Journal article
Oral transmission as a route of infection for viral haemorrhagic septicaemia virus in rainbow trout, Oncorhynchus mykiss (Walbaum) : Oral transmission of VHSV
Aarhus University1
National Veterinary Institute, Technical University of Denmark2
Section of Fish Diseases, Division of Poultry, Fish and Fur Animals, National Veterinary Institute, Technical University of Denmark3
Division of Poultry, Fish and Fur Animals, National Veterinary Institute, Technical University of Denmark4
Surveys among wild marine fish have revealed occurrence of viral haemorrhagic septicaemia virus (VHSV) infections in a high number of diverse fish species. In marine aquaculture of rainbow trout, preying on invading wild fish might thus be a risk factor for introduction and adaptation of VHSV and subsequent disease outbreaks.
Our objective was to determine whether an oral transmission route for VHSV in rainbow trout exists. Juvenile trout were infected through oral, waterborne and cohabitation transmission routes, using a recombinant virus strain harbouring Renilla luciferase as reporter gene. Viral replication in stomach and kidney tissue was detected through bioluminescence activity of luciferase and qRT‐PCR.
Replication was detected in both tissues, irrespective of transmission route. Replication patterns, however, differed among transmission routes. In trout infected through oral transmission, replication was detected in the stomach prior to kidney tissue. In trout infected through waterborne or cohabitation transmission, replication was detected in kidney prior to stomach or in both tissues simultaneously.
We demonstrate the existence of an oral transmission route for VHSV in rainbow trout. This implies that preying on invading infected wild fish is a risk factor for introduction of VHSV into marine cultures of rainbow trout.
Language: | English |
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Year: | 2012 |
Pages: | 395-406 |
ISSN: | 13652761 and 01407775 |
Types: | Journal article |
DOI: | 10.1111/j.1365-2761.2012.01358.x |
ORCIDs: | 0000-0002-5057-9351 , 0000-0003-1228-2159 and Lorenzen, Niels |
Bioluminescence Fish Oral Recombinant virus Rhabdoviridae SDG 14 - Life Below Water Transmission route
Administration, Oral Animal Feed Animals Aquaculture Genes, Reporter Hemorrhagic Septicemia, Viral Luciferases Novirhabdovirus Oncorhynchus mykiss Predatory Behavior Real-Time Polymerase Chain Reaction Statistics, Nonparametric Virus Replication bioluminescence fish oral recombinant virus transmission route