-LAMP-LFD assay, indicating that the method has a broad range of detection and can be applied in different geographical areas where CSFV strains belonging to these genotypes are present. The performance of this RT-LAMP-LFD assay was similar to that of the real-time RT-PCR. The analytical sensitivity was about 100 copies per reaction when testing two genotypes (1.1 and 2.3). No cross-reactivity to non-CSFV pestiviruses was observed. This RT-LAMP-LFD assay can be a useful novel tool for the rapid, simple and economic diagnosis of classical swine fever in the field. (C) 2013 Elsevier B.V. All rights reserved.

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