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https://www.readbyqxmd.com/read/29150915/epidemiology-of-rhdv2-lagovirus-europaeus-gi-2-in-free-living-wild-european-rabbits-in-portugal
#1
C Rouco, J Abrantes, A Serronha, A M Lopes, E Maio, M J Magalhães, E Blanco, J Bárcena, P J Esteves, N Santos, P C Alves, P Monterroso
As the detection of the first outbreak of a novel aetiological agent of rabbit haemorrhagic disease commonly called RHDV2 or RHDVb (Lagovirus europaeus/GI.2, henceforth GI.2) in France in 2010, the virus rapidly spread throughout continental Europe and nearby islands such as Great Britain, Sardinia, Sicily, the Azores and the Canary Islands among others. The outbreaks of this new lagovirus cause important economic losses in rabbitries, and ecological disruptions by affecting the conservation of rabbit-sensitive top predators...
November 17, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29141631/detection-of-rabbit-haemorrhagic-disease-virus-2-during-the-wild-rabbit-oryctolagus-cuniculus-eradication-from-the-berlengas-archipelago-portugal
#2
F A Abade Dos Santos, C Carvalho, Oliveira Nuno, J J Correia, M Henriques, M C Peleteiro, M Fevereiro, M D Duarte
BACKGROUND: In the regular wildlife monitoring action carried out in the summer of the past few years at the Berlenga Island, wild rabbits (Oryctolagus cuniculus) have been repeatedly found dead. However, the origin of those deaths was never investigated. Our aim was to investigate the cause of death of 11 rabbits collected between April and May 2016. RESULTS: While screening samples from rabbit carcasses for the major viral rabbit pathogens, five tested positive to RHDV2 but all were negative for RHDV and myxoma virus (MYXV)...
November 15, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29093089/rabbit-haemorrhagic-disease-virus-2-gi-2-is-replacing-endemic-strains-of-rhdv-in-the-australian-landscape-within-18-months-of-its-arrival
#3
Jackie E Mahar, Robyn N Hall, David Peacock, John Kovaliski, Melissa Piper, Roslyn Mourant, Nina Huang, Susan Campbell, Xingnian Gu, Andrew Read, Nadya Urakova, Tarnya Cox, Edward C Holmes, Tanja Strive
Rabbit haemorrhagic disease virus 2 (RHDV2; Lagovirus GI.2) is a pathogenic calicivirus that affects European rabbits (Oryctolagus cuniculus) and various hare (Lepus) species. GI.2 was first detected in France in 2010 and subsequently caused epidemics in wild and domestic lagomorph populations throughout Europe. In May 2015 GI.2 was detected in Australia. Within 18 months of its initial detection GI.2 had spread to all Australian states and territories and rapidly became the dominant circulating strain, replacing Rabbit haemorrhagic disease virus (RHDV/GI...
November 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29080562/large-scale-lagovirus-disease-outbreaks-in-european-brown-hares-lepus-europaeus-in-france-caused-by-rhdv2-strains-spatially-shared-with-rabbits-oryctolagus-cuniculus
#4
Ghislaine Le Gall-Reculé, Evelyne Lemaitre, Stéphane Bertagnoli, Céline Hubert, Sokunthea Top, Anouk Decors, Stéphane Marchandeau, Jean-Sébastien Guitton
Rabbit haemorrhagic disease virus (RHDV) is a lagovirus that causes rabbit haemorrhagic disease (RHD) in European rabbits (Oryctolagus cuniculus). In 2010, a new genotype called RHDV2 emerged in France. It exhibits a larger host range than classical RHDV strains by sporadically infecting different hare species, including the European hare (Lepus europaeus). Phylogenetic analyses revealed that closely related RHDV2 strains circulate locally in both hares and rabbits, and therefore that RHDV2 strains infecting hares do not belong to a lineage that has evolved only in this species...
October 28, 2017: Veterinary Research
https://www.readbyqxmd.com/read/29051566/characterization-of-old-rhdv-strains-by-complete-genome-sequencing-identifies-a-novel-genetic-group
#5
Ana M Lopes, Diogo Silvério, Maria J Magalhães, Helena Areal, Paulo C Alves, Pedro J Esteves, Joana Abrantes
Rabbit hemorrhagic disease (RHD) is a veterinary disease that affects the European rabbit and has a significant economic and ecological negative impact. In Portugal, rabbit hemorrhagic disease virus (RHDV) was reported in 1989 and still causes enzootic outbreaks. Several recombination events have been detected in RHDV strains, including in the first reported outbreak. Here we describe the occurrence of recombination in RHDV strains recovered from rabbit and Iberian hare samples collected in the mid-1990s in Portugal...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29040958/the-potential-protective-role-of-akropower-against-atrazine-induced-humoral-immunotoxicity-in-rabbits
#6
Ashraf M Morgan, Marwa A Ibrahim, Ahmed M Hussien
Introduction to the herbicide Atrazine (ATR) can bring about immunotoxicity, aside from other unfavorable results for the creature and human wellbeing. We went for clarifying the genotoxic mechanisms required in humoral immunotoxicity of Gesaprim(®) (ATR) and their constriction by Akropwer. Forty rabbits (1.5kg±20%) were utilized and appointed into 4 equal groups. group 1: control; group 2: Received Atrazine at 1/10 LD50 via food; group 3: Received Akropwer at 1ml/1l/day by means of drinking water; group 4: Received both Atrazine and Akropwer associatively by the same said dosage and course...
October 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29024672/conventional-and-real-time-rt-pcr-assays-for-the-detection-and-differentiation-of-variant-rabbit-hemorrhagic-disease-virus-rhdvb-and-its-recombinants
#7
K P Dalton, J L Arnal, A A Benito, G Chacón, J M Martín Alonso, F Parra
Since its emergence, variant RHDV (RHDVb/RHDV2) has spread throughout the Iberian Peninsula aided by the apparent lack of cross protection provided by classic (genogroup 1; G1) strain derived vaccines. In addition to RHDVb, full-length genome sequencing of RHDV strains has recently revealed the circulation of recombinant viruses on the Iberian Peninsula. These recombinant viruses contain the RHDVb structural protein encoding sequences and the non-structural coding regions of either pathogenic RHDV-G1 strains or non-pathogenic (np) rabbit caliciviruses...
January 2018: Journal of Virological Methods
https://www.readbyqxmd.com/read/28941616/elisa-for-detection-of-variant-rabbit-haemorrhagic-disease-virus-rhdv2-antigen-in-liver-extracts
#8
K P Dalton, A Podadera, V Granda, I Nicieza, D Del Llano, R González, J R de Los Toyos, M García Ocaña, F Vázquez, J M Martín Alonso, J M Prieto, F Parra, R Casais
The emergence and rapid spread of variant of the rabbit hemorrhagic disease virus (RHDV2) require new diagnostic tools to ensure that efficient control measures are adopted. In the present study, a specific sandwich enzyme-linked immunosorbent assay (ELISA) for detection of RHDV2 antigens in rabbit liver homogenates, based on the use of an RHDV2-specific monoclonal antibody (Mab) 2D9 for antigen capture and an anti-RHDV2 goat polyclonal antibody (Pab), was developed. This ELISA was able to successfully detect RHDV2 and RHDV2 recombinant virions with high sensitivity (100%) and specificity (97...
January 2018: Journal of Virological Methods
https://www.readbyqxmd.com/read/28935204/the-taishan-robinia-pseudoacacia-polysaccharides-enhance-immune-effects-of-rabbit-haemorrhagic-disease-virus-inactivated-vaccines
#9
Shifa Yang, Guiming Li, Zengcheng Zhao, Minyan Feng, Jian Fu, Zhongli Huang, Minxun Song, Shuqian Lin
Robinia pseudoacacia flower, a common component in traditional Chinese medicine, has long been well-known for its high pharmaceutical value. This study aimed to assess the immunopotentiating effects of Taishan Robinia Pseudoacacia polysaccharides (TRPPS) in rabbits inoculated with a rabbit haemorrhagic disease virus (RHDV) inactivated vaccine. The rabbits were administered with the RHDV vaccine in conjunction with varying concentrations of TRPPS, and their blood samples were collected at different time points to analyze the ratio and number of blood lymphocytes...
September 18, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28815049/multi-target-chimaeric-vlp-as-a-therapeutic-vaccine-in-a-model-of-colorectal-cancer
#10
Braeden Donaldson, Farah Al-Barwani, Simon J Pelham, Katie Young, Vernon K Ward, Sarah L Young
BACKGROUND: Colorectal cancer is responsible for almost 700,000 deaths annually worldwide. Therapeutic vaccination is a promising alternative to conventional treatment for colorectal cancer, using vaccines to induce targeted immune responses against tumour-associated antigens. In this study, we have developed chimaeric virus-like particles (VLP), a form of non-infectious non-replicative subunit vaccine consisting of rabbit haemorrhagic disease virus (RHDV) VP60 capsid proteins containing recombinantly inserted epitopes from murine topoisomerase IIα and survivin...
2017: Journal for Immunotherapy of Cancer
https://www.readbyqxmd.com/read/28806910/multi-target-chimaeric-vlp-as-a-therapeutic-vaccine-in-a-model-of-colorectal-cancer
#11
Braeden Donaldson, Farah Al-Barwani, Simon J Pelham, Katie Young, Vernon K Ward, Sarah L Young
BACKGROUND: Colorectal cancer is responsible for almost 700,000 deaths annually worldwide. Therapeutic vaccination is a promising alternative to conventional treatment for colorectal cancer, using vaccines to induce targeted immune responses against tumour-associated antigens. In this study, we have developed chimaeric virus-like particles (VLP), a form of non-infectious non-replicative subunit vaccine consisting of rabbit haemorrhagic disease virus (RHDV) VP60 capsid proteins containing recombinantly inserted epitopes from murine topoisomerase IIα and survivin...
August 15, 2017: Journal for Immunotherapy of Cancer
https://www.readbyqxmd.com/read/28780630/binding-of-rabbit-hemorrhagic-disease-virus-like-particles-to-host-histo-blood-group-antigens-is-blocked-by-antisera-from-experimentally-vaccinated-rabbits
#12
Yanhua Song, Zhiyu Fan, Yuanyuan Zuo, Houjun Wei, Bo Hu, Mengmeng Chen, Rulong Qiu, Jiabin Xue, Fang Wang
During infection host histo-blood group antigens (HBGAs) act as attachment factors that interact with rabbit hemorrhagic disease virus (RHDV) and participate in the infectious process. In the present study, baculovirus expressing recombinant RHDV capsid protein (VP60r) as a vaccine immunogen was used to test its antigenicity and immunogenicity via immunization experiments. Each group of rabbits immunized with VP60r was found to be fully protected against RHDV challenge. The duration of immunity of the vaccine following the inoculation of a single dose was determined to be at least 240 days...
November 2017: Archives of Virology
https://www.readbyqxmd.com/read/28763035/a-motif-in-the-f-homomorph-of-rabbit-haemorrhagic-disease-virus-polymerase-is-important-for-the-subcellular-localisation-of-the-protein-and-its-ability-to-induce-redistribution-of-golgi-membranes
#13
Nadya Urakova, Andrew C Warden, Peter A White, Tanja Strive, Michael Frese
Rabbit haemorrhagic disease virus (RHDV) is a calicivirus that infects and frequently kills rabbits. Previously, we showed that the RHDV RNA-dependent RNA polymerase (RdRp) is associated with distinct, but yet uncharacterised subcellular structures and is capable of inducing a redistribution of Golgi membranes. In this study, we identified a partially hidden hydrophobic motif that determines the subcellular localisation of recombinant RHDV RdRp in transfected cells. This novel motif, 189LLWGCDVGVAVCAAAVFHNICY210, is located within the F homomorph, between the conserved F3 and A motifs of the core RdRp domain...
August 1, 2017: Viruses
https://www.readbyqxmd.com/read/28743597/adaptive-diversification-between-the-classic-rabbit-hemorrhagic-disease-virus-rhdv-and-the-rhdva-isolates-a-genome-wide-perspective
#14
Yan Li, Xueping Yao, Ying Li, Feifei Xu, Zexiao Yang
Rabbit haemorrhagic disease virus (RHDV) is a highly infectious pathogen that causes high mortality in wild and domestic rabbits. RHDV could be divided into two subtypes, classic RHDV and RHDVa, which present clear genetic, antigenic, and epidemiological differences. To further understand the nature of the diversity, we performed a genome-wide evolutionary study on the classic RHDV and RHDVa isolates. The results show that RHDV had experienced adaptive diversification with the dividing process of these subtypes...
July 22, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28714849/proposal-for-a-unified-classification-system-and-nomenclature-of-lagoviruses
#15
Jacques Le Pendu, Joana Abrantes, Stéphane Bertagnoli, Jean-Sébastien Guitton, Ghislaine Le Gall-Reculé, Ana Margarida Lopes, Stéphane Marchandeau, Fernando Alda, Tereza Almeida, Alves Paulo Célio, Juan Bárcena, Galina Burmakina, Esther Blanco, Carlos Calvete, Patrizia Cavadini, Brian Cooke, Kevin Dalton, Miguel Delibes Mateos, Wieslaw Deptula, John Sebastian Eden, Fang Wang, Catarina C Ferreira, Paula Ferreira, Pilar Foronda, David Gonçalves, Dolores Gavier-Widén, Robin Hall, Beata Hukowska-Szematowicz, Peter Kerr, John Kovaliski, Antonio Lavazza, Jackie Mahar, Alexander Malogolovkin, Raquel M Marques, Sara Marques, Aaron Martin-Alonso, Pedro Monterroso, Sacramento Moreno, Greg Mutze, Aleksija Neimanis, Paulina Niedzwiedzka-Rystwej, David Peacock, Francisco Parra, Mara Rocchi, Carlos Rouco, Nathalie Ruvoën-Clouet, Eliane Silva, Diogo Silvério, Tanja Strive, Gertrudes Thompson, Beata Tokarz-Deptula, Pedro Esteves
Lagoviruses belong to the Caliciviridae family. They were first recognized as highly pathogenic viruses of the European rabbit (Oryctolagus cuniculus) and European brown hare (Lepus europaeus) that emerged in the 1970-1980s, namely, rabbit haemorrhagic disease virus (RHDV) and European brown hare syndrome virus (EBHSV), according to the host species from which they had been first detected. However, the diversity of lagoviruses has recently expanded to include new related viruses with varying pathogenicity, geographic distribution and host ranges...
July 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28702932/phylogenetic-analysis-of-rabbit-haemorrhagic-disease-virus-rhdv-strains-isolated-in-poland
#16
Andrzej Fitzner, Wieslaw Niedbalski
The aim of this study was to characterise the nucleotide and amino acid sequence of complete genomes (7.5 kb) from RHDV strains isolated in Poland and estimate the genetic variability in different elements of the viral RNA. In addition, the sequence of Polish RHDV isolates isolated from 1988-2015 was compared with the sequences of other European RHDV, including the RHDVa and RHDV2/RHDVb subtypes. The complete sequence was developed by the compilation of partial nucleotide sequences. This sequence consisted of approximately 7428 nucleotides...
July 12, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28689774/expression-of-il-1ra-il-6-il-8-il-18-tnf-%C3%AE-and-ifn-%C3%AE-genes-in-peripheral-blood-leukocytes-of-rabbits-infected-with-rhdv-rabbit-haemorrhagic-disease-virus
#17
Alicja Trzeciak-Ryczek, Beata Tokarz-Deptuła, Wiesław Deptuła
Rabbit haemorrhagic disease virus (RHDV) induces a highly contagious and extremely lethal disease that fulfils many requirements of an animal model of fulminant hepatic failure (FHF); however, the pathogenesis of RHD has still not been fully elucidated. Cytokines play an important role in regulation of the immune response and pathogenesis of many diseases, including those caused by viral infections. Furthermore, recent studies indicate a role of the immune response, especially peripheral blood leukocytes (PBL), in the pathogenesis of RHD...
July 8, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28667769/resistance-to-rhd-virus-in-wild-australian-rabbits-comparison-of-susceptible-and-resistant-individuals-using-a-genomewide-approach
#18
Nina I Schwensow, Harald Detering, Stephen Pederson, Camila Mazzoni, Ron Sinclair, David Peacock, John Kovaliski, Brian Cooke, Jörns Fickel, Simone Sommer
Deciphering the genes involved in disease resistance is essential if we are to understand host-pathogen coevolutionary processes. The rabbit haemorrhagic disease virus (RHDV) was imported into Australia in 1995 as a biocontrol agent to manage one of the most successful and devastating invasive species, the European rabbit (Oryctolagus cuniculus). During the first outbreaks of the disease, RHDV caused mortality rates of up to 97%. Recently, however, increased genetic resistance to RHDV has been reported. Here, we have aimed to identify genomic differences between rabbits that survived a natural infection with RHDV and those that died in the field using a genomewide next-generation sequencing (NGS) approach...
July 1, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28653384/in-this-issue-july-2017-rhdv-vaccine-protects-against-both-strains-of-virus-%C3%A2-%C3%A2-%C3%A2-olfactory-neuroblastoma-in-a-malamute-%C3%A2-%C3%A2-%C3%A2-coincidental-conditions-affecting-dysphagia-in-a-miniature-poodle-%C3%A2-%C3%A2-%C3%A2-support-for-storing-high-quality-bovine-colostrum-%C3%A2-%C3%A2-%C3%A2-sarcoptic
#19
EDITORIAL
https://www.readbyqxmd.com/read/28653381/efficacy-of-a-commercial-vaccine-against-different-strains-of-rabbit-haemorrhagic-disease-virus
#20
A J Read, P D Kirkland
BACKGROUND: This study investigated the ability of a commercial rabbit haemorrhagic disease virus (RHDV) vaccine (Cylap®) to protect rabbits from disease caused by two different strains of the virus (v351 and K5) that are used or proposed to be used for wild rabbit control in Australia. These strains of the RHDV1 genotype belong to the 'classical RHDV' and 'antigenic variant RHDVa' subtypes, respectively. METHODS: Vaccinated rabbits were exposed to very high doses of the virus either by direct oral dosing or by exposure to infected rabbit livers...
July 2017: Australian Veterinary Journal
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