Virulence of viral hemorrhagic septicemia virus (VHSV) genotypes Ia, IVa, IVb, and IVc in five fish species

Diseases of Aquatic Organisms
Eveline EmmeneggerGael Kurath

Abstract

The susceptibility of yellow perch Perca flavescens, rainbow trout Oncorhynchus mykiss, Chinook salmon O. tshawytscha, koi Cyprinus carpio koi, and Pacific herring Clupea pallasii to 4 strains of viral hemorrhagic septicemia virus (VHSV) was assessed. Fish were challenged via intraperitoneal injection with high (1 × 106 plaque-forming units, PFU) and low (1 × 103 PFU) doses of a European strain (genotype Ia), and North American strains from the West coast (genotype IVa), Great Lakes (genotype IVb), and the East coast (genotype IVc). Pacific herring were exposed to the same VHSV strains, but at a single dose of 5 × 103 PFU ml-1 by immersion in static seawater. Overall, yellow perch were the most susceptible, with cumulative percent mortality (CPM) ranging from 84 to 100%, and 30 to 93% in fish injected with high or low doses of virus, respectively. Rainbow trout and Chinook salmon experienced higher mortalities (47 to 98% CPM) after exposure to strain Ia than to the other virus genotypes. Pacific herring were most susceptible to strain IVa with an average CPM of 80% and moderately susceptible (42 to 52% CPM) to the other genotypes. Koi had very low susceptibility (≤5.0% CPM) to all 4 VHSV strains. Fish tested at 7 d post challen...Continue Reading

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Citations

Jun 5, 2014·Journal of Aquatic Animal Health·Alexander D Palmer, Eveline J Emmenegger
Nov 22, 2017·Diseases of Aquatic Organisms·Rodman G GetchellPaul R Bowser
Nov 7, 2018·Journal of Fish Diseases·Sigríður GuðmundsdóttirNiels Jørgen Olesen
May 21, 2020·Animals : an Open Access Journal From MDPI·Linas Balčiauskas, Laima Balčiauskienė
Feb 3, 2016·Evolutionary Applications·David A KennedyAndrew R Wargo
Nov 17, 2020·Frontiers in Microbiology·Laury BaillonStéphane Biacchesi
Feb 6, 2020·Comparative Immunology, Microbiology and Infectious Diseases·Juan Gémez-MataJulia Béjar

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