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Infectious bursal disease virus

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https://www.readbyqxmd.com/read/29427596/structural-and-functional-modeling-of-viral-protein-5-of-infectious-bursal-disease-virus
#1
Bhaskar Ganguly, Sunil Kumar Rastogi
Infectious Bursal Disease (IBD) is an acute, highly contagious and immunosuppressive disease of young chicken. The causative virus (IBDV) is a bi-segmented, double-stranded RNA virus. The virus encodes five major proteins, viral protein (VP) 1-5. VPs 1-4 have been characterized crystallographically. Albeit a rise in the number of studies reporting successful heterologous expression of VP5 in recent times, challenging the notion that rapid death of host cells overexpressing VP5 disallows obtaining sufficiently pure preparations of the protein for crystallographic studies, the structure of VP5 remains unknown and its function controversial...
February 7, 2018: Virus Research
https://www.readbyqxmd.com/read/29409800/infectious-bursal-disease-virus-in-algeria-detection-of-a-novel-lineage-of-highly-pathogenic-reassortant-viruses
#2
Mouna Abed, Sébastien Soubies, Céline Courtillon, François-Xavier Briand, Chantal Allee, Michel Amelot, Claire De Boisseson, Pierrick Lucas, Yannick Blanchard, Ali Belahouel, Redouane Kara, Abdelhalim Essalhi, Soraya Temim, Djamel Khelef, Nicolas Eterradossi
Infectious bursal disease (IBD) is an immunosuppressive viral disease, present worldwide, which causes mortality and immunosuppression in young chickens. The causative agent, the Avibirnavirus IBDV, is a non-enveloped virus whose genome consists of two segments (A and B) of double-stranded RNA. Different pathotypes of IBDV exist, ranging from attenuated vaccine strains to very virulent viruses (vvIBDV). In Algeria, despite the prophylactic measures implemented, cases of IBD are still often diagnosed clinically and the current molecular epidemiology of IBDV remains unknown...
January 30, 2018: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29391066/recombinant-chicken-interleukin-7-as-a-potent-adjuvant-increases-the-immunogenicity-and-protection-of-inactivated-infectious-bursal-disease-vaccine
#3
Dan Cui, Jianlou Zhang, Yuzhu Zuo, Shanshan Huo, Yonghong Zhang, Liyue Wang, Xiujin Li, Fei Zhong
Our previous work showed that a plasmid-based chicken interleukin-7 (chIL-7) gene expression vector possessed potent adjuvant activity for a VP2 DNA vaccine against chicken infectious bursal disease virus (IBDV). Whether recombinant chIL-7 prepared in procaryotic expression system has the adjuvant activity for inactivated IBDV vaccine remains unknown. Here, we prepared recombinant chIL-7 using an E. coli expression system and analyzed its adjuvant activity for the inactivated IBDV vaccine. The results show that the recombinant chIL-7 was successfully prepared in E...
February 1, 2018: Veterinary Research
https://www.readbyqxmd.com/read/29390031/infectious-bursal-disease-virus-infection-leads-to-changes-in-the-gut-associated-lymphoid-tissue-and-the-microbiota-composition
#4
Li Li, Tereza Kubasová, Ivan Rychlik, Frederic J Hoerr, Silke Rautenschlein
Infectious bursal disease (IBD) is an acute, highly contagious and immunosuppressive poultry disease. IBD virus (IBDV) is the causative agent, which may lead to high morbidity and mortality rates in susceptible birds. IBDV-pathogenesis studies have focused mainly on primary lymphoid organs. It is not known if IBDV infection may modify the development of the gut associated lymphoid tissues (GALT) as well as the microbiota composition. The aim of the present study was to investigate the effects of IBDV-infection on the bursa of Fabricius (BF), caecal tonsils (CT) and caecum, and to determine the effects on the gut microbiota composition in the caecum...
2018: PloS One
https://www.readbyqxmd.com/read/29373488/a-review-of-eight-high-priority-economically-important-viral-pathogens-of-poultry-within-the-caribbean-region
#5
REVIEW
Arianne Brown Jordan, Victor Gongora, Dane Hartley, Christopher Oura
Viral pathogens cause devastating economic losses in poultry industries worldwide. The Caribbean region, which boasts some of the highest rates of poultry consumption in the world, is no exception. This review summarizes evidence for the circulation and spread of eight high-priority, economically important poultry viruses across the Caribbean region. Avian influenza virus (AIV), infectious bronchitis virus (IBV), Newcastle disease virus (NDV), infectious laryngotracheitis virus (ILTV), avian metapneumovirus (aMPV), infectious bursal disease virus (IBDV), fowl adenovirus group 1 (FADV Gp1), and egg drop syndrome virus (EDSV) were selected for review...
January 26, 2018: Veterinary Sciences
https://www.readbyqxmd.com/read/29372383/surface-igm-%C3%AE-light-chain-is%C3%A2-involved-in-the%C3%A2-binding-and-infection-of-infectious-bursal-disease-virus-ibdv-to-dt40-cells
#6
Jiaqi Chi, Leiming You, Peipei Li, Man Teng, Gaiping Zhang, Jun Luo, Aiping Wang
Infectious bursal disease virus (IBDV) is an important immunosuppressive virus in chickens. Surface immunoglobulin M (sIgM)-bearing B lymphocytes act as the major targets of IBDV in the bursa of Fabricius, and sIgM may function as one of the membrane binding sites responsible for IBDV infection. Recently, using the virus overlay protein binding assay, the chicken λ light chain of sIgM was identified to specifically interact with IBDV in a virulence-independent manner in vitro. To further investigate sIgM λ light chain-mediated IBDV binding and infection in pre-B cells, the cell line DT40, which is susceptible to both pathogenic and attenuated IBDV, was used...
January 25, 2018: Virus Genes
https://www.readbyqxmd.com/read/29361703/detection-of-antibodies-to-seven-priority-pathogens-in-backyard-poultry-in-trinidad-west-indies
#7
Arianne Brown Jordan, Pompei Bolfa, Silvia Marchi, Shakera Hemmings, Tashard Major, Rod Suepaul, Lemar Blake, Christopher Oura
Backyard poultry farms in Trinidad and Tobago (T&T) play a vital role in providing food and income for rural communities. There is currently no information on the presence and circulation of pathogens in backyard poultry farms in T&T, and little is known in relation to the potential risks of spread of these pathogens to the commercial poultry sector. In order to address this, serum samples were collected from 41 chickens on five backyard farms taken from selected locations in Trinidad. Samples were tested for antibodies to seven priority pathogens of poultry by enzyme-linked immunosorbent assay (ELISA)...
January 20, 2018: Veterinary Sciences
https://www.readbyqxmd.com/read/29340165/nitric-oxide-induced-by-indian-ginseng-root-extract-inhibits-infectious-bursal-disease-virus-in-chicken-embryo-fibroblasts-in-vitro
#8
Bhaskar Ganguly, Vijaypillai Umapathi, Sunil Kumar Rastogi
Infectious Bursal Disease is a severe viral disease of chicken responsible for serious economic losses to poultry farmers. The causative agent, Infectious Bursal Disease virus, is inhibited by nitric oxide. Root extract of the Indian ginseng, Withania somnifera, inhibits Infectious Bursal Disease virus in vitro. Also, Withania somnifera root extract is known to induce nitric oxide production in vitro. Therefore, the present study was undertaken to determine if the inhibitory activity of Withania somnifera against Infectious Bursal Disease virus was based on the production of nitric oxide...
2018: Journal of Animal Science and Technology
https://www.readbyqxmd.com/read/29290477/early-immune-responses-and-profiling-of-cell-mediated-immunity-associated-gene-expression-in-response-to-rhvt-ibd-vaccination
#9
Fiona Ingrao, Fabienne Rauw, Mieke Steensels, Thierry van den Berg, Bénédicte Lambrecht
Infectious bursal disease (IBD) remains a major threat to the poultry industry. Recombinant herpesvirus of turkey (rHVT)-IBD vaccines have been successfully used to induce a protective immune response against IBD. However, the capacity for rHVT-IBD vaccines to induce early protection without detectable antibodies, and the underlying mechanisms mediating specific cell-mediated responses in the early stages following vaccination, have been poorly investigated. Therefore, in this study, specific pathogen-free (SPF) chickens were vaccinated with rHVT-IBD and T-cell subsets were analyzed...
January 29, 2018: Vaccine
https://www.readbyqxmd.com/read/29290303/serological-evidence-for-eight-globally-important-poultry-viruses-in-trinidad-tobago
#10
Arianne Brown Jordan, Jamie Sookhoo, Lemar Blake, Paul Crooks, Zul Mohammed, Judy Molawatti-Bisnath, Christine V F Carrington, Christopher A L Oura
Viruses affecting poultry cause significant levels of disease leading to severe economic losses among poultry farmers worldwide. The Americas region continues to be vulnerable to the spread of poultry viruses across the continents and Caribbean island chains. In Trinidad and Tobago (T&T) there is limited information on the viruses circulating in poultry. Many flock are vulnerable to infection and there are occasional outbreaks of disease resulting in high levels of morbidity and mortality. This study aims to identify important viruses of poultry circulating in T&T through a broad-based surveillance approach...
January 1, 2018: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/29289381/recombinant-lactococcus-lactis-co-expressing-omph-of-an-m-cell-targeting-ligand-and-ibdv-vp2-protein-provide-immunological-protection-in-chickens
#11
Linlin Liu, Wang Zhang, Yuxin Song, Wenqian Wang, Yuan Zhang, Tingting Wang, Kai Li, Qing Pan, Xiaole Qi, Yulong Gao, Li Gao, Changjun Liu, Yanping Zhang, Yongqiang Wang, Gaoming He, Xiaomei Wang, Hongyu Cui
Infectious bursal disease virus (IBDV) is a highly contagious disease that results in enormous economic losses in the global poultry sector. Lactic acid bacteria are an appealing vehicle for the safe and effective delivery of heterologous protein antigens. Oral administration of the commensal bacterium Lactococcus lactis expressing recombinant fusion proteins has been used to elicit mucosal and systemic immune responses. In this study, a Lactococcus lactis NZ3900 strain co-expressing the outer membrane protein (Omp) H of the microfold (M) cell-targeting ligand and the viral capsid protein (VP)2 antigen of IBDV was genetically engineered, and its immunopotentiating capacity as an oral and injected vaccine in chickens was evaluated...
January 29, 2018: Vaccine
https://www.readbyqxmd.com/read/29273342/the-association-of-ribosomal-protein-l18-rpl18-with-infectious-bursal-disease-virus-viral-protein-vp3-enhances-viral-replication
#12
Bin Wang, Xueyan Duan, Mengjiao Fu, Yanan Liu, Yongqiang Wang, Xiaoqi Li, Hong Cao, Shijun J Zheng
Infectious bursal disease (IBD) is an acute, highly contagious, and immunosuppressive avian disease caused by IBD virus (IBDV). IBDV VP3 is a multifunctional protein playing a key role in virus assembly and pathogenesis. To investigate the role of VP3 in pathogenesis, we transfected DF-1 cells with pRK5-FLAG-vp3 and found that VP3 enhanced type I interferon expression and suppressed IBDV replication. Furthermore we found that VP3 interacted with chicken Ribosomal Protein L18 (chRPL18) in host cells and knockdown of chRPL18 by RNAi significantly promoted Type I interferon expression and inhibited IBDV replication...
December 19, 2017: Virus Research
https://www.readbyqxmd.com/read/29261447/serologic-surveillance-of-wild-and-pen-reared-ring-necked-pheasants-phasianus-colchicus-as-a-method-of-understanding-disease-reservoirs
#13
Ian A Dwight, Peter S Coates, Simone T Stoute, C Gabriel Senties-Cue, Radhika V Gharpure, Maurice E Pitesky
We investigated exposure to infectious diseases in wild ( n=33) and pen-reared ( n=12) Ring-necked Pheasants ( Phasianus colchicus) in the Central Valley of California during 2014 and 2015. Serologic tests were positive for antibodies against hemorrhagic enteritis (HE), infectious bursal disease (IBD), and Newcastle disease (ND) viruses in both wild and pen-reared pheasants.
December 20, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/29235573/constitutively-elevated-levels-of-socs1-suppress-innate-responses-in-df-1-immortalised-chicken-fibroblast-cells
#14
E S Giotis, C S Ross, R C Robey, A Nohturfft, S Goodbourn, M A Skinner
The spontaneously immortalised DF-1 cell line is rapidly replacing its progenitor primary chicken embryo fibroblasts (CEFs) for studies on avian viruses such as avian influenza but no comprehensive study has as yet been reported comparing their innate immunity phenotypes. We conducted microarray analyses of DF-1 and CEFs, under both normal and stimulated conditions using chicken interferon-α (chIFN-α) and the attenuated infectious bursal disease virus vaccine strain PBG98. We found that DF-1 have an attenuated innate response compared to CEFs...
December 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29230245/adaptation-and-molecular-characterization-of-two-malaysian-very-virulent-infectious-bursal-disease-virus-isolates-adapted-in-bgm-70-cell-line
#15
Nafi'u Lawal, Mohd Hair-Bejo, Siti Suri Arshad, Abdul Rahman Omar, Aini Ideris
Two Malaysian very virulent infectious bursal disease virus (vvIBDV) strains UPM0081 and UPM190 (also known as UPMB00/81 and UPM04/190, respectively) isolated from local IBD outbreaks were serially passaged 12 times (EP12) in specific pathogen free (SPF) chicken embryonated eggs (CEE) by chorioallantoic membrane (CAM) route. The EP12 isolate was further adapted and serially propagated in BGM-70 cell line up to 20 passages (P20). Characteristic cytopathic effects (CPEs) were subtly observed at P1 in both isolates 72 hours postinoculation (pi)...
2017: Advances in Virology
https://www.readbyqxmd.com/read/29217325/protocatechuic-acid-pca-induced-a-better-antiviral-effect-by-immune-enhancement-in-spf-chickens
#16
Yongxia Guo, Qiang Zhang, Zonghui Zuo, Jun Chu, Hongzhi Xiao, M Tariq Javed, Cheng He
Protocatechuic acid (PCA) is an antiviral agent against Avian Influenza virus (AIV) and Infectious Bursal Disease (IBD) virus but its antiviral mechanism is unknown. In this study, we evaluated the humoral and cellular responses to PCA in specific pathogen-free (SPF) chickens. One hundred forty 35-day-old SPF chickens were randomly divided into 7 groups. The birds were inoculated with the commercial, attenuated Newcastle Disease Virus (NDV) vaccine and then received orally with 10, 20 or 40 mg/kg body weight of PCA for 21 days...
December 4, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29211914/stinging-nettle-and-neem-enhance-antibody-response-to-local-killed-and-imported-live-infectious-bursal-disease-vaccines-in-indigenous-chicken-in-kenya
#17
M O Bwana, L W Njagi, P N Nyaga, P G Mbuthia, L C Bebora, M W Wahome, W U Mutinda, P M Kitala
Immune responses are critical for protection of chickens from infectious bursal disease (IBD). In this study, the antibody response-enhancing effect of drinking water supplementation of 1% stinging nettle and neem on different IBD vaccines and vaccination regimes was evaluated, using 36 (n = 36) specific antibody negative indigenous chicks. The birds were allocated into 3 groups as follows: 1A-C, 2A-C, and 3A-B, while group 3C acted as the unvaccinated non-supplemented control. A local inactivated K1 and imported live attenuated D78 IBD vaccines were given to groups 1A-C and 3A-B at 14 and 28 d of age, respectively...
December 2, 2017: Poultry Science
https://www.readbyqxmd.com/read/29184548/fused-igy-fc-and-polysaccharide-adjuvant-enhanced-the-immune-effect-of-the-recombinant-vp2-and-vp5-subunits-a-prospect-for-improvement-of-infectious-bursal-disease-virus-subunit-vaccine
#18
Huining Wang, Sufeng Shan, Shujuan Wang, Hao Zhang, Lili Ma, Liping Hu, He Huang, Kai Wei, Ruiliang Zhu
Infectious bursal disease virus (IBDV) is a highly contagious pathogen that causes damage in lymphoid organs and remains a threat to the poultry industry worldwide. Currently, subunit vaccines based on VP2 antigen expressed in prokaryotic systems are widely used in clinical settings. However, the immunogenicity of VP2 vaccines is limited because of their inherent defect that the structure of the antigen expressed in Escherichia coli (E. coli) may be different from its natural conformation. In this study, we fused VP2 and VP5 protective antigen genes and linked the chicken IgY Fc gene onto it...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29169149/prokaryotic-expression-and-anti-ibdv-activity-of-chicken-interleukin-18-and-interferon-%C3%AE
#19
Baifen Song, Xiaoting Li, Jinzhu Ma, Liquan Yu, Zhenyue Feng, Zhenhua Liu, Yudong Cui
Interferon-γ (IFN-γ), a cytokine produced by activated natural killer cells and T lymphocytes, is an important regulator of innate and adaptive immunity. Interleukin (IL)-18, also known as IFN-γ-inducing factor, is a cytokine that induces T and natural killer cells to produce IFN-γ. In this study, the chicken IL-18 (ChIL-18) and chicken IFN-γ (ChIFN-γ) genes were inserted into the pET28a prokaryotic expression vector, resulting in pET28a-IL-18 and pET28a-IFN-γ, respectively. These plasmids were transformed into Escherichia coli strain BL21, and the ChIL-18 and ChIFN-γ proteins were expressed and purified...
November 24, 2017: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/29154745/differential-gene-expression-in-chicken-primary-b-cells-infected-ex-vivo-with-attenuated-and-very-virulent-strains-of-infectious-bursal-disease-virus-ibdv
#20
Katherine L Dulwich, Efstathios S Giotis, Alice Gray, Venugopal Nair, Michael A Skinner, Andrew J Broadbent
Infectious bursal disease virus (IBDV) belongs to the family Birnaviridae and is economically important to the poultry industry worldwide. IBDV infects B cells in the bursa of Fabricius (BF), causing immunosuppression and morbidity in young chickens. In addition to strains that cause classical Gumboro disease, the so-called 'very virulent' (vv) strain, also in circulation, causes more severe disease and increased mortality. IBDV has traditionally been controlled through the use of live attenuated vaccines, with attenuation resulting from serial passage in non-lymphoid cells...
November 20, 2017: Journal of General Virology
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