Development of a SYBR Green quantitative PCR assay for detection of Lates calcarifer herpesvirus (LCHV) in farmed barramundi

Meemetta, Watcharachai, Domingos, Jose A., Dong, Ha Thanh, and Senapin, Saengchan (2020) Development of a SYBR Green quantitative PCR assay for detection of Lates calcarifer herpesvirus (LCHV) in farmed barramundi. Journal of Virological Methods, 285. 113920.

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Abstract

Lates calcarifer herpes virus (LCHV) is a novel virus of farmed barramundi in Southeast Asia. However, a rapid detection method is yet to be available for LCHV. This study, therefore, aimed to develop a rapid quantitative PCR (qPCR) detection method for LCHV and made it timely available to public for disease diagnostics and surveillance in barramundi farming countries. A newly designed primer set targeting a 93-bp fragment of the LCHV putative major envelope protein encoding gene (MEP) was used for developing and optimizing a SYBR Green based qPCR assay. The established protocol could detect as low as 10 viral copies per μl of DNA template in a reaction containing spiked host DNA. No cross-amplification with genomic DNA extracted from host as well as common aquatic pathogens (12 bacteria and 4 viruses) were observed. Validation test of the method with clinical samples revealed that the virus was detected in multiple organs of the clinically sick fish but not in the healthy fish. We thus recommend that barramundi farming countries should promptly initiate active surveillance for LCHV in order to understand their circulation for preventing possibly negative impact to the industry.

Item ID: 64773
Item Type: Article (Research - C1)
ISSN: 1879-0984
Keywords: Detection, Lates calcarifer herpes virus LCHV, qPCR, Scale drop, Barramundi
Copyright Information: © 2020 Elsevier B.V. All rights reserved
Funders: Mahidol University
Date Deposited: 26 Oct 2020 01:02
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070401 Aquaculture @ 50%
07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070404 Fish Pests and Diseases @ 50%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830102 Aquaculture Fin Fish (excl. Tuna) @ 100%
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