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Closed-tube field-deployable loop-mediated isothermal amplification (LAMP) assay based on spore wall protein (SWP) for the visual detection of Enterocytozoon hepatopenaei (EHP)

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Title Closed-tube field-deployable loop-mediated isothermal amplification (LAMP) assay based on spore wall protein (SWP) for the visual detection of Enterocytozoon hepatopenaei (EHP)
Not Available
 
Creator T.Sathish Kumar,K.Radhika, J.Joseph Sahaya Rajan,M.Makesh,S.V.Alavandi, K.K.Vijayan
 
Subject Loop-mediated isothermal amplification (LAMP)Enterocytozoon hepatopenaeiSpore wall protein (SWP)Phenol redHydroxy naphthol blueClosed-tube LAMP
 
Description Not Available
Hepatopancreatic microsporidiosis (HPM) is an infectious shrimp disease caused by the microsporidian Enterocytozoon hepatopenaei (EHP). In recent years, the widespread occurrence of EHP poses a significant challenge to the shrimp aquaculture industry. Early, rapid and accurate diagnosis of EHP infection is very much essential for the control of HPM crop-related losses. Loop-mediated isothermal amplification (LAMP) is a robust, sensitive, cost-effective disease diagnostic technique. Here, we demonstrate an improved, simple, closed-tube, colorimetric EHP LAMP diagnostic assay. LAMP assay was illustrated with the specific EHP spore wall protein (SWP) gene primers. Naked eye visual detection of LAMP amplicons was achieved using Hydroxy naphthol blue (HNB) or Phenol red dye without opening the tubes. This LAMP assay is efficient in detecting the EHP pathogen in all clinical samples include shrimp hepatopancreas, FTA card samples, feces, pond water, and soil. Also, the elution of EHP DNA from FTA cards was demonstrated within 17 min using a simple dry bath. In clinical evaluation, the visual LAMP assay established 100% diagnostic sensitivity and 100% diagnostic specificity. The visual LAMP assay is rapid, can detect the EHP pathogen within 40 min using a simple dry bath, and does not require any expensive instruments and technical proficiency. In conclusion, this visual LAMP protocol is a user-friendly, specific assay that can be conceivably operated at the farm-site/ resource-limited settings by the farmer himself with simple equipment.
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Date 2022-02-18T06:41:12Z
2022-02-18T06:41:12Z
2021-07-01
 
Type Article
 
Identifier Sathish Kumar, T., Radhika, K., Joseph sahaya rajan, J., Makesh, M., Alavandi, S. V., Vijayan, K.K., 2021. Closed-tube field-deployable loop-mediated isothermal amplification (LAMP) assay based on spore wall protein (SWP) for the visual detection of Enterocytozoon hepatopenaei (EHP). J. Invertebr. Pathol. 183. https://doi.org/10.1016/J.JIP.2021.107624
ISSN 0022-2011
http://krishi.icar.gov.in/jspui/handle/123456789/69874
 
Language English
 
Relation Not Available;
 
Publisher Elsevier