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Infectious bronchitis virus

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https://www.readbyqxmd.com/read/29141204/characterization-of-the-complete-genome-antigenicity-pathogenicity-tissue-tropism-and-shedding-of-a-recombinant-avian-infectious-bronchitis-virus-with-a-ck-ch-ljl-140901-like-backbone-and-an-s2-fragment-from-a-4-91-like-virus
#1
Lei Jiang, Zongxi Han, Yuqiu Chen, Wenjun Zhao, Junfeng Sun, Yan Zhao, Shengwang Liu
In this study, we isolated an infectious bronchitis virus, designated I1101/16, from broiler breeders in China. Analysis of the S1 gene showed that isolate I1101/16 was genetically close to strain ck/CH/LJL/140901, which belongs to the TW I genotype (also known as lineage GI-7 based on the recent IBV classification), however the S2 gene showed genetic diversity comparing to that of S1 gene. Comparison of the genomic sequences showed that the genome of isolate I1101/16 was similar to that of strain ck/CH/LJL/140901 from the 5' end of the genome to the 5' end of the S2 gene and from the 5' end of the 3a gene to the end of the genome, whereas the remaining parts of the genome sequences were more closely related to those of strain 4/91 than those of ck/CH/LJL/140901, thereby suggesting that recombination might have occurred during the origin of the virus...
November 12, 2017: Virus Research
https://www.readbyqxmd.com/read/29132350/avian-infectious-bronchitis-virus-disrupts-the-melanoma-differentiation-associated-gene-5-mda5-signaling-pathway-by-cleavage-of-the-adaptor-protein-mavs
#2
Liping Yu, Xiaorong Zhang, Tianqi Wu, Jin Su, Yuyang Wang, Yuexin Wang, Baoyang Ruan, Xiaosai Niu, Yantao Wu
BACKGROUND: Melanoma differentiation associated gene 5 (MDA5) and retinoic acid-inducible gene-I (RIG-I) selectively sense cytoplasmic viral RNA to induce an antiviral immune response. Infectious bronchitis virus (IBV) is one of the most important infectious agents in chickens, and in chicken cells, it can be recognized by MDA5 to activate interferon production. RIG-I is considered to be absent in chickens. However, the absence of RIG-I in chickens raises the question of whether this protein influences the antiviral immune response against IBV infection...
November 13, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29128885/evaluation-of-the-genetic-variability-found-in-brazilian-commercial-vaccines-for-infectious-bronchitis-virus
#3
Giuliana Loreto Saraiva, Marcus Rebouças Santos, Claiton Gonçalves Pereira, Pedro Marcus Pereira Vidigal, Juliana Lopes Rangel Fietto, Tiago Antonio de Oliveira Mendes, Gustavo Costa Bressan, Jamária A P Soares-Martins, Márcia Rogéria de Almeida, Abelardo Silva-Júnior
Infectious bronchitis virus (IBV) is currently one of the most important pathogens in the poultry industry. The H120 and Ma5 are the only viral strains approved by the Brazilian government as the constituent of vaccines. Despite the systematic vaccination in Brazil, IBV has not yet been controlled and diseases associated with this virus have been reported in vaccinated chickens. Here, we investigated the genetic variability of H120 and Ma5 strains present in the IBV vaccines from different Brazilian manufacturers...
November 11, 2017: Virus Genes
https://www.readbyqxmd.com/read/29122882/complete-genome-sequence-of-a-novel-strain-of-infectious-bronchitis-virus-isolated-from-chickens-in-china-in-2016
#4
Ting-Ting Li, Jin-Yan Li, Tao Huang, Xing-Yi Ge
An avian infectious bronchitis virus (IBV) was detected from trachea swabs of chickens in Hubei province, China, in 2016. The complete genome of the IBV strain, CK/CH/HB/2016, was characterized and analyzed to better understand IBV epidemiology in China.
November 9, 2017: Genome Announcements
https://www.readbyqxmd.com/read/29115156/development-and-evaluation-of-novel-recombinant-adenovirus-based-vaccine-candidates-for-infectious-bronchitis-virus-and-mycoplasma-gallisepticum-in-chickens
#5
Dongchao Zhang, Yuqing Long, Meng Li, Jianfang Gong, Xiaohui Li, Jing Lin, Jiali Meng, Keke Gao, Ruili Zhao, Tianming Jin
Avian infectious bronchitis (IB) caused by the infectious bronchitis virus (IBV) and mycoplasmosis caused by Mycoplasma gallisepticum (MG) are two major respiratory diseases in chickens that have resulted in severe economic losses in the poultry industry. We constructed a recombinant adenovirus that simultaneously expresses the S1 spike glycoprotein of IBV and the TM-1 protein of MG (pBH-S1-TM-1-EGFP). For comparison, we constructed two recombinant adenoviruses (pBH-S1-EGFP and pBH-TM-1-EGFP) that express either the S1 spike glycoprotein or the TM-1 protein alone...
November 8, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/29079779/reference-gene-selection-for-gene-expression-study-in-shell-gland-and-spleen-of-laying-hens-challenged-with-infectious-bronchitis-virus
#6
Samiullah Khan, Juliet Roberts, Shu-Biao Wu
Ten reference genes were investigated for normalisation of candidate target gene expression data in the shell gland and spleen of laying hens challenged with two strains of infectious bronchitis virus (IBV). Data were analysed with geNorm, NormFinder and BestKeeper, and a comprehensive ranking (geomean) was calculated. In the combined data set of IBV challenged shell gland samples, the comprehensive ranking showed TATA-box binding protein (TBP) and tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein zeta (YWHAZ) as the two most stable, and succinate dehydrogenase complex flavoprotein subunit A (SDHA) and albumin (ALB) as the two least stable reference genes...
October 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29077954/evaluation-of-793-b-like-and-mass-like-vaccine-strain-kinetics-in-experimental-and-field-conditions-by-real-time-rt-pcr-quantification
#7
C M Tucciarone, G Franzo, G Berto, M Drigo, G Ramon, K C Koutoulis, E Catelli, M Cecchinato
Infectious bronchitis virus (IBV) is a great economic burden both for productive losses and costs of the control strategies. Many different vaccination protocols are applied in the same region and even in consecutive cycles on the same farm in order to find the perfect balance between costs and benefits. In Northern Italy, the usual second vaccination is more and more often moved up to the chick's first d of life. The second strain administration together with the common Mass priming by spray at the hatchery allows saving money and time and reducing animal stress...
October 25, 2017: Poultry Science
https://www.readbyqxmd.com/read/29068273/cd59-association-with-infectious-bronchitis-virus-particles-protects-against-antibody-dependent-complement-mediated-lysis
#8
Yanquan Wei, Yanhong Ji, Huichen Guo, Xiaoying Zhi, Shichong Han, Yun Zhang, Yuan Gao, Yanyan Chang, Dan Yan, Kangyu Li, Ding Xiang Liu, Shiqi Sun
CD59 protein functions as a negative regulator of the terminal pathway of the complement system by binding to the C8/C9 factors. To date, little is known about the role of CD59 in coronavirus infectious bronchitis virus (IBV) infection. In this study, we discovered that CD59 was downregulated in IBV-infected cells and was associated with IBV virions. This association protected IBV particles from antibody-dependent complement-mediated lysis. IBV titres in the supernatant were significantly increased when CD59 proteins were overexpressed in cells followed by IBV infection, and this observation was further supported by knockdown or cleavage of CD59...
October 25, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/29054443/development-of-an-xtag-multiplex-pcr-array-for-the-detection-of-four-avian-respiratory-viruses
#9
Feng Cong, Yujun Zhu, Xiangnan Liu, Xiuzhen Li, Meili Chen, Ren Huang, Pengju Guo
Acute respiratory tract infections are of paramount importance in the poultry industry. We developed an xTAG bead assay for the simultaneous detection and discrimination of avian influenza virus (AIV), Newcastle disease virus (NDV), infectious bronchitis virus (IBV) and infectious laryngotracheitis virus (ILTV). The assay lacked nonspecific reactions with other common avian viruses and the limit of detection was 6.75 × 10(2)- 3.52 × 10(3)copies/μL. We examined 60 clinical specimens and found 18 positive for respiratory viruses...
October 17, 2017: Molecular and Cellular Probes
https://www.readbyqxmd.com/read/29035788/coronavirus-infectious-bronchitis-virus-non-structural-proteins-8-and-12-form-stable-complex-independent-of-the-non-translated-regions-of-viral-rna-and-other-viral-proteins
#10
Yong Wah Tan, To Sing Fung, Hongyuan Shen, Mei Huang, Ding Xiang Liu
The cleavage products from coronavirus polyproteins, known as the non-structural proteins (nsps), are believed to make up the major components of the viral replication/transcription complex. In this study, several nsps encoded by avian gammacoronavirus infectious bronchitis virus (IBV) were screened for RNA-binding activity and interaction with its RNA-dependent RNA polymerase, nsp12. Nsp2, nsp5, nsp8, nsp9 and nsp10 were found to bind to untranslated regions (UTRs), while nsp8 was confirmed to interact with nsp12...
October 13, 2017: Virology
https://www.readbyqxmd.com/read/29035787/identification-of-n-linked-glycosylation-sites-in-the-spike-protein-and-their-functional-impact-on-the-replication-and-infectivity-of-coronavirus-infectious-bronchitis-virus-in-cell-culture
#11
Jie Zheng, Yoshiyuki Yamada, To Sing Fung, Mei Huang, Raymond Chia, Ding Xiang Liu
Spike (S) glycoprotein on the viral envelope is the main determinant of infectivity. The S protein of coronavirus infectious bronchitis virus (IBV) contains 29 putative asparagine(N)-linked glycosylation sites. These post-translational modifications may assist in protein folding and play important roles in the functionality of S protein. In this study, we used bioinformatics tools to predict N-linked glycosylation sites and to analyze their distribution in IBV strains and variants. Among these sites, 8 sites were confirmed in the S protein extracted from partially purified virus particles by proteomics approaches...
October 13, 2017: Virology
https://www.readbyqxmd.com/read/28972403/detection-of-different-genotypes-of-infectious-bronchitis-virus-and-of-infectious-bursal-disease-virus-in-european-broilers-during-an-epidemiological-study-in-2013-and-the-consequences-for-the-diagnostic-approach
#12
J J de Wit, C Cazaban, R Dijkman, G Ramon, Y Gardin
To gather recent data regarding the infectious bronchitis (IB) and infectious bursal disease (IBD) situation in Europe, a large-scale field epidemiological survey using diagnostic samples has been implemented in 2013 for about six months in several European countries: France, Germany, Greece, Italy, the Netherlands, Poland, Portugal, the Republic of Ireland, Spain and the United Kingdom. In 234 flocks that were sampled, strains from 10 different IBV genotypes were detected: the 793B genotype was detected most frequently, followed by QX, Massachusetts (Mass) and the Xindadi-like strains...
October 3, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28957013/isolation-and-molecular-characterization-of-novel-infectious-bronchitis-virus-variants-from-vaccinated-broiler-flocks-in-egypt
#13
Mohammed A Abdel-Sabour, Emad M Al-Ebshahy, Samy A Khaliel, Nabil A Abdel-Wanis, Tokuma Yanai
The present study aimed to determine the molecular characteristics of circulating infectious bronchitis virus (IBV) strains in vaccinated broiler flocks in the Giza and Fayoum governorates. Thirty-four isolates were collected, and egg propagation revealed their ability to induce typical IBV lesions after three to five successive passages. Three selected isolates were identified as IBV using a real-time reverse transcriptase-PCR assay targeted the nucleocapsid (N) gene and further characterized by partial spike (S) gene sequence analysis...
September 2017: Avian Diseases
https://www.readbyqxmd.com/read/28957002/infectious-bronchitis-virus-s2-of-4-91-expressed-from-recombinant-virus-does-not-protect-against-ark-type-challenge
#14
Fatma Eldemery, Yufeng Li, Qingzhong Yu, Vicky L van Santen, Haroldo Toro
We previously demonstrated that chickens primed with a recombinant Newcastle disease virus LaSota (rLS) expressing the S2 gene of infectious bronchitis virus (IBV) and boosted with an attenuated IBV Massachusetts (Mass)-type vaccine were protected against IBV Arkansas (Ark)-type virulent challenge. A possible basis for the reported ability of IBV 4/91 (serotype 793/B) vaccine to protect against divergent IBV strains (e.g., QX, Q1, and D1466) in a prime-boost approach with an IBV Mass vaccine is that an immune response against the S2 protein of IBV 4/91 is cross-protective...
September 2017: Avian Diseases
https://www.readbyqxmd.com/read/28956996/understanding-immune-resistance-to-infectious-bronchitis-using-major-histocompatibility-complex-chicken-lines
#15
A P da Silva, R Hauck, H Zhou, R A Gallardo
Genetic resistance or susceptibility to infectious diseases has been largely associated with the avian major histocompatibility complex (MHC) genes. Our goal was to determine resistance and susceptibility of MHC B haplotype in congenic and inbred chicken lines in order to establish a resistant-susceptible model. Eight congenic lines (253/B18, 254/B15, 330/B21, 312/B24, 331/B2, 335/B19, 336/B21, and 342/BO), two inbred lines (003/B17 and 077/B19), and three commercial lines (white leghorn, brown layers, and broilers) were used in two experiments...
September 2017: Avian Diseases
https://www.readbyqxmd.com/read/28937583/infectious-bronchitis-virus-variants-molecular-analysis-and-pathogenicity-investigation
#16
REVIEW
Shu-Yi Lin, Hui-Wen Chen
Infectious bronchitis virus (IBV) variants constantly emerge and pose economic threats to poultry farms worldwide. Numerous studies on the molecular and pathogenic characterization of IBV variants have been performed between 2007 and 2017, which we have reviewed herein. We noted that viral genetic mutations and recombination events commonly gave rise to distinct IBV genotypes, serotypes and pathotypes. In addition to characterizing the S1 genes, full viral genomic sequencing, comprehensive antigenicity, and pathogenicity studies on emerging variants have advanced our understanding of IBV infections, which is valuable for developing countermeasures against IBV field outbreaks...
September 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28933760/infectious-bronchitis-virus-infection-induces-apoptosis-during-replication-in-chicken-macrophage-hd11-cells
#17
Xiaoxiao Han, Yiming Tian, Ru Guan, Wenqian Gao, Xin Yang, Long Zhou, Hongning Wang
Avian infectious bronchitis has caused huge economic losses in the poultry industry. Previous studies have reported that infectious bronchitis virus (IBV) infection can produce cytopathic effects (CPE) and apoptosis in some mammalian cells and primary cells. However, there is little research on IBV-induced immune cell apoptosis. In this study, chicken macrophage HD11 cells were established as a cellular model that is permissive to IBV infection. Then, IBV-induced apoptosis was observed through a cell viability assay, morphological changes, and flow cytometry...
July 26, 2017: Viruses
https://www.readbyqxmd.com/read/28923510/first-characterization-of-a-middle-east-gi-23-lineage-var2-like-of-infectious-bronchitis-virus-in-europe
#18
Anna Lisowska, Joanna Sajewicz-Krukowska, Alice Fusaro, Anna Pikula, Katarzyna Domanska-Blicharz
Variants assigned to GI-23 lineage of infectious bronchitis virus (IBV), formerly called Var2, have circulated for nearly 20 years only in countries of the Middle East. Strains of this lineage were first identified in Israel in 1998. More severe form of the virus appeared in 2006, when the second wave of Var2 epidemic has spread over the Middle East region. The present study describes the detection and detailed genetic characterization of the GI-23 viruses in Poland. The full-length genome of gammaCoV/Ck/Poland/G052/2016 strain consists of 27596 nucleotides and has typical organization for IBV (UTR5'-POl-S-3a-3b-E-M-4b-4c-5a-5b-N-UTR3')...
September 18, 2017: Virus Research
https://www.readbyqxmd.com/read/28899630/protection-against-infectious-bronchitis-virus-by-spike-ectodomain-subunit-vaccine
#19
Fatma Eldemery, Kellye S Joiner, Haroldo Toro, Vicky L van Santen
The avian coronavirus infectious bronchitis virus (IBV) S1 subunit of the spike (S) glycoprotein mediates viral attachment to host cells and the S2 subunit is responsible for membrane fusion. Using IBV Arkansas-type (Ark) S protein histochemistry, we show that extension of S1 with the S2 ectodomain improves binding to chicken tissues. Although the S1 subunit is the major inducer of neutralizing antibodies, vaccination with S1 protein has been shown to confer inadequate protection against challenge. The demonstrated contribution of S2 ectodomain to binding to chicken tissues suggests that vaccination with the ectodomain might improve protection compared to vaccination with S1 alone...
September 9, 2017: Vaccine
https://www.readbyqxmd.com/read/28895517/assessment-of-molecular-and-genetic-evolution-antigenicity-and-virulence-properties-during-the-persistence-of-the-infectious-bronchitis-virus-in-broiler-breeders
#20
Filipe Santos Fernando, Thaiane Coelho Kasmanas, Priscila Diniz Lopes, Maria de Fátima da Silva Montassier, Marcos Antônio Zanella Mores, Viviane Casagrande Mariguela, Caren Pavani, Romeu Moreira Dos Santos, Mário Sérgio Assayag, Helio José Montassier
The infectious bronchitis virus (IBV) causes a highly contagious disease [infectious bronchitis (IB)] that results in substantial economic losses to the poultry industry worldwide. We conducted a molecular and phylogenetic analysis of the S1 gene of Brazilian (BR) IBV isolates from a routinely vaccinated commercial flock of broiler breeders, obtained from clinical IB episodes that occurred in 24-, 46- and 62-week-old chickens. We also characterized the antigenicity, pathogenesis, tissue tropism and spreading of three IBV isolates by experimental infection of specific pathogen-free (SPF) chickens and contact sentinel birds...
October 2017: Journal of General Virology
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