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Danne L, Horn L, Feldhaus A, Fey D, Emde S, Schütze H, Adamek M, Hellmann J. Virus infections of the European Eel in North Rhine Westphalian rivers. JOURNAL OF FISH DISEASES 2022; 45:69-76. [PMID: 34585388 DOI: 10.1111/jfd.13536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 08/29/2021] [Accepted: 08/31/2021] [Indexed: 06/13/2023]
Abstract
Viral infections have been suggested to play a role in the decline of the panmictic population of the European eel (Anguilla anguilla). However, despite the importance of knowledge about pathogenic eel viruses, little is known about their spread in the wild European eel population and only a few eel pathogenic viruses have been described so far. In this study, we aimed to investigate the health status of the A. anguilla stock in North Rhine Westphalia (NRW) State of Germany. For this purpose, we examined tissue samples of 16 elvers, 100 yellow eels and 6 silver eels, sampled from the rivers Rhine, Lippe and Ems. Virus detection was performed via a combination of cell culture and PCR. Next to the detection of frequently encountered pathogenic eel viruses (anguillid herpesvirus 1 and eel virus European X (EVEX)), we isolated the eel picornavirus 1 (EPV-1) from tissue of yellow eels and elvers and demonstrate the distribution of EPV-1 in wild eel population in NRW.
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Affiliation(s)
- Linna Danne
- Environment and Consumer Protection, Fisheries Ecology and Aquaculture, North Rhine Westphalian State Agency for Nature, Kirchhundem-Albaum, Germany
| | - Lisa Horn
- Environment and Consumer Protection, Fisheries Ecology and Aquaculture, North Rhine Westphalian State Agency for Nature, Kirchhundem-Albaum, Germany
| | - Anita Feldhaus
- Environment and Consumer Protection, Fisheries Ecology and Aquaculture, North Rhine Westphalian State Agency for Nature, Kirchhundem-Albaum, Germany
| | - Daniel Fey
- Environment and Consumer Protection, Fisheries Ecology and Aquaculture, North Rhine Westphalian State Agency for Nature, Kirchhundem-Albaum, Germany
| | - Sebastian Emde
- Environment and Consumer Protection, Fisheries Ecology and Aquaculture, North Rhine Westphalian State Agency for Nature, Kirchhundem-Albaum, Germany
| | - Heike Schütze
- Friedrich-Loeffler-Institute, Institute of Infectology, Federal Research Institute for Animal Health, Greifswald, Germany
| | - Mikolaj Adamek
- Fish Disease Research Unit, Centre for Infection Medicine, University of Veterinary Medicine, Hannover, Germany
| | - John Hellmann
- Environment and Consumer Protection, Fisheries Ecology and Aquaculture, North Rhine Westphalian State Agency for Nature, Kirchhundem-Albaum, Germany
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2
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Lee KM, Kim DH, Kim KH. Replication of heterologous glycoprotein-expressing chimeric recombinant snakehead rhabdoviruses (rSHRVs) and viral hemorrhagic septicemia viruses (rVHSVs) at different temperatures. Virus Res 2021; 297:198392. [PMID: 33727091 DOI: 10.1016/j.virusres.2021.198392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 03/09/2021] [Accepted: 03/10/2021] [Indexed: 10/21/2022]
Abstract
Water temperature is an important environmental factor for the outbreaks of fish rhabdovirus diseases. In the present study, to know the role of piscine rhabdoviral glycoproteins in the determination of replication temperature, several chimeric snakehead rhabdoviruses (SHRVs) and viral hemorrhagic septicemia viruses (VHSVs) expressing heterologous glycoproteins (rSHRV-Gvhsv, SHRV expressing VHSV G protein; rSHRV-Gsvcv, SHRV expressing spring viremia of carp virus G protein; rVHSV-Gshrv, VHSV expressing SHRV G protein; rVHSV-Gsvcv, VHSV expressing SVCV G protein) were generated using reverse genetics, and their replication characteristics at different temperatures were investigated. Furthermore, based on SHRV minigenome containing a reporter gene, the role of VHSV N, P, and L proteins in the determination of VHSV's low-temperature replication was investigated. In Epithelioma papulosum cyprini (EPC) cells, rSHRV-Gvhsv could replicate only at low temperatures (15 and 20 °C) but not at 25 and 28 °C, while rSHRV-Gsvcv could replicate both low and high temperatures, indicating that VHSV G protein is a critical factor that determines the limit of replication-possible temperatures in VHSV. The range of replication-possible temperature of chimeric VHSVs (rVHSV-Gshrv and rVHSV-Gsvcv) was not different from that of rVHSV-wild (replicated only at 15 and 20 °C) in spite of having the G protein of high temperature-replicating viruses, suggesting that not only G protein but also other viral protein(s) would be involved in the determination of replication-possible temperature limit in VHSV. Cells harboring SHRV minigenome that expressing eGFP as a reporter protein were co-transfected with heterologous combinations of helper plasmids of SHRV and VHSV, through which we could exclude VHSV N and P proteins for the low-temperature replication of VHSV, because cells harboring SHRV minigenome showed fluorescence at high temperatures when VHSV N or P protein encoding plasmids were supplied. However, no fluorescence was observed in cells co-transfected with plasmids encoding SHRV N, SHRV P and VHSV L protein at all tested temperatures, suggesting that the combination of SHRV N, P and VHSV L proteins could not form a functional ribonucleoprotein (RNP) complex. Although we could not directly demonstrate the involvement of VHSV L protein in the temperature limit of VHSV replication, it is highly probable that not only VHSV G protein but also VHSV L protein may participate in the determination of VHSV replication temperature.
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Affiliation(s)
- Kyung Min Lee
- Department of Aquatic Life Medicine, Pukyong National University, Busan, 48513, South Korea
| | - Do-Hyung Kim
- Department of Aquatic Life Medicine, Pukyong National University, Busan, 48513, South Korea
| | - Ki Hong Kim
- Department of Aquatic Life Medicine, Pukyong National University, Busan, 48513, South Korea.
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Clouthier SC, Schroeder T, Bueren EK, Anderson ED, Emmenegger E. Analytical validation of two RT-qPCR tests and detection of spring viremia of carp virus (SVCV) in persistently infected koi Cyprinus carpio. DISEASES OF AQUATIC ORGANISMS 2021; 143:169-188. [PMID: 33629660 DOI: 10.3354/dao03564] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Spring viremia of carp virus (SVCV) ia a carp sprivivirus and a member of the genus Sprivivirus within the family Rhabdoviridae. The virus is the etiological agent of spring viremia of carp, a disease of cyprinid species including koi Cyprinus carpio L. and notifiable to the World Organisation for Animal Health. The goal of this study was to explore hypotheses regarding inter-genogroup (Ia to Id) SVCV infection dynamics in juvenile koi and contemporaneously create new reverse-transcription quantitative PCR (RT-qPCR) assays and validate their analytical sensitivity, specificity (ASp) and repeatability for diagnostic detection of SVCV. RT-qPCR diagnostic tests targeting the SVCV nucleoprotein (Q2N) or glycoprotein (Q1G) nucleotides were pan-specific for isolates typed to SVCV genogroups Ia to Id. The Q2N test had broader ASp than Q1G because Q1G did not detect SVCV isolate 20120450 and Q2N displayed occasional detection of pike fry sprivivirus isolate V76. Neither test cross-reacted with other rhabdoviruses, infectious pancreatic necrosis virus or co-localizing cyprinid herpesvirus 3. Both tests were sensitive with observed 50% limits of detection of 3 plasmid copies and high repeatability. Test analysis of koi immersed in SVCV showed that the virus could be detected for at least 167 d following exposure and that titer, prevalence, replicative rate and persistence in koi were correlated significantly with virus virulence. In this context, high virulence SVCV isolates were more prevalent, reached higher titers quicker and persisted in koi for longer periods of time relative to moderate and low virulence isolates.
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Affiliation(s)
- Sharon C Clouthier
- Fisheries & Oceans Canada, Freshwater Institute, Winnipeg, Manitoba R3T 2N6, Canada
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4
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Revisiting the Classification of Percid Perhabdoviruses Using New Full-Length Genomes. Viruses 2020; 12:v12060649. [PMID: 32560066 PMCID: PMC7354598 DOI: 10.3390/v12060649] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/05/2020] [Accepted: 06/11/2020] [Indexed: 11/16/2022] Open
Abstract
Perhabdoviruses are a threat to some freshwater fish species raised in aquaculture farms in Europe. Although the genetic diversity of these viruses is suspected to be high, the classification of isolates is still in its infancy, with just one full-length genome available and only partial sequences for a limited number of others. Here, we characterized a series of viruses isolated from percids in France from 1999 to 2009 by sequencing the nucleoprotein (N) gene. Four main clusters were distinguished, all related at varying levels of similarity to one of the two already-recognized species, namely Perch perhabdovirus and Sea trout perhabdovirus. Furthermore, we obtained the complete genome of five isolates, including one belonging to Sea trout rhabdovirus. The analysis of the complete L genes and the concatenated open reading frames confirmed the existence of four main genetic clusters, sharing 69 to 74% similarity. We propose the assignation of all these viral isolates into four species, including two new ones: Perch perhabdovirus 1, Perch perhabdovirus 2, Sea trout perhabdovirus 1 and Sea trout perhabdovirus 2. In addition, we developed new primers to readily amplify specific portions of the N gene of any isolate of each species by conventional PCR. The presence of such genetically diverse viruses in France is likely due to divergent viral populations maintained in the wild and then introduced to experimental facilities or farms, as well as via trade between farms across the European continent. It is now urgent to improve the identification tools for this large group of viruses to prevent their unchecked dissemination.
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5
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Bedendo G, Panzarin V, Fortin A, Zamperin G, Pretto T, Buratin A, Quartesan R, Sabbion M, Salogni C, Pascoli F, Toffan A. Detection and characterization of a rhabdovirus causing mortality in black bullhead catfish, Ameiurus melas. JOURNAL OF FISH DISEASES 2018; 41:1063-1075. [PMID: 29572941 DOI: 10.1111/jfd.12797] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 01/30/2018] [Accepted: 01/31/2018] [Indexed: 06/08/2023]
Abstract
This study fully describes a severe disease outbreak occurred in 2016 in black bullhead catfish farmed in Italy. Affected fish showed nervous clinical signs as well as emaciations and haemorrhagic petechiae on the skin at the fin bases, abdomen and gills. Viral isolation in cell culture allowed the subsequent identification of a rhabdovirus, tentatively named ictalurid rhabdovirus (IcRV), through electron microscopy, immunofluorescence and whole genome sequencing (WGS). The newly isolated virus, together with 14 additional viral strains stored in our repository and detected during similar mortality episodes in the period 1993-2016, was phylogenetically analysed on the basis of the nucleoprotein and the glycoprotein nucleotide and amino acid sequences. The genetic distances among Italian IcRV strains were also estimated. Our results show that all the IcRV strains belong to the genus Sprivivirus and are closely related to the tench rhabdovirus (TenRV). Italian catfish production is constantly decreasing, mainly due to viral infections, which include the newly characterized IcRV. Data presented in this work will assist to investigate the molecular epidemiology and the diffusive dynamics of this virus and to develop adequate surveillance activities.
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Affiliation(s)
- Giulia Bedendo
- Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, PD, Italy
| | | | - Andrea Fortin
- Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, PD, Italy
| | | | - Tobia Pretto
- Istituto Zooprofilattico Sperimentale delle Venezie, Adria, RO, Italy
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Bologna, BO, Italy
| | | | - Rosita Quartesan
- Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, PD, Italy
| | | | - Cristian Salogni
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna, Brescia, BS, Italy
| | - Francesco Pascoli
- Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, PD, Italy
| | - Anna Toffan
- Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, PD, Italy
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6
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Emmenegger EJ, Biacchesi S, Mérour E, Glenn JA, Palmer AD, Brémont M, Kurath G. Virulence of a chimeric recombinant infectious haematopoietic necrosis virus expressing the spring viraemia of carp virus glycoprotein in salmonid and cyprinid fish. JOURNAL OF FISH DISEASES 2018; 41:67-78. [PMID: 28799647 DOI: 10.1111/jfd.12678] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 05/25/2017] [Accepted: 05/27/2017] [Indexed: 06/07/2023]
Abstract
Infectious haematopoietic necrosis virus (IHNV) and spring viraemia of carp virus (SVCV) are both rhabdoviruses of fish, listed as notifiable disease agents by the World Organization for Animal Health. Recombinant rhabdoviruses with heterologous gene substitutions have been engineered to study genetic determinants and assess the potential of these recombinant viruses for vaccine development. A recombinant IHNV (rIHNV), containing the full-length genome of a European IHNV strain, was modified by deleting the glycoprotein (G) gene and replacing it with a European SVCV G-gene to make the rIHNV-Gsvcv. The chimeric rIHNV-Gsvcv level of virulence in rainbow trout, common carp and koi was assessed, and its ability to induce a protective immune response in surviving koi against wild-type SVCV infection was tested. The rIHNV-Gsvcv infection of trout led to high mortality, ranging from 78% to 92.5%, after immersion. In contrast, no deaths occurred in juvenile common carp after infection with rIHNV-Gsvcv by either immersion or intraperitoneal (IP) injection. Similarly, koi infected with rIHNV-Gsvcv via IP injection had little to no mortality (≤9%). Koi that survived initial infection with a high dose of recombinant virus rIHNV-Gsvcv were protected against a virulent SVCV challenge resulting in a high relative per cent survival of 82.5%.
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Affiliation(s)
- E J Emmenegger
- US Geological Survey, Western Fisheries Research Center, Seattle, WA, USA
| | - S Biacchesi
- Virologie et Immunologie Moléculaires (VIM), INRA, Université Paris-Saclay, Jouy-en-Josas, France
| | - E Mérour
- Virologie et Immunologie Moléculaires (VIM), INRA, Université Paris-Saclay, Jouy-en-Josas, France
| | - J A Glenn
- NanoString Technologies Inc., Seattle, WA, USA
| | - A D Palmer
- Department of Microbiology, Chemical and Life Sciences Laboratories, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - M Brémont
- Virologie et Immunologie Moléculaires (VIM), INRA, Université Paris-Saclay, Jouy-en-Josas, France
| | - G Kurath
- US Geological Survey, Western Fisheries Research Center, Seattle, WA, USA
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7
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Bigarré L, Plassiart G, de Boisséson C, Pallandre L, Pozet F, Ledoré Y, Fontaine P, Lieffrig F. Molecular investigations of outbreaks of Perch perhabdovirus infections in pike-perch. DISEASES OF AQUATIC ORGANISMS 2017; 127:19-27. [PMID: 29256424 DOI: 10.3354/dao03177] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In 2016, a total of 5 massive mortality episodes each affecting hundreds of thousands of pike-perch Sander lucioperca larvae occurred at 2 sites in 2 Western European countries. For each episode, perhabdoviruses related to the perch rhabdovirus (PRV) were detected in samples, using either PCR or cell culture combined with PCR. The sequences of the glycoprotein (g), phosphoprotein (p) and nucleoprotein (n) genes of these samples demonstrated that 2 different genotypes were present at 1 site, each associated with 1 of the 3 episodes. At the other site, a single genotype was associated with the 2 outbreaks. Furthermore, this genotype was strictly identical to 1 genotype involved in the outbreaks of the first site, strongly suggesting a common origin for these 2 viruses. The common origin was confirmed a posteriori because some larvae introduced to both sites had exactly the same geographic origin in Eastern Europe. Taken together, the molecular and epidemiological data suggest that both horizontal and vertical transmission of 2 distinct strains of perhabdoviruses were involved in the various outbreaks affecting pike-perch.
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Affiliation(s)
- Laurent Bigarré
- ANSES, Laboratoire Ploufragan-Plouzané, 29280 Plouzané, France
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8
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Bellec L, Louboutin L, Cabon J, Castric J, Cozien J, Thiéry R, Morin T. Molecular evolution and phylogeography of infectious hematopoietic necrosis virus with a focus on its presence in France over the last 30 years. J Gen Virol 2017; 98:2438-2446. [PMID: 28874229 DOI: 10.1099/jgv.0.000894] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Infectious hematopoietic necrosis virus (IHNV) is among the most important pathogens affecting the salmonid industry. Here, we investigated the molecular evolution and circulation of isolates from 11 countries or regions all over the world, with a special focus on the epidemiological situation in France. The phylogeography, time to the most recent common ancestor (TMRCA) and nucleotide substitution rate were studied using 118 full-length glycoprotein gene sequences isolated from 9 countries (5 genogroups) over a period of 47 years. The TMRCA dates back to 1943, with the L genogroup identified as the likely root (67 %), which is consistent with the first report of this pathogen in the USA. A Bayesian inference approach was applied to the partial glycoprotein gene sequences of 88 representative strains isolated in France over the period 1987-2015. The genetic diversity of these 88 sequences showed mean nucleotide and amino-acid identities of 97.1 and 97.8 %, respectively, and a d N/d S ratio (non-synonymous to synonymous mutations) of 0.25, indicating purifying selection. The French viral populations are divided into eight sub-clades and four individual isolates, with a clear spatial differentiation, suggesting the predominant role of local reservoirs in contamination. The atypical 'signatures' of some isolates underlined the usefulness of molecular phylogeny for epidemiological investigations that track the spread of IHNV.
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Affiliation(s)
- Laure Bellec
- IFREMER, Centre Brest, REM/EEP/LEP, ZI de la Pointe du Diable, CS10070, 29280 Plouzané, France.,IFREMER, Centre Brest, REM/EEP/LMEE, UMR6197, ZI de la Pointe du Diable, CS10070, 29280 Plouzané, France
| | - Lénaïg Louboutin
- French Agency for Food, Environmental and Occupational Health and Safety (ANSES), Ploufragan-Plouzané Laboratory, Viral Fish Pathology Unit, National Reference Laboratory for Regulated Fish Diseases, Bretagne Loire University, Technopôle Brest-Iroise, BP 70, 29280 Plouzané, France
| | - Joëlle Cabon
- French Agency for Food, Environmental and Occupational Health and Safety (ANSES), Ploufragan-Plouzané Laboratory, Viral Fish Pathology Unit, National Reference Laboratory for Regulated Fish Diseases, Bretagne Loire University, Technopôle Brest-Iroise, BP 70, 29280 Plouzané, France
| | - Jeanne Castric
- French Agency for Food, Environmental and Occupational Health and Safety (ANSES), Ploufragan-Plouzané Laboratory, Viral Fish Pathology Unit, National Reference Laboratory for Regulated Fish Diseases, Bretagne Loire University, Technopôle Brest-Iroise, BP 70, 29280 Plouzané, France
| | - Joëlle Cozien
- IFREMER, Laboratoire Santé Environnement et Microbiologie (PDG-RBE-SG2M-LSEM), Technopôle Brest-Iroise, 29280 Plouzané, France
| | - Richard Thiéry
- French Agency for Food, Environmental and Occupational Health and Safety (ANSES), Sophia Antipolis Laboratory, 06902 Sophia-Antipolis, France
| | - Thierry Morin
- French Agency for Food, Environmental and Occupational Health and Safety (ANSES), Ploufragan-Plouzané Laboratory, Viral Fish Pathology Unit, National Reference Laboratory for Regulated Fish Diseases, Bretagne Loire University, Technopôle Brest-Iroise, BP 70, 29280 Plouzané, France
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9
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Shao L, Zhao J. Isolation of a highly pathogenic spring viraemia of carp virus strain from grass carp ( Ctenopharyngodon idella ) in late summer, China, 2016. Virus Res 2017; 238:183-192. [DOI: 10.1016/j.virusres.2017.06.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 06/21/2017] [Accepted: 06/29/2017] [Indexed: 10/19/2022]
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10
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Dietzgen RG, Kondo H, Goodin MM, Kurath G, Vasilakis N. The family Rhabdoviridae: mono- and bipartite negative-sense RNA viruses with diverse genome organization and common evolutionary origins. Virus Res 2017; 227:158-170. [PMID: 27773769 PMCID: PMC5124403 DOI: 10.1016/j.virusres.2016.10.010] [Citation(s) in RCA: 147] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 10/18/2016] [Accepted: 10/18/2016] [Indexed: 12/24/2022]
Abstract
The family Rhabdoviridae consists of mostly enveloped, bullet-shaped or bacilliform viruses with a negative-sense, single-stranded RNA genome that infect vertebrates, invertebrates or plants. This ecological diversity is reflected by the diversity and complexity of their genomes. Five canonical structural protein genes are conserved in all rhabdoviruses, but may be overprinted, overlapped or interspersed with several novel and diverse accessory genes. This review gives an overview of the characteristics and diversity of rhabdoviruses, their taxonomic classification, replication mechanism, properties of classical rhabdoviruses such as rabies virus and rhabdoviruses with complex genomes, rhabdoviruses infecting aquatic species, and plant rhabdoviruses with both mono- and bipartite genomes.
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Affiliation(s)
- Ralf G Dietzgen
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St. Lucia, Queensland 4072, Australia.
| | - Hideki Kondo
- Institute of Plant Science and Resources, Okayama University, Kurashiki, 710-0046, Japan
| | - Michael M Goodin
- Department of Plant Pathology, University of Kentucky, Lexington, KY 40546, USA
| | - Gael Kurath
- U.S. Geological Survey, Western Fisheries Research Centre, Seattle, WA, USA
| | - Nikos Vasilakis
- Institute for Human Infection and Immunity, University of Texas Medical Branch, Galveston, TX, 77555, USA
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11
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Maj-Paluch J, Borzym E, Matras M, Stachnik M, Reichert M. Genetic diversity of spring viraemia of carp virus isolates based on the glycoprotein gene. JOURNAL OF FISH DISEASES 2016; 39:1247-1252. [PMID: 26791607 DOI: 10.1111/jfd.12445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 11/10/2015] [Accepted: 11/12/2015] [Indexed: 06/05/2023]
Affiliation(s)
- J Maj-Paluch
- Department of Fish Diseases, National Veterinary Research Institute, Pulawy, Poland
| | - E Borzym
- Department of Fish Diseases, National Veterinary Research Institute, Pulawy, Poland
| | - M Matras
- Department of Fish Diseases, National Veterinary Research Institute, Pulawy, Poland
| | - M Stachnik
- Department of Fish Diseases, National Veterinary Research Institute, Pulawy, Poland
| | - M Reichert
- Department of Fish Diseases, National Veterinary Research Institute, Pulawy, Poland
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12
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Ashraf U, Lu Y, Lin L, Yuan J, Wang M, Liu X. Spring viraemia of carp virus: recent advances. J Gen Virol 2016; 97:1037-1051. [DOI: 10.1099/jgv.0.000436] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- Usama Ashraf
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei 430070, PRChina
- Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, PRChina
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei 430070, PRChina
| | - Yuanan Lu
- Department of Public Health Sciences, University of Hawaii, Manoa, HI 96822, USA
| | - Li Lin
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei 430070, PRChina
- Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, PRChina
| | - Junfa Yuan
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei 430070, PRChina
- Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, PRChina
| | - Min Wang
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei 430070, PRChina
- Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, PRChina
| | - Xueqin Liu
- Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, PRChina
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei 430070, PRChina
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13
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Dilcher M, Faye O, Faye O, Weber F, Koch A, Sadegh C, Weidmann M, Sall AA. Zahedan rhabdovirus, a novel virus detected in ticks from Iran. Virol J 2015; 12:183. [PMID: 26542354 PMCID: PMC4635997 DOI: 10.1186/s12985-015-0410-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 10/26/2015] [Indexed: 12/18/2022] Open
Abstract
Background Rhabdoviridae infect a wide range of vertebrates, invertebrates and plants. Their transmission can occur via various arthropod vectors. In recent years, a number of novel rhabdoviruses have been identified from various animal species, but so far only few tick-transmitted rhabdoviruses have been described. Methods We isolated a novel rhabdovirus, provisionally named Zahedan rhabdovirus (ZARV), from Hyalomma anatolicum anatolicum ticks collected in Iran. The full-length genome was determined using 454 next-generation sequencing and the phylogenetic relationship to other rhabdoviruses was analyzed. Inoculation experiments in mammalian Vero cells and mice were conducted and a specific PCR assay was developed. Results The complete genome of ZARV has a size of 11,230 nucleotides (nt) with the typical genomic organization of Rhabdoviridae. Phylogenetic analysis confirms that ZARV is closely related to Moussa virus (MOUV) from West Africa and Long Island tick rhabdovirus (LITRV) from the U.S., all forming a new monophyletic clade, provisionally designated Zamolirhabdovirus, within the Dimarhabdovirus supergroup. The glycoprotein (G) contains 12 conserved cysteins which are specific for animal rhabdoviruses infecting fish and mammals. In addition, ZARV is able to infect mammalian Vero cells and is lethal for mice when inoculated intracerebrally or subcutaneously. The developed PCR assay can be used to specifically detect ZARV. Conclusion The novel tick-transmitted rhabdovirus ZARV is closely related to MOUV and LITRV. All three viruses seem to form a new monophyletic clade. ZARV might be pathogenic for mammals, since it can infect Vero cells, is lethal for mice and its glycoprotein contains 12 conserved cysteins only found in animal rhabdoviruses. The mammalian host of ZARV remains to be identified.
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Affiliation(s)
- Meik Dilcher
- Department of Virology, Univerity Medical Center Göttingen, Kreuzbergring 57, 37075, Göttingen, Germany.
| | - Oumar Faye
- Institute Pasteur de Dakar, 36 Avenue Pasteur, BP 220, Dakar, Senegal.
| | - Ousmane Faye
- Institute Pasteur de Dakar, 36 Avenue Pasteur, BP 220, Dakar, Senegal.
| | - Franziska Weber
- Department of Virology, Univerity Medical Center Göttingen, Kreuzbergring 57, 37075, Göttingen, Germany.
| | - Andrea Koch
- Department of Virology, Univerity Medical Center Göttingen, Kreuzbergring 57, 37075, Göttingen, Germany.
| | | | - Manfred Weidmann
- Institute of Aquaculture, University of Stirling, Stirling, FK9 4LA, UK.
| | - Amadou Alpha Sall
- Institute Pasteur de Dakar, 36 Avenue Pasteur, BP 220, Dakar, Senegal.
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Wahli T, Bellec L, von Siebenthal B, Cabon J, Schmidt-Posthaus H, Morin T. First isolation of a rhabdovirus from perch Perca fluviatilis in Switzerland. DISEASES OF AQUATIC ORGANISMS 2015; 116:93-101. [PMID: 26480912 DOI: 10.3354/dao02908] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Perca fluviatilis is a fish species of increasing interest to the Swiss fish farming industry. In recent years, recirculation systems have been specifically set up to increase production. In one of these farms, abnormal spiral swimming associated with elevated mortalities occurred in repeated batches of imported perch shortly after stocking on several occasions. No bacterial or parasitic etiology was detected, but a virus grown in bluegill fry (BF-2) cells was identified as perch rhabdovirus. Subsequent investigations of other samples suggested a viral tropism for the central nervous system (CNS). Phylogenetic analysis of the partial N and entire G gene sequences positioned this isolate in genogroup C of the species Perch rhabdovirus, with high nucleotide and amino acid (aa) sequence identities with the DK5533 strain isolated in Denmark in 1989. Comparative studies using other closely related isolates allowed the distinction of 2 serological patterns among perch rhabdoviruses and the identification of a proline substitution by a serine in position 147 of the glycoprotein potentially involved in antigenic differentiation. Even if perch imported onto the farm tested negative by virus isolation prior to transport, they may have been the origin of this outbreak since CNS tissue was not included in the samples that were analyzed. Another possibility might be a sub-clinical infection with a viral load in resident fish too low to be detected. This study reports the first isolation of a perch rhabdovirus in Switzerland, and emphasizes the necessity of optimizing diagnostic tools that facilitate better control of the risks associated with fish translocation.
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Affiliation(s)
- Thomas Wahli
- Centre for Fish and Wildlife Health, Department of Infectious Diseases and Pathobiology, University of Bern, Laenggassstrasse 122, 3012 Bern, Switzerland
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15
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Virus genomes and virus-host interactions in aquaculture animals. SCIENCE CHINA-LIFE SCIENCES 2015; 58:156-69. [DOI: 10.1007/s11427-015-4802-y] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 10/29/2014] [Indexed: 12/20/2022]
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16
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Blasdell KR, Guzman H, Widen SG, Firth C, Wood TG, Holmes EC, Tesh RB, Vasilakis N, Walker PJ. Ledantevirus: a proposed new genus in the Rhabdoviridae has a strong ecological association with bats. Am J Trop Med Hyg 2014; 92:405-10. [PMID: 25487727 DOI: 10.4269/ajtmh.14-0606] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The Le Dantec serogroup of rhabdoviruses comprises Le Dantec virus from a human with encephalitis and Keuriliba virus from rodents, each isolated in Senegal. The Kern Canyon serogroup comprises a loosely connected set of rhabdoviruses many of which have been isolated from bats, including Kern Canyon virus from California, Nkolbisson virus from Cameroon, Central African Republic, and Cote d'Ivoire, Kolente virus from Guinea, Mount Elgon bat and Fikirini viruses from Kenya, and Oita virus from Japan. Fukuoka virus isolated from mosquitoes, midges, and cattle in Japan, Barur virus from a rodent in India and Nishimuro virus from pigs in Japan have also been linked genetically or serologically to this group. Here, we analyze the genome sequences and phylogenetic relationships of this set of viruses. We show that they form three subgroups within a monophyletic group, which we propose should constitute the new genus Ledantevirus.
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Affiliation(s)
- Kim R Blasdell
- CSIRO Biosecurity, Australian Animal Health Laboratory, Geelong, Victoria, Australia; Center for Biodefense and Emerging Infectious Diseases and Department of Pathology, Center for Tropical Diseases, and Institute for Human Infections and Immunity, The University of Texas Medical Branch, Galveston, Texas; Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas; Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Hilda Guzman
- CSIRO Biosecurity, Australian Animal Health Laboratory, Geelong, Victoria, Australia; Center for Biodefense and Emerging Infectious Diseases and Department of Pathology, Center for Tropical Diseases, and Institute for Human Infections and Immunity, The University of Texas Medical Branch, Galveston, Texas; Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas; Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Steven G Widen
- CSIRO Biosecurity, Australian Animal Health Laboratory, Geelong, Victoria, Australia; Center for Biodefense and Emerging Infectious Diseases and Department of Pathology, Center for Tropical Diseases, and Institute for Human Infections and Immunity, The University of Texas Medical Branch, Galveston, Texas; Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas; Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Cadhla Firth
- CSIRO Biosecurity, Australian Animal Health Laboratory, Geelong, Victoria, Australia; Center for Biodefense and Emerging Infectious Diseases and Department of Pathology, Center for Tropical Diseases, and Institute for Human Infections and Immunity, The University of Texas Medical Branch, Galveston, Texas; Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas; Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Thomas G Wood
- CSIRO Biosecurity, Australian Animal Health Laboratory, Geelong, Victoria, Australia; Center for Biodefense and Emerging Infectious Diseases and Department of Pathology, Center for Tropical Diseases, and Institute for Human Infections and Immunity, The University of Texas Medical Branch, Galveston, Texas; Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas; Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Edward C Holmes
- CSIRO Biosecurity, Australian Animal Health Laboratory, Geelong, Victoria, Australia; Center for Biodefense and Emerging Infectious Diseases and Department of Pathology, Center for Tropical Diseases, and Institute for Human Infections and Immunity, The University of Texas Medical Branch, Galveston, Texas; Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas; Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Robert B Tesh
- CSIRO Biosecurity, Australian Animal Health Laboratory, Geelong, Victoria, Australia; Center for Biodefense and Emerging Infectious Diseases and Department of Pathology, Center for Tropical Diseases, and Institute for Human Infections and Immunity, The University of Texas Medical Branch, Galveston, Texas; Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas; Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Nikos Vasilakis
- CSIRO Biosecurity, Australian Animal Health Laboratory, Geelong, Victoria, Australia; Center for Biodefense and Emerging Infectious Diseases and Department of Pathology, Center for Tropical Diseases, and Institute for Human Infections and Immunity, The University of Texas Medical Branch, Galveston, Texas; Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas; Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Peter J Walker
- CSIRO Biosecurity, Australian Animal Health Laboratory, Geelong, Victoria, Australia; Center for Biodefense and Emerging Infectious Diseases and Department of Pathology, Center for Tropical Diseases, and Institute for Human Infections and Immunity, The University of Texas Medical Branch, Galveston, Texas; Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas; Marie Bashir Institute for Infectious Diseases and Biosecurity, School of Biological Sciences and Sydney Medical School, Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
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17
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Ruane NM, Rodger HD, McCarthy LJ, Swords D, Dodge M, Kerr RC, Henshilwood K, Stone DM. Genetic diversity and associated pathology of rhabdovirus infections in farmed and wild perch Perca fluviatilis in Ireland. DISEASES OF AQUATIC ORGANISMS 2014; 112:121-130. [PMID: 25449323 DOI: 10.3354/dao02801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Rhabdovirus infections are an emerging problem for both wild and farmed freshwater fish in Northern Europe. In October 2005, a clinical outbreak with an approximate mortality rate of 40% occurred in a single batch of juvenile perch on a farm in the Republic of Ireland. Clinical signs developed slowly and were consistent with a perch rhabdovirus infection: signs included haemorrhages at the base of the fins and apparent impairment of the central nervous system (manifested as loss of equilibrium and erratic swimming behaviour). Studies suggest that the infected fish originated from a hatchery within the country which relied on wild fish broodstock to supplement the production of perch juveniles. A related rhabdovirus was subsequently isolated from this hatchery. Virus isolation studies have shown that rhabdoviruses were often isolated from wild fish in the vicinity of the hatchery between 1993 and 2005. All isolates were analysed using a generic primer set specific for the L gene of fish vesiculotype viruses. Phylogenetic analysis revealed that all isolates recovered from perch clustered together with the European lake trout rhabdovirus (903/87) of the genus Perhabdovirus. In addition to this, anguillid rhabdovirus was isolated from eel, and the partial L-gene sequence of a previously reported isolate from tench clustered with the pike fry rhabdoviruses, in the genus Sprivivirus.
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Affiliation(s)
- N M Ruane
- Fish Health Unit, Marine Institute, Rinville, Oranmore, Co. Galway, Ireland
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18
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Bellec L, Cabon J, Bergmann S, de Boisséson C, Engelsma M, Haenen O, Morin T, Olesen NJ, Schuetze H, Toffan A, Way K, Bigarré L. Evolutionary dynamics and genetic diversity from three genes of Anguillid rhabdovirus. J Gen Virol 2014; 95:2390-2401. [PMID: 25081977 DOI: 10.1099/vir.0.069443-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Wild freshwater eel populations have dramatically declined in recent past decades in Europe and America, partially through the impact of several factors including the wide spread of infectious diseases. The anguillid rhabdoviruses eel virus European X (EVEX) and eel virus American (EVA) potentially play a role in this decline, even if their real contribution is still unclear. In this study, we investigate the evolutionary dynamics and genetic diversity of anguiillid rhabdoviruses by analysing sequences from the glycoprotein, nucleoprotein and phosphoprotein (P) genes of 57 viral strains collected from seven countries over 40 years using maximum-likelihood and Bayesian approaches. Phylogenetic trees from the three genes are congruent and allow two monophyletic groups, European and American, to be clearly distinguished. Results of nucleotide substitution rates per site per year indicate that the P gene is expected to evolve most rapidly. The nucleotide diversity observed is low (2-3 %) for the three genes, with a significantly higher variability within the P gene, which encodes multiple proteins from a single genomic RNA sequence, particularly a small C protein. This putative C protein is a potential molecular marker suitable for characterization of distinct genotypes within anguillid rhabdoviruses. This study provides, to our knowledge, the first molecular characterization of EVA, brings new insights to the evolutionary dynamics of two genotypes of Anguillid rhabdovirus, and is a baseline for further investigations on the tracking of its spread.
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Affiliation(s)
- Laure Bellec
- European University of Brittany, France.,French Agency for Food, Environmental and Occupational Health & Safety, Ploufragan-Plouzané Laboratory, Unit Viral Disease of Fish, Plouzané, France
| | - Joelle Cabon
- European University of Brittany, France.,French Agency for Food, Environmental and Occupational Health & Safety, Ploufragan-Plouzané Laboratory, Unit Viral Disease of Fish, Plouzané, France
| | | | - Claire de Boisséson
- French Agency for Food, Environmental and Occupational Health & Safety, Ploufragan-Plouzané Laboratory, Unit Biosecurity and Viral Genetics, Ploufragan, France
| | - Marc Engelsma
- Central Veterinary Institute of Wageningen, Lelystad, The Netherlands
| | - Olga Haenen
- Central Veterinary Institute of Wageningen, Lelystad, The Netherlands
| | - Thierry Morin
- European University of Brittany, France.,French Agency for Food, Environmental and Occupational Health & Safety, Ploufragan-Plouzané Laboratory, Unit Viral Disease of Fish, Plouzané, France
| | - Niels Jørgen Olesen
- National Veterinary Institute, Technical University of Denmark, Åarhus, Denmark
| | | | - Anna Toffan
- Research & Innovation Department, Division of Biomedical Science, Legnaro, Italy
| | - Keith Way
- Centre for Environment, Fisheries and Aquaculture Science, Weymouth, UK
| | - Laurent Bigarré
- European University of Brittany, France.,French Agency for Food, Environmental and Occupational Health & Safety, Ploufragan-Plouzané Laboratory, Unit Viral Disease of Fish, Plouzané, France
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19
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Xiao Y, Shao L, Zhang C, An W. Genomic evidence of homologous recombination in spring viremia of carp virus: a negatively single stranded RNA virus. Virus Res 2014; 189:271-9. [PMID: 24954789 DOI: 10.1016/j.virusres.2014.06.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Revised: 06/01/2014] [Accepted: 06/11/2014] [Indexed: 10/25/2022]
Abstract
A new strain of spring viraemia of carp virus, denominated SVCV-265, was isolated from an ornamental common carp (Cyprinus carpio) in Shanghai, China, 2013. The isolate could produce obvious cytopathic effects on EPC cells, while was shown to be of low virulence for juvenile koi. Complete genome sequencing revealed the genome of the SVCV-265 strain is 11,029 nucleotides in length and phylogenetic analysis showed the isolate was clustered within Asia clade but was divergent from Chinese A1, A2 and BJ0505-2 strains. Previous report indicated that the G and P gene of SVCV shared similar topologies of evolutionary trees. In this study, phylogenetic analysis based on the P gene sequences showed the SVCV-265 was clustered into Iai subgroup and divergent from Chinese isolates A1, A2 and BJ0505-2, which were clustered into Iaii group. However, sequence alignment of the G gene showed the SVCV-265 has a close relationship with A1, A2 and BJ0505-2 isolates. Recombination analysis of all the whole sequences of SVCV available revealed isolates A2 and BJ0505-2 were likely the homologous recombination descendants of the A1 and SVCV-265. The crossover regions were located between 3845-6387nt for A2 and 3573-6444 nt for BJ0505-2, respectively. Phylogenetic analysis of the crossover region further confirmed these findings. This current study describes the molecular characterization of the new isolate SVCV-265 from China and is the first report of homologous recombination in SVCV.
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Affiliation(s)
- Yu Xiao
- Shanghai Fisheries Research Institute, Shanghai Fisheries Technical Extension Station, Shanghai 200433, China
| | - Ling Shao
- Shanghai Fisheries Research Institute, Shanghai Fisheries Technical Extension Station, Shanghai 200433, China.
| | - Chongwen Zhang
- Shanghai Fisheries Research Institute, Shanghai Fisheries Technical Extension Station, Shanghai 200433, China
| | - Wei An
- Shanghai Fisheries Research Institute, Shanghai Fisheries Technical Extension Station, Shanghai 200433, China
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20
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Tokarz R, Sameroff S, Leon MS, Jain K, Lipkin WI. Genome characterization of Long Island tick rhabdovirus, a new virus identified in Amblyomma americanum ticks. Virol J 2014; 11:26. [PMID: 24517260 PMCID: PMC3928085 DOI: 10.1186/1743-422x-11-26] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 02/10/2014] [Indexed: 01/08/2023] Open
Abstract
Background Ticks are implicated as hosts to a wide range of animal and human pathogens. The full range of microbes harbored by ticks has not yet been fully explored. Methods As part of a viral surveillance and discovery project in arthropods, we used unbiased high-throughput sequencing to examine viromes of ticks collected on Long Island, New York in 2013. Results We detected and sequenced the complete genome of a novel rhabdovirus originating from a pool of Amblyomma americanum ticks. This virus, which we provisionally name Long Island tick rhabdovirus, is distantly related to Moussa virus from Africa. Conclusions The Long Island tick rhabdovirus may represent a novel species within family Rhabdoviridae.
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Affiliation(s)
- Rafal Tokarz
- Center for Infection and Immunity, Mailman School of Public Health, Columbia University, 722 West 168th Street, Room 1701, New York, NY 10032, USA.
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21
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Ou T, Zhu RL, Chen ZY, Zhang QY. Isolation and identification of a lethal rhabdovirus from farmed rice field eels Monopterus albus. DISEASES OF AQUATIC ORGANISMS 2013; 106:197-206. [PMID: 24191997 DOI: 10.3354/dao02660] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We provide the first description of a virus responsible for a systemic hemorrhagic disease causing high mortality in farmed rice field eels Monopterus albus in China. Typical signs exhibited by the diseased fish were extensive hemorrhages in the skin and viscera and some neurological signs, such as loss of equilibrium and disorganized swimming. Histopathological examination revealed various degrees of necrosis within the spleen and liver. Virus isolation was attempted from visceral tissues of diseased fish by inoculation on 6 fish cell lines. Typical cytopathic effects (CPE) were produced in bluegill fry (BF2) cells, so this cell line was chosen for further isolation and propagation of the virus. Electron microscopy observation showed that the negative stained viral particles had the characteristic bullet shape of rhabdoviruses and an estimated size of 60 × 120 nm. We therefore tentatively refer to this virus as Monopterus albus rhabdovirus (MoARV). Molecular characterization of MoARV, including sequence analysis of the nucleoprotein (N), phosphoprotein (P), and glycoprotein (G) genes, revealed 94.5 to 97.3% amino acid similarity to that of Siniperca chuatsi rhabdovirus. Phylogenetic analysis based on the amino acid sequences of N and G proteins indicated that MoARV should be a member of the genus Vesiculovirus. Koch's postulates were fulfilled by infecting healthy rice field eels with MoARV, which produced an acute infection. RT-PCR analysis demonstrated that MoARV RNA could be detected in both naturally and experimentally infected fish. The data suggest that MoARV was the causative pathogen of the disease.
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Affiliation(s)
- Tong Ou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Graduate University of Chinese Academy of Sciences, Wuhan 430072, PR China
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Gadd T, Viljamaa-Dirks S, Holopainen R, Koski P, Jakava-Viljanen M. Characterization of perch rhabdovirus (PRV) in farmed grayling Thymallus thymallus. DISEASES OF AQUATIC ORGANISMS 2013; 106:117-127. [PMID: 24113245 DOI: 10.3354/dao02654] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Two Finnish fish farms experienced elevated mortality rates in farmed grayling Thymallus thymallus fry during the summer months, most typically in July. The mortalities occurred during several years and were connected with a few neurological disorders and peritonitis. Virological investigation detected an infection with an unknown rhabdovirus. Based on the entire glycoprotein (G) and partial RNA polymerase (L) gene sequences, the virus was classified as a perch rhabdovirus (PRV). Pairwise comparisons of the G and L gene regions of grayling isolates revealed that all isolates were very closely related, with 99 to 100% nucleotide identity, which suggests the same origin of infection. Phylogenetic analysis demonstrated that they were closely related to the strain isolated from perch Perca fluviatilis and sea trout Salmo trutta trutta caught from the Baltic Sea. The entire G gene sequences revealed that all Finnish grayling isolates, and both the perch and sea trout isolates, were most closely related to a PRV isolated in France in 2004. According to the partial L gene sequences, all of the Finnish grayling isolates were most closely related to the Danish isolate DK5533 from pike. The genetic analysis of entire G gene and partial L gene sequences showed that the Finnish brown trout isolate ka907_87 shared only approximately 67 and 78% identity, respectively, with our grayling isolates. The grayling isolates were also analysed by an immunofluorescence antibody test. This is the first report of a PRV causing disease in grayling in Finland.
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Affiliation(s)
- Tuija Gadd
- Finnish Food Safety Authority Evira, Mustialankatu 3, 00790 Helsinki, Finland
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