Wild fish are negligible transmitters of viral haemorrhagic septicaemia virus (VHSV) genotype Id in the VHS restriction zone in Finland

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http://hdl.handle.net/10138/294743

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Vennerström , P , Välimäki , E , Hautaniemi , M , Lyytikainen , T , Kapiainen , S , Vidgren , G & Virtala , A-M 2018 , ' Wild fish are negligible transmitters of viral haemorrhagic septicaemia virus (VHSV) genotype Id in the VHS restriction zone in Finland ' , Diseases of Aquatic Organisms , vol. 131 , no. 3 , pp. 187-197 . https://doi.org/10.3354/dao03301

Title: Wild fish are negligible transmitters of viral haemorrhagic septicaemia virus (VHSV) genotype Id in the VHS restriction zone in Finland
Author: Vennerström, Pia; Välimäki, Elina; Hautaniemi, Maria; Lyytikainen, Tapani; Kapiainen, Suvi; Vidgren, Gabriele; Virtala, Anna-Maija
Contributor: University of Helsinki, Anna-Maija Kristiina Virtala / Principal Investigator
Date: 2018-11-20
Language: eng
Number of pages: 11
Belongs to series: Diseases of Aquatic Organisms
ISSN: 0177-5103
URI: http://hdl.handle.net/10138/294743
Abstract: Wild fish were suspected to be the source of reinfection by viral haemorrhagic septicaemia virus (VHSV) in Finnish brackish water rainbow trout farms located in a restriction zone regarding viral haemorrhagic septicaemia (VHS) comprising the entire Province of Aland, Baltic Sea, in the 2000s. Altogether, 1636 wild fish of 17 different species living in the vicinity of infected fish farms were screened for VHSV during the years 2005-2008. Additionally, 2 uninfected wild fish species as well as farmed whitefish were introduced into a VHS-positive fish farm to test whether they became infected by VHSV from the clinically diseased rainbow trout. Wild fish did not test positive for VHSV on any occasion. In contrast, whitefish introduced to a VHS-positive farm were infected with VHSV genotype Id and started to replicate the virus for a short time during the trial. Whitefish are farmed together with, or in the vicinity of, farmed rainbow trout in the study area and, according to this study, are a possible source of the recurring infection in the restriction area. A sprivivirus was isolated from all fish species in the infection trial without causing mortality in the test groups.
Subject: Viral hemorrhagic septicemia
VHSV
Aquaculture
Disease control
Whitefish
Wild fish
Carrier
Epidemiology
RAINBOW-TROUT
LAKE-ONTARIO
MARINE FISH
GENE
AMERICAN
SEQUENCE
SUSCEPTIBILITY
RHABDOVIRUS
MORTALITY
EVOLUTION
413 Veterinary science
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