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Infectious bronchitis virus

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https://www.readbyqxmd.com/read/27917677/infectious-bronchitis-vaccine-virus-detection-and-part-s1-genetic-variation-following-single-or-dual-inoculation-in-broiler-chicks
#1
Christopher Ball, Faez Awad, Sally Hutton, Anne Forrester, Matthew Baylis, Kannan Ganapathy
An investigation was undertaken of the extent of genetic variation occurring within infectious bronchitis virus (IBV) vaccine strains following vaccination of day-old broiler chicks. Chicks were divided into seven groups, with two groups receiving single Massachusetts (Mass) vaccinations and the other four were inoculated with combinations of different IBV serotypes; Mass, 793B, D274, and Arkansas (Ark). The remaining group was maintained as an unvaccinated control. Following vaccination, swabs and tissues collected at intervals were pooled and RNA was extracted for detection of IBV by reverse transcription polymerase chain reaction (RT PCR)...
December 5, 2016: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/27902312/genetic-mutations-in-live-infectious-bronchitis-vaccine-viruses-following-single-or-dual-in-vitro-infection-of-tracheal-organ-cultures
#2
Christopher Ball, Sarah Bennett, Anne Forrester, Kannan Ganapathy
Despite regular co-vaccination of two different strains of live infectious bronchitis vaccine viruses, little is known about possible mutations in these viruses following vaccination. As an alternative to chicks, this study used an in-vitro infection model to identify single nucleotide polymorphisms (SNPs) within the part-S1 gene of two live IBV vaccine strains (793B and Massachusetts) following single or dual inoculation onto tracheal organ cultures (TOCs). Results indicate that viral titres reduced over the duration of the study, conversely the amount of detected IBV genome increased...
October 12, 2016: Journal of General Virology
https://www.readbyqxmd.com/read/27876864/identification-of-an-infectious-bronchitis-coronavirus-strain-exhibiting-a-classical-genotype-but-altered-antigenicity-pathogenicity-and-innate-immunity-profile
#3
Shu-Yi Lin, Yao-Tsun Li, You-Ting Chen, Ting-Chih Chen, Che-Ming J Hu, Hui-Wen Chen
Avian coronavirus infectious bronchitis virus (IBV) poses economic threat to the poultry industry worldwide. Pathogenic IBV 3575/08 was isolated from broilers vaccinated with the attenuated viral vaccine derived from a Taiwan strain 2575/98. In this study, extensive investigations were conducted on the genome sequences, antigenicity, pathogenicity, and host immune responses of several IBV strains in specific-pathogen-free chickens. Sequence analyses revealed that 3575/08 and 2575/98 shared high homology in their structural genes, but not in non-structural accessory proteins such as 3a, 3b and 5b...
November 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27836775/insights-from-molecular-structure-predictions-of-the-infectious-bronchitis-virus-s1-spike-glycoprotein
#4
Christina Lora M Leyson, Brian J Jordan, Mark W Jackwood
Infectious bronchitis virus is an important respiratory pathogen in chickens. The IBV S1 spike is a viral structural protein that is responsible for attachment to host receptors and is a major target for neutralizing antibodies. To date, there is no experimentally determined structure for the IBV S1 spike. In this study, we sought to find a predicted tertiary structure for IBV S1 using I-TASSER, which is an automated homology modeling platform. We found that the predicted structures obtained were robust and consistent with experimental data...
December 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/27803698/pathogenicity-of-a-tw-like-strain-of-infectious-bronchitis-virus-and-evaluation-of-the-protection-induced-against-it-by-a-qx-like-strain
#5
Shi-Hong Yan, Yang Chen, Jing Zhao, Gang Xu, Ye Zhao, Guo-Zhong Zhang
Avian infectious bronchitis, a highly contagious disease caused by avian infectious bronchitis virus (IBV), is of considerable economic importance to the poultry industry. New IBV TW-like strains have increasingly emerged in China in recent years; hence, evaluating their pathogenicity and developing a specific vaccine to guard against their potential threat to the poultry industry is important. Here, we examined the pathogenicity of a TW-like IBV strain (GD), and evaluated the protective efficacy of the QX-like strain (JS) against GD in challenge infections in chickens...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27796116/health-evaluation-of-african-penguins-i-spheniscus-demersus-i-in-southern-africa
#6
Nola J Parsons, Tertius A Gous, Adam M Schaefer, Ralph E T Vanstreels
The African penguin (Spheniscus demersus) is an endangered seabird that breeds along the coast of Namibia and South Africa, and disease surveillance was identified as a priority for its conservation. Aiming for the establishment of baseline data on the presence of potential pathogens in this species, a comprehensive health assessment (blood smear examination, haematology, biochemistry and serology) was conducted on samples obtained from 578 African penguins at 11 breeding colonies and a rehabilitation centre...
September 20, 2016: Onderstepoort Journal of Veterinary Research
https://www.readbyqxmd.com/read/27793730/full-genome-sequence-analysis-of-a-newly-emerged-qx-like-infectious-bronchitis-virus-from-sudan-reveals-distinct-spots-of-recombination
#7
Mahmoud M Naguib, Dirk Höper, Abdel-Satar Arafa, Ahmed M Setta, Mohamed Abed, Isabella Monne, Martin Beer, Timm C Harder
Infectious bronchitis virus (IBV) infection continues to cause economically important diseases in poultry while different geno- and serotypes continue to circulate globally. Two infectious bronchitis viruses (IBV) were isolated from chickens with respiratory disease in Sudan. Sequence analysis of the hypervariable regions of the S1 gene revealed a close relation to the QX-like genotype which has not been detected in Sudan before. Whole genome analysis of IBV/Ck/Sudan/AR251-15/2014 isolate by next generation sequencing revealed a genome size of 27,646 nucleotides harbouring 13 open reading frames: 5'-1a-1b-S-3a-3b-E-M-4b-4c-5a-5b-N-6b-3'...
December 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/27738120/gamma-and-deltacoronaviruses-in-quail-and-pheasants-from-northern-italy
#8
C A Torres, V Listorti, C Lupini, G Franzo, M Drigo, E Catelli, P E Brandão, M Cecchinato
In view of the restricted knowledge on the diversity of coronaviruses in poultry other than chicken, this study aimed to investigate the genetic diversity of coronaviruses in quail, pheasant, and partridge from two regions of Northern Italy. To this end, pools of tracheal and cloacal swabs from European quail (Coturnix Coturnix) and intestinal tract from pheasants (Phasianus Colchicus) and partridge (Perdix Perdix) flocks, with or without enteric signs, were collected during 2015. Avian coronavirus (Gammacoronavirus) was detected in quail not vaccinated against Infectious Bronchitis Virus (IBV) and in pheasants vaccinated with an IBV Massachusetts serotype...
October 12, 2016: Poultry Science
https://www.readbyqxmd.com/read/27738043/complete-genome-sequence-of-a-brazil-type-avian-coronavirus-detected-in-a-chicken
#9
Paulo E Brandão, Giselle R R Ayres, Carolina A Torres, Laura Y B Villarreal, Aline S Hora, Sueli A Taniwaki
Avian coronavirus is the causative agent of infectious bronchitis in chickens, leading to multisystemic disease that might be controlled if adequate vaccine strains are used. This paper reports the first complete genome sequence of a Brazil type of this virus (27,615 nucleotides [nt]) isolated from the kidneys of a chicken.
October 13, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27705104/a-serosurvey-of-greater-sage-grouse-centrocercus-urophasianus-in-nevada
#10
Nancy L Sinai, Peter S Coates, Katelyn M Andrle, Chad Jefferis, C Gabriel Sentíes-Cué, Maurice E Pitesky
To better understand the potential avian diseases in Greater Sage-grouse ( Centrocercus urophasianus ) in the Great Basin in Nevada, we collected 31 blood samples March-April 2014 and tested for antibodies to eight viruses and two bacteria. Specifically, sera were tested for antibodies to avian leukosis virus type A, B, and J (ALV-A, ALV-B, and ALV-J, respectively), infectious bursal disease virus, infectious bronchitis virus, reticuloendothelial virus, avian influenza virus (AIV), West Nile virus, Pasteurella multocida (PM), and Salmonella enterica serovar Pullorum...
October 5, 2016: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/27670071/effect-of-different-vaccination-strategies-on-ibv-qx-population-dynamics-and-clinical-outbreaks
#11
Giovanni Franzo, Claudia Maria Tucciarone, Angela Blanco, Miquel Nofrarías, Mar Biarnés, Marti Cortey, Natàlia Majó, Elena Catelli, Mattia Cecchinato
The extreme variability and rapid evolution of Infectious bronchitis virus (IBV) has always represented the key challenge for its control because of the limited cross-protection among different strains. Several experimental trials have proven a broadening of the protection spectrum when animals are vaccinated with multiple genotypes. Nevertheless, the conditions of vaccine administration in field are so different that the generalization of experimental results is, at least, questionable. In the present study a large scale epidemiological-phylodynamic approach was used to reconstruct the demographic history of the major field genotype (i...
September 23, 2016: Vaccine
https://www.readbyqxmd.com/read/27667997/prediction-and-in-silico-identification-of-novel-b-cells-and-t-cells-epitopes-in-the-s1-spike-glycoprotein-of-m41-and-cr88-793-b-infectious-bronchitis-virus-serotypes-for-application-in-peptide-vaccines
#12
Faruku Bande, Siti Suri Arshad, Mohd Hair Bejo, Saeid Kadkhodaei, Abdul Rahman Omar
Bioinformatic analysis was used to predict antigenic B-cell and T-cell epitopes within the S1 glycoprotein of M41 and CR88 IBV strains. A conserved linear B-cell epitope peptide, YTSNETTDVTS(175-185), was identified in M41 IBV strains while three such epitopes types namely, VSNASPNSGGVD(279-290), HPKCNFRPENI(328-338), and NETNNAGSVSDCTAGT(54-69), were predicted in CR88 IBV strains. Analysis of MHCI binding peptides in M41 IBV strains revealed the presence of 15 antigenic peptides out of which 12 were highly conserved in 96-100% of the total M41 strains analysed...
2016: Advances in Bioinformatics
https://www.readbyqxmd.com/read/27665355/infectious-bronchitis-virus-poly-epitope-based-vaccine-protects-chickens-from-acute-infection
#13
Lei Tan, Yuqiang Zhang, Fang Liu, Yanmei Yuan, Yuan Zhan, Yingjie Sun, Xusheng Qiu, Chunchun Meng, Cuiping Song, Chan Ding
Infectious bronchitis virus (IBV) causes major losses in the poultry industry. The safe and effective vaccine to control IBV spread is imperative. In the present study, we developed IBV S1 glycoprotein poly-epitope-based DNA vaccine pV-S1B+S1T consisting of SH1208 and Holte strain BF2-restricted T cell epitopes and Australian T strain dominant B cell neutralization epitopes. Specific pathogen-free chickens were vaccinated with pV-S1B+S1T and control plasmids twice to elicit strong humoral and cellular immune response, as indicated by viral neutralization titers and results of CD8(+) T cell proliferation assays...
October 17, 2016: Vaccine
https://www.readbyqxmd.com/read/27624876/selection-of-reference-genes-for-gene-expression-analysis-by-real-time-qpcr-in-avian-cells-infected-with-infectious-bronchitis-virus
#14
Ambalika Batra, Helena J Maier, Mark S Fife
Infectious bronchitis virus (IBV) causes infectious bronchitis in poultry, a respiratory disease that is a source of major economic loss to the poultry industry. Detection and the study of the molecular pathogenesis of the virus often involves the use of real-time quantitative PCR assays (qPCR). To account for error within the experiments, the levels of target gene transcription are normalised to that of suitable reference genes. Despite publication of the MIQE guidelines in 2009, single un-tested reference genes are often used for normalization of qPCR assays in avian research studies...
September 13, 2016: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/27624642/a-survey-for-selected-avian-viral-pathogens-in-backyard-chicken-farms-in-finland
#15
L Pohjola, N Tammiranta, C Ek-Kommonen, T Soveri, M L Hänninen, M Fredriksson-Ahomaa, A Huovilainen
Backyard poultry is regaining popularity in Europe and increased interest in the health and management of non-commercial farms has resulted. Furthermore, commercial poultry farm owners have become concerned about the risk represented by contagious animal diseases that nearby backyard poultry could transmit. Fifty-one voluntary backyard chicken farms were visited between October 2012 and January 2013. Blood samples and individual cloacal swabs were collected from 457 chickens. In 44 farms (86%), one or more of the tested chickens had antibodies against avian encephalomyelitis and chicken infectious anemia viruses, 24 farms (47%) had chickens seropositive for infectious bronchitis virus, 10 farms (20%) had chickens seropositive for infectious bursal disease virus, six farms (12%) had chickens seropositive for infectious laryngotracheitis virus and two farms (5...
September 13, 2016: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/27619927/polymorphisms-in-the-s1-spike-glycoprotein-of-arkansas-type-infectious-bronchitis-virus-ibv-show-differential-binding-to-host-tissues-and-altered-antigenicity
#16
Christina Leyson, Monique França, Mark Jackwood, Brian Jordan
Sequencing avian infectious bronchitis virus spike genes re-isolated from vaccinated chicks revealed that many sequence changes are found on the S1 spike gene. In the ArkDPI strain, Y43H and ∆344 are the two most common changes observed. This study aims to examine the roles of Y43H and ∆344 in selection in vivo. Using recombinant ArkDPI S1 proteins, we conducted binding assays on chicken tracheas and embryonic chorioallantoic membrane (CAM). Protein histochemistry showed that the Y43H change allows for enhanced binding to trachea, whereas the ArkDPI S1 spike with H43 alone was able to bind CAM...
November 2016: Virology
https://www.readbyqxmd.com/read/27610726/gammacoronavirus-and-deltacoronavirus-in-quail
#17
C A Torres, A S Hora, P O Tonietti, S A Taniwaki, M Cecchinato, L Y B Villarreal, P E Brandão
This paper expands on a previous report about coronaviruses in quail. After surveillance carried out in 2009 and 2010, some farmers started vaccinating quail with the Massachusetts avian infectious bronchitis virus serotype. The samples for this study were collected in 2013 from São Paulo state in southeastern Brazil. Pools of trachea, lungs, reproductive tract, kidneys, and enteric contents from quail and laying hens kept in the same farms and from quail-only farms as well as from both healthy birds and those showing infectious bronchitis-like symptoms were sampled in this study...
September 2016: Avian Diseases
https://www.readbyqxmd.com/read/27610718/phylogeny-and-s1-gene-variation-of-infectious-bronchitis-virus-detected-in-broilers-and-layers-in-turkey
#18
Huseyin Yilmaz, Eda Altan, Utku Y Cizmecigil, Aydin Gurel, Gulay Yuzbasioglu Ozturk, Ozge Erdogan Bamac, Ozge Aydin, Paul Britton, Isabella Monne, Burhan Cetinkaya, Kenton L Morgan, Bonto Faburay, Juergen A Richt, Nuri Turan
The avian coronavirus infectious bronchitis virus (AvCoV-IBV) is recognized as an important global pathogen because new variants are a continuous threat to the poultry industry worldwide. This study investigates the genetic origin and diversity of AvCoV-IBV by analysis of the S1 sequence derived from 49 broiler flocks and 14 layer flocks in different regions of Turkey. AvCoV-IBV RNA was detected in 41 (83.6%) broiler flocks and nine (64.2%) of the layer flocks by TaqMan real-time RT-PCR. In addition, AvCoV-IBV RNA was detected in the tracheas 27/30 (90%), lungs 31/49 (62...
September 2016: Avian Diseases
https://www.readbyqxmd.com/read/27604121/the-sequence-of-the-full-spike-s1-glycoprotein-of-infectious-bronchitis-virus-circulating-in-egypt-reveals-evidence-of-intra-genotypic-recombination
#19
Ali Zanaty, Mahmoud M Naguib, Mohamed H El-Husseiny, Wesam Mady, Naglaa Hagag, Abdel-Satar Arafa
Infectious bronchitis virus (IBV) continues to circulate worldwide, with a significant impact on the poultry industry and affecting both vaccinated and unvaccinated flocks. Several studies have focused on the hypervariable regions (HVRs) of the spike gene (S1); however, genetic and bioinformatics studies of the whole S1 gene are limited. In this study, the whole S1 gene of five Egyptian IBVs was genetically analyzed. Phylogenetic analysis revealed that the Egyptian IBVs are clustered within two distinct groups: the classic group resembling the GI-1 genotype (vaccine strains) and the variant group (field strains) of the GI-23 genotype...
December 2016: Archives of Virology
https://www.readbyqxmd.com/read/27599936/pathogenicity-of-virulent-infectious-bronchitis-virus-isolate-yn-on-hen-ovary-and-oviduct
#20
Qi Zhong, Yan-Xin Hu, Ji-Hui Jin, Ye Zhao, Jing Zhao, Guo-Zhong Zhang
Avian infectious bronchitis is an economically important poultry disease caused by avian infectious bronchitis virus (IBV). IBV isolate YN is a virulent strain, which is genetically similar to most of the prevalent strains in China. In this study, 21-day-old commercial laying hens were infected with IBV strain YN. The damaging effects of the virus on the reproductive organs were evaluated with clinical observations, gross autopsy and histopathological examinations during the 100-day monitoring period post infection...
September 25, 2016: Veterinary Microbiology
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