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Tilapia Lake Virus was not detected in non-tilapine species within tilapia polyculture systems of Bangladesh
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Metadata
Document Title
Tilapia Lake Virus was not detected in non-tilapine species within tilapia polyculture systems of Bangladesh
Author
Debnath P.P.,Dinh-Hung N.,Taengphu S.,Nguyen V.V.,Delamare-Deboutteville J.,Senapin S.,Vishnumurthy Mohan C.,Dong H.T.,Rodkhum C.
Name from Authors Collection
Affiliations
The International Graduate Course of Veterinary Science and Technology (VST), Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand; Department of Veterinary Microbiology, Center of Excellent in Fish Infectious Diseases (CE FID), Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand; Fish Health Platform, Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand; National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand; Research Institute for Aquaculture No, Bac Ninh, Viet Nam; WorldFish, Penang, Malaysia; Department of Food, Agriculture and Bioresources, Aquaculture and Aquatic Resources Management Program, Asian Institute of Technology (AIT), School of Environment, Klong Luang, Pathumthani, Thailand
Type
Article
Source Title
Journal of Fish Diseases
ISSN
01407775
Year
2021
Open Access
All Open Access, Hybrid Gold
Publisher
John Wiley and Sons Inc
DOI
10.1111/jfd.13537
Abstract
Sixteen countries, including Bangladesh, have reported the presence of tilapia lake virus (TiLV), an emerging tilapia pathogen. Fish polyculture is a common farming practice in Bangladesh. Some unusual mortalities reported in species co-cultivated with TiLV-infected tilapia led us to investigate whether any of the co-cultivated species would also test positive for TiLV and whether they were susceptible to TiLV infection under controlled laboratory experiments. Using 183 samples obtained from 15 farms in six districts across Bangladesh, we determined that 20% of the farms tested positive for TiLV in tilapia, while 15 co-cultivated fish species and seven other invertebrates (e.g. insects and crustaceans) considered potential carriers all tested negative. Of the six representative fish species experimentally infected with TiLV, only Nile tilapia showed the typical clinical signs of the disease, with 70% mortality within 12 days. By contrast, four carp species and one catfish species challenged with TiLV showed no signs of TiLV infection. Challenged tilapia were confirmed as TiLV-positive by RT-qPCR, while challenged carp and walking catfish all tested negative. Overall, our field and laboratory findings indicate that species used in polycultures are not susceptible to TiLV. Although current evidence suggests that TiLV is likely host-specific to tilapia, targeted surveillance for TiLV in other fish species in polyculture systems should continue, in order to prepare for a possible future scenario where TiLV mutates and/or adapts to new host(s). © 2021 The Authors. Journal of Fish Diseases published by John Wiley & Sons Ltd.
Keyword
Bangladesh | carp species | Nile tilapia | polyculture | susceptibility | TiLV | walking catfish
Industrial Classification
Knowledge Taxonomy Level 1
Knowledge Taxonomy Level 2
Knowledge Taxonomy Level 3
License
N/A
Rights
N/A
Publication Source
Scopus