European freshwater VHSV genotype Ia isolates divide into two distinct subpopulations

Diseases of Aquatic Organisms
S KahnsN J Olesen

Abstract

Viral haemorrhagic septicaemia (VHS), caused by the novirhabdovirus VHSV, often leads to significant economic losses to European rainbow trout production. The virus isolates are divided into 4 distinct genotypes with additional subgroups including sublineage Ia, isolates of which are the main source of outbreaks in European rainbow trout farming. A significant portion of Danish rainbow trout farms have been considered endemically infected with VHSV since the first disease outbreak was observed in the 1950s. However, following a series of sanitary programs starting in 1965, VHSV has not been detected in Denmark since January 2009. Full-length G-genes of all Danish VHSV isolates that were submitted for diagnostic analyses in the period 2004-2009 were sequenced and analysed. All 58 Danish isolates from rainbow trout grouped with sublineage Ia isolates. Furthermore, VHSV isolates from infected Danish freshwater catchments appear to have evolved into a distinct clade within sublineage Ia, herein designated clade Ia-1, whereas trout isolates originating from other continental European countries cluster in another distinct clade, designated clade Ia-2. In addition, phylogenetic analyses indicate that VHSV Ia-1 strains have caused a fe...Continue Reading

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Citations

Jul 6, 2014·Diseases of Aquatic Organisms·Britt Bang JensenNiels Jørgen Olesen
Sep 8, 2016·Frontiers in Microbiology·Miriam AbbadiValentina Panzarin
Oct 21, 2016·PloS One·Michael CieslakHeike Schütze
Sep 29, 2020·Frontiers in Microbiology·Valentina PanzarinNiels J Olesen
Apr 4, 2021·Animals : an Open Access Journal From MDPI·Carmen López-VázquezCarlos P Dopazo
Jun 3, 2021·Pathogens·Kizito K MugimbaHetron M Munang'andu

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