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Infectious bronchitis virus

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https://www.readbyqxmd.com/read/28923510/first-characterization-of-a-middle-east-gi-23-lineage-var2-like-of-infectious-bronchitis-virus-in-europe
#1
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-5a-5b-N-UTR3')...
September 15, 2017: Virus Research
https://www.readbyqxmd.com/read/28899630/protection-against-infectious-bronchitis-virus-by-spike-ectodomain-subunit-vaccine
#2
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
#3
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...
September 12, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28880958/think-globally-act-locally-phylodynamic-reconstruction-of-infectious-bronchitis-virus-ibv-qx-genotype-gi-19-lineage-reveals-different-population-dynamics-and-spreading-patterns-when-evaluated-on-different-epidemiological-scales
#4
Giovanni Franzo, Paola Massi, Claudia Maria Tucciarone, Ilaria Barbieri, Giovanni Tosi, Laura Fiorentini, Massimo Ciccozzi, Antonio Lavazza, Mattia Cecchinato, Ana Moreno
Infectious bronchitis virus (IBV) represents one of the poultry industry major threats, particularly in high density producing countries. The emergence and spread of new IBV genotypes have frustrated the various disease control efforts implemented over time. Despite that, few comprehensive and large scale studies have been performed to understand the international and local spreading dynamics of this virus. In the present work, these phenomena were evaluated by implementing a Bayesian phylodynamic approach to reconstruct the epidemiological patterns and population history of the QX genotype (currently renamed GI-19 lineage), the most relevant IBV lineage of the Old-World...
2017: PloS One
https://www.readbyqxmd.com/read/28853253/-establishment-of-a-high-sensitive-indirect-elisa-for-detecting-specific-antibodies-against-h9-subtype-avian-influenza-virus
#5
Wei Zhang, Lidan Hou, Jie Song, Shuang Zhang, Yun Li, Jing Li, Lei Sun, Wenhui Fan, Wenjun Liu
H9 subtype avian influenza virus causes worldwide epidemic, resulting in enormous economic losses of poultry production. In the present study, an indirect ELISA method was established for more accurate and specific detection. The recombinant protein of the globular head domain of HA of H9 subtype avian influenza virus was used as antigen. Specific blocking buffers and dilution buffers were determined to increase the sensitivity and specificity. The sensitivity of ELISA was higher than that of hemagglutination inhibition (HI) test...
August 25, 2017: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/28826771/astragalus-polysaccharides-enhance-the-immune-response-to-avian-infectious-bronchitis-virus-vaccination-in-chickens
#6
Pengju Zhang, Jun Wang, Weixia Wang, Xiaohui Liu, Haiyan Liu, Xintao Li, Xinghong Wu
Astragalus polysaccharides (APS) are biological macromolecules extracted from Astragalus species that have strong immunoregulatory properties. In this study, APS were employed as an adjuvant for an avian infectious bronchitis virus (IBV) vaccine, and its effects on the cellular immune and humoral immune responses to vaccination in chicken were investigated. One hundred and fifty chicken were randomly divided into five groups (n = 30, each group). The chickens in all groups, except for the unvaccinated control group, were vaccinated with an IBV DNA vaccine...
August 18, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28805451/genetic-characterisation-and-analysis-of-infectious-bronchitis-virus-isolated-from-brazilian-flocks-between-2010-and-2015
#7
Claudia Carranza, Claudete S Astolfi-Ferreira, Silvana H Santander Parra, Luis F N Nuñez, Zoltan Penzes, Jorge L Chacón, Luiz Sesti, Ruy D Chacón, Antonio J Piantino Ferreira
Infectious bronchitis virus (IBV) variants in Brazil were isolated during 2010-2015 for epidemiological and molecular analysis to characterise the different variants and perform a bioinformatic analysis to compare with sequences of variants collected over the previous 40 years. Of the 453 samples examined, 61.4% were positive for IBV and 75.9% of these were considered to have the BR-I genotype and were detected in birds of all ages distributed in all five Brazilian regions. The ratio of non-synonymous substitutions per non-synonymous site (dN) to synonymous substitutions per synonymous site (dS), i...
August 14, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28800976/genome-characterization-antigenicity-and-pathogenicity-of-a-novel-infectious-bronchitis-virus-type-isolated-from-south-china
#8
Lei Jiang, Wenjun Zhao, Zongxi Han, Yuqiu Chen, Yan Zhao, Junfeng Sun, Huixin Li, Yuhao Shao, Liangliang Liu, Shengwang Liu
In 2014, three infectious bronchitis virus (IBV) strains, designated as γCoV/ck/China/I0111/14, γCoV/ck/China/I0114/14 and γCoV/ck/China/I0118/14, were isolated and identified from chickens suspected to be infected with IBV in Guangxi province, China. Based upon data arising from S1 sequence and phylogenetic analyses, the three IBV isolates were genetically different from other known IBV types, which represented a novel genotype (GI-29). Virus cross-neutralization tests, using γCoV/ck/China/I0111/14 as a representative, showed that genotype GI-29 was antigenically different from all other known IBV types, thus representing a novel serotype...
August 8, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28789874/genotyping-of-avian-infectious-bronchitis-viruses-in-iran-2015-2017-reveals-domination-of-is-1494-like-virus
#9
Amir Modiri Hamadan, Arash Ghalyanchilangeroudi, Masoud Hashemzadeh, Hossein Hosseini, Vahid Karimi, Ramak Yahyaraeyat, Hamideh Najafi
Avian infectious bronchitis virus (IBV) is causing major economic losses to the poultry industry. The analysis of the S1 gene has been used to determine IBV genotype. The aim of this study was genotyping of IBVs circulating among the Iranian broiler flocks in the period between 2015 to 2017. Trachea samples from 278 broiler flocks were collected from broiler farms in eight provinces of Iran. After Real-time RT-PCR, IBV-positive samples were further characterized based on S1 gene. The results of the Real-time RT-PCR showed that 52...
August 5, 2017: Virus Research
https://www.readbyqxmd.com/read/28779232/microrna-transcriptome-analysis-in-chicken-kidneys-in-response-to-differing-virulent-infectious-bronchitis-virus-infections
#10
Xin Yang, Wenqian Gao, Hui Liu, Jianan Li, Danyu Chen, Feng Yuan, Zhikun Zhang, Hongning Wang
Infectious bronchitis virus (IBV) can cause a highly contagious and acute respiratory disease in poultry. MicroRNAs (miRNAs) have emerged as a class of crucial regulators for gene expression and are involved in the regulation of virus defence and immunological processes. To understand miRNA regulation in chickens in response to IBV infection, high-throughput sequencing was performed to compare the small RNA libraries from the kidneys of chicken infected with SCK2, SCDY2 and LDT3-A. By comparing these data to healthy chickens, a total of 58 differentially expressed (DE) miRNAs were identified...
August 4, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28776490/global-distributions-and-strain-diversity-of-avian-infectious-bronchitis-virus-a-review
#11
Faruku Bande, Siti Suri Arshad, Abdul Rahman Omar, Mohd Hair-Bejo, Aliyu Mahmuda, Venugopal Nair
The poultry industry faces challenge amidst global food security crisis. Infectious bronchitis is one of the most important viral infections that cause huge economic loss to the poultry industry worldwide. The causative agent, infectious bronchitis virus (IBV) is an RNA virus with great ability for mutation and recombination; thus, capable of generating new virus strains that are difficult to control. There are many IBV strains found worldwide, including the Massachusetts, 4/91, D274, and QX-like strains that can be grouped under the classic or variant serotypes...
June 2017: Animal Health Research Reviews
https://www.readbyqxmd.com/read/28770245/molecular-characterization-and-phylogenetic-analyses-of-virulent-infectious-bronchitis-viruses-isolated-from-chickens-in-eastern-saudi-arabia
#12
Maged Gomaa Hemida, Mohammed A Al-Hammadi, Abdul Hafeed S Daleb, Cecilio R Gonsalves
Infectious bronchitis virus (IBV) is one of the major respiratory viral threats for chickens. Despite the intensive application of IBV vaccines, several outbreaks have been reported worldwide. Here, we report several IBV outbreaks in thirteen poultry farms in Eastern Saudi Arabia (ESA) from 2013 to 2014. The main goals of the current study were as follows: (1) isolation and molecular characterization of the currently circulating strains in ESA (Al-Hasa, Dammam, and Buqayq) and (2) evaluation of the immune status of these birds to IBV...
June 2017: Virusdisease
https://www.readbyqxmd.com/read/28763472/infectious-bronchitis%C3%A2-corona%C3%A2-virus%C3%A2-establishes-productive-infection-in-avian-macrophages-interfering-with-selected-antimicrobial-functions
#13
Aruna Amarasinghe, Mohamed Sarjoon Abdul-Cader, Sadiya Nazir, Upasama De Silva Senapathi, Frank van der Meer, Susan Catherine Cork, Susantha Gomis, Mohamed Faizal Abdul-Careem
Infectious bronchitis virus (IBV) causes respiratory disease leading to loss of egg and meat production in chickens. Although it is known that macrophage numbers are elevated in the respiratory tract of IBV infected chickens, the role played by macrophages in IBV infection, particularly as a target cell for viral replication, is unknown. In this study, first, we investigated the ability of IBV to establish productive replication in macrophages in lungs and trachea in vivo and in macrophage cell cultures in vitro using two pathogenic IBV strains...
2017: PloS One
https://www.readbyqxmd.com/read/28747730/epidemiology-and-characterization-of-avian-infectious-bronchitis-virus-strains-circulating-in-southern-china-during-the-period-from-2013-2015
#14
Keyu Feng, Feng Wang, Yu Xue, Qingfeng Zhou, Feng Chen, Yingzuo Bi, Qingmei Xie
Two hundred and six strains of avian infectious bronchitis virus (IBV) were isolated from chickens showing signs of disease in southern China during the period from 2013-2015. The nucleotide and amino acid sequences from the isolated field strains were compared to 42 published references. Nucleotide homologies ranged from 63.1-99.9% and amino acid homologies ranging from 60.2-100%. At least seven IBV genotypes were co-circulating in commercial chicken farms in southern China. The IBV isolates were genetically diverse and underwent continuing evolution...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28705717/whole-genome-characterization-of-uruguayan-strains-of-avian-infectious-bronchitis-virus-reveals-extensive-recombination-between-the-two-major-south-american-lineages
#15
Ana Marandino, Gonzalo Tomás, Yanina Panzera, Gonzalo Greif, Adriana Parodi-Talice, Martín Hernández, Claudia Techera, Diego Hernández, Ruben Pérez
Infectious bronchitis virus (Gammacoronavirus, Coronaviridae) is a genetically variable RNA virus that causes one of the most persistent respiratory diseases in poultry. The virus is classified in genotypes and lineages with different epidemiological relevance. Two lineages of the GI genotype (11 and 16) have been widely circulating for decades in South America. GI-11 is an exclusive South American lineage while the GI-16 lineage is distributed in Asia, Europe and South America. Here, we obtained the whole genome of two Uruguayan strains of the GI-11 and GI-16 lineages using Illumina high-throughput sequencing...
July 10, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28692924/experimental-co-infection-of-infectious-bronchitis-and-low-pathogenic-avian-influenza-h9n2-viruses-in-commercial-broiler-chickens
#16
Kareem E Hassan, Ahmed Ali, Salama A S Shany, Magdy F El-Kady
In this study, commercial broilers were experimentally infected with single (classical IBV, variant IBV or AIV-H9N2) or mixed AIV-H9N2 with classical, variant or vaccine strains of IBV. Birds were monitored for clinical and pathological outcomes and virus shedding for 10days post infection (DPI). Clinical signs were limited to the respiratory tract in all challenged groups and varied from mild to moderate mouth breathing to severe respiratory signs with snorting sound and extended head. Mortalities were only recorded in mixed AIV-H9N2/variant IBV challenge group...
June 30, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28689232/co-circulation-of-three-clusters-of-793-b-like-avian-infectious-bronchitis-virus-genotypes-in-iranian-chicken-flocks
#17
Ali Yousefzadeh Kalokhoran, Arash Ghalyanchilangeroudi, Hossein Hosseini, Omid Madadgar, Vahid Karimi, Masoud Hashemzadeh, Parvaneh Hesari, Mohammad Taha Zabihi Petroudi, Hamideh Najafi
Avian infectious bronchitis (IB) is an acute and highly contagious viral disease causing severe economic losses in the poultry industry. The 793/B IB virus is an important infectious bronchitis virus (IBV) genotype currently circulating in several countries, including Iran. One hundred confirmed IBV samples (between 2014 and 2015; from 15 provinces in Iran) were selected for genotyping based on S1 sequencing. After phylogenetic analysis, it was found that 30% of the IBV isolates belonged to the 793/B genotype...
July 8, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28686880/chicken-mannose-binding-lectin-has-antiviral-activity-towards-infectious-bronchitis-virus
#18
Weidong Zhang, Kim M Bouwman, Steven J van Beurden, Soledad R Ordonez, Martin van Eijk, Henk P Haagsman, M Hélène Verheije, Edwin J A Veldhuizen
Mannose binding lectin (MBL) is a collagenous C-type lectin, which plays an important role in innate immunity. It can bind to carbohydrates on the surface of a wide range of pathogens, including viruses. Here we studied the antiviral effect of recombinant chicken (rc)MBL against Infectious Bronchitis Virus (IBV), a highly contagious coronavirus of chicken. rcMBL inhibited in a dose-dependent manner the infection of BHK-21 cells by IBV-Beaudette, as detected by immunofluorescence staining of viral proteins and qPCR...
September 2017: Virology
https://www.readbyqxmd.com/read/28665723/kidney-cell-adapted-infectious-bronchitis-arkdpi-vaccine-is-stable-and-protective
#19
R A Zegpi, C Breedlove, V L van Santen, C R Rasmussen-Ivey, H Toro
We previously demonstrated that adaptation of an embryo-attenuated infectious bronchitis virus (IBV) Arkansas (Ark) Delmarva Poultry Industry (DPI)-derived vaccine to chicken embryo kidney (CEK) cells (CEKp7) shifted the virus population towards homogeneity in spike (S) and nonstructural protein genes. Moreover, the typical Ark vaccine subpopulations emerging in chickens vaccinated with commercial Ark vaccines were not detected in chickens vaccinated with CEKp7, indicating that kidney-cell adaptation drastically increased the stability of the vaccine virus population in chickens...
June 2017: Avian Diseases
https://www.readbyqxmd.com/read/28660781/variability-in-biological-behaviour-pathogenicity-protectotype-and-induction-of-virus-neutralizing-antibodies-by-different-vaccination-programs-to-infectious-bronchitis-virus-genotype-q1-strains-from-chile
#20
J J de Wit, R Dijkman, P Guerrero, J Calvo, A Gonzalez, H Hidalgo
In the period from July 2008 to 2010 a disease episode resulting in serious economic losses in the major production area of the Chilean poultry industry were reported. These losses were associated with respiratory problems, increase of condemnations, drops in egg production and nephritis in breeders, laying hens and broilers due to infections with infectious bronchitis virus (IBV). Twenty-five IBV isolates were genotyped and 4 strains were selected for further testing by pathotyping and protectotyping. Twenty-four IBV isolates were of the Q1 genotype...
June 29, 2017: Avian Pathology: Journal of the W.V.P.A
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