Abstract
Reverse transcription loop-mediated isothermal amplification (RT-LAMP) assay is a novel method of gene amplification that amplifies nucleic acid with high specificity, sensitivity and rapidity, which can be applied for disease diagnosis in shrimp aquaculture. The method is performed under isothermal conditions with a set of four specially designed primers that recognize six distinct sequences of the target. In this study, using the RT-LAMP method, a protocol for detecting Taura syndrome virus which is a causative agent of Penaeus vannamei was developed. Time and temperature conditions for detection of TSV were optimized for 60 min at 63 °C. The nucleic acids of other shrimp pathogens (yellow head virus; YHV and white spot syndrome; WSSV) were not amplified by this RT-LAMP system. The detection of TSV using RT-LAMP was 10 times more sensitive than the RT-PCR but less sensitive than nested RT-PCR. However this system was more convenient, rapid, and does not require sophisticated PCR machine.
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