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Infectious bronchitis virus

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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
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
https://www.readbyqxmd.com/read/28646651/use-of-sequence-independent-single-primer-amplification-sispa-for-rapid-detection-identification-and-characterization-of-avian-rna-viruses
#7
Klaudia Chrzastek, Dong-Hun Lee, Diane Smith, Poonam Sharma, David L Suarez, Mary Pantin-Jackwood, Darrell R Kapczynski
Current technologies with next generation sequencing have revolutionized metagenomics analysis of clinical samples. To achieve the non-selective amplification and recovery of low abundance genetic sequences, a simplified Sequence-Independent, Single-Primer Amplification (SISPA) technique in combination with MiSeq platform was applied to target negative- and positive-sense single-stranded RNA viral sequences. This method allowed successful sequence assembly of full or near full length avian influenza virus (AIV), infectious bronchitis virus (IBV), and Newcastle disease virus (NDV) viral genome...
September 2017: Virology
https://www.readbyqxmd.com/read/28633386/oral-administration-of-tea-saponins-to-relive-oxidative-stress-and-immune-suppression-in-chickens
#8
X Chi, S Bi, W Xu, Y Zhang, S Liang, S Hu
The present study was designed to evaluate the effects of tea saponins on oxidative stress induced by cyclophosphamide in chickens. One hundred twenty chickens were randomly divided into 5 groups. Groups 3 to 4 received intramuscular injection of cyclophosphamide to induce oxidative stress and immunosuppression. After that, groups 2 and 4 were orally administered tea saponins in drinking water for 7 d. Then, groups 1 to 4 were immunized with a live, bivalent vaccine of Newcastle disease virus and infectious bronchitis virus...
June 15, 2017: Poultry Science
https://www.readbyqxmd.com/read/28619140/decreased-egg-production-in-laying-hens-associated-with-infection-with-genotype-3-avian-hepatitis-e-virus-strain-from-china
#9
Qin Zhao, Baoyuan Liu, Yani Sun, Taofeng Du, Yiyang Chen, Xinjie Wang, Huixia Li, Yuchen Nan, Gaiping Zhang, En-Min Zhou
To determine the relationship between decreased egg production and avian HEV infection, thirty healthy 23-week-old Hy-Line Variety Brown layer hens were randomly divided into 3 groups with 10 hens per group. Next, a genotype 3 avian HEV strain from China was used to inoculate laying hens via oronasal or intravenous routes using a 50% chicken infectious dose of 500. All hens were necropsied at 14 weeks postinoculation (wpi). Fecal virus shedding, viremia, seroconversion, serum alanine aminotransferase (ALT) increases and liver lesions showed that after intravenous (i...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28619139/analysis-of-antigenicity-and-pathogenicity-reveals-major-differences-among-qx-like-infectious-bronchitis-viruses-and-other-serotypes
#10
Shihong Yan, Xiaoyu Liu, Jing Zhao, Gang Xu, Ye Zhao, Guozhong Zhang
Avian coronavirus infectious bronchitis virus (IBV) causes considerable damage to the poultry industry worldwide and the proportion of QX-like genotype isolates have increased over time. Here, to better understand the antigenicity and pathogenicity of this genotype, we conducted sequence analyses, cross neutralization tests, and also examined the pathogenicity of two strains, SD and SZ. Sequence analyses revealed that SD and SZ isolates belong to the QX-like IBV genotype and share high homology in their full-length genomes...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28619134/genetic-antigenic-and-pathogenic-characteristics-of-avian-infectious-bronchitis-viruses-genotypically-related-to-793-b-in-china
#11
Zongxi Han, Wenjun Zhao, Yuqiu Chen, Qianqian Xu, Junfeng Sun, Tingting Zhang, Yan Zhao, Shuling Liang, Mengying Gao, Qiuling Wang, Xiangang Kong, Shengwang Liu
In this study, 20 infectious bronchitis virus (IBV) strains, which were genotypically related to 793/B, as assessed by an S1 gene comparison and a complete genomic sequence analysis, were isolated and identified from 2009 to 2014 in China. Phylogenetic analysis, network tree, similarity plot analysis, Recombination Detection Program 4(RDP4) and sequence comparison revealed that 12 of the 20 isolates were likely the reisolated vaccine virus. One isolate, ck/CH/LSD/110857, was shown to have originated from recombination events between H120- and 4/91-like vaccine strains that did not result in changes of antigenicity and pathogenicity...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28619132/co-infection-of-h9n2-subtype-avian-influenza-virus-and-infectious-bronchitis-virus-decreases-sp-a-expression-level-in-chickens
#12
Qi Huang, Kai Wang, Ling Pan, Kezong Qi, Hongmei Liu, Hongjun Chen
Chicken surfactant protein A (cSP-A) is a collectin believed to play an important role in antiviral immunity. However, cSP-A expression in the respiratory tract of chickens after viral co-infection remains unclear. The aim of this study was the detection and characterization of cSP-A in co-infected chickens. For this purpose, four-week-old specific pathogen-free (SPF) chickens were divided into five groups and inoculated intranasally with H9N2 subtype avian influenza virus (AIV), infectious bronchitis virus (IBV), or Newcastle disease virus (NDV)...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28606144/a-reverse-genetics-system-for-avian-coronavirus-infectious-bronchitis-virus-based-on-targeted-rna-recombination
#13
Steven J van Beurden, Alinda J Berends, Annika Krämer-Kühl, Dieuwertje Spekreijse, Gilles Chénard, Hans-Christian Philipp, Egbert Mundt, Peter J M Rottier, M Hélène Verheije
BACKGROUND: Avian coronavirus infectious bronchitis virus (IBV) is a respiratory pathogen of chickens that causes severe economic losses in the poultry industry worldwide. Major advances in the study of the molecular biology of IBV have resulted from the development of reverse genetics systems for the highly attenuated, cell culture-adapted, IBV strain Beaudette. However, most IBV strains, amongst them virulent field isolates, can only be propagated in embryonated chicken eggs, and not in continuous cell lines...
June 12, 2017: Virology Journal
https://www.readbyqxmd.com/read/28603519/antigen-sparing-and-enhanced-efficacy-of-multivalent-vaccines-adjuvanted-with-immunopotentiators-in-chickens
#14
Peipei Wu, Jihu Lu, Lei Feng, Hongzhuan Wu, Xuehua Zhang, Mei Mei, Jibo Hou, Xiufan Liu, Yinghua Tang
We previously described that immunopotentiators, CVCVA5, increased the efficacy of H5 and H9 subtype avian influenza vaccines in chickens, ducks, and geese. In this study, we further investigated the effects of the CVCVA5 for improving the efficacy of other univalent or multivalent inactivated vaccines. The immune response administrated with half-dose of monovalent vaccine plus CVCVA5 were higher than those of one dose of monovalent vaccine without immunopotentiators as measured by levels of antibodies from serum, tears and bronchoalveolar lavage fluids, and cytokines of IFNγ and IL-4 from serum...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28523921/combination-of-h120-and-1-96-avian-infectious-bronchitis-virus-vaccine-strains-protect-chickens-against-challenge-with-is-1494-06-variant-2-like-infectious-bronchitis-virus
#15
M Habibi, V Karimi, A G Langeroudi, S A Ghafouri, M Hashemzadeh, R K Farahani, H Maghsoudloo, H Abdollahi, P Seifouri
Avian infectious bronchitis (IB) is a worldwide chicken disease, caused by avian infectious bronchitis virus (IBV) which infects all commercial poultry lines. The present study was done to evaluate protection caused by two different serotype vaccines (Massachusetts and 793/B) in order to evaluate protection against challenge with IS/1494/06-like virus (variant 2-like virus), which is prevalent in the Middle East. SPF chickens were divided into four groups (n = 20). First and second group as negative control group and non-vaccinated-challenged group received no vaccine...
2017: Acta Virologica
https://www.readbyqxmd.com/read/28508215/reverse-genetics-system-for-the-avian-coronavirus-infectious-bronchitis-virus
#16
Erica Bickerton, Sarah M Keep, Paul Britton
We have developed a reverse genetics system for the avian coronavirus infectious bronchitis virus (IBV) in which a full-length cDNA corresponding to the IBV genome is inserted into the vaccinia virus genome under the control of a T7 promoter sequence. Vaccinia virus as a vector for the full-length IBV cDNA has the advantage that modifications can be introduced into the IBV cDNA using homologous recombination, a method frequently used to insert and delete sequences from the vaccinia virus genome. Here, we describe the use of transient dominant selection as a method for introducing modifications into the IBV cDNA that has been successfully used for the substitution of specific nucleotides, deletion of genomic regions, and exchange of complete genes...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28495648/complete-genome-sequences-of-two-avian-infectious-bronchitis-viruses-isolated-in-egypt-evidence-for-genetic-drift-and-genetic-recombination-in-the-circulating-viruses
#17
Hassanein H Abozeid, Anandan Paldurai, Sunil K Khattar, Manal A Afifi, Magdy F El-Kady, Ayman H El-Deeb, Siba K Samal
Avian infectious bronchitis virus (IBV) is highly prevalent in chicken populations and is responsible for severe economic losses to poultry industry worldwide. In this study, we report the complete genome sequences of two IBV field strains, CU/1/2014 and CU/4/2014, isolated from vaccinated chickens in Egypt in 2014. The genome lengths of the strains CU/1/2014 and CU/4/2014 were 27,615 and 27,637 nucleotides, respectively. Both strains have a common genome organization in the order of 5'-UTR-1a-1b-S-3a-3b-E-M-4b-4c-5a-5b-N-6b-UTR-poly(A) tail-3'...
May 8, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28493279/specific-detection-of-gii-1-lineage-of-infectious-bronchitis-virus
#18
K Domanska-Blicharz, A Lisowska, A Pikuła, J Sajewicz-Krukowska
Infectious bronchitis virus (IBV) is a worldwide prevalent RNA virus that causes highly contagious and economically devastating disease in chicken. The virus exists in many different genetic forms which made the disease control very difficult. The present study describes the development and validation of TaqMan probe-based real-time reverse transcription-polymerase chain reaction (real-time RT-PCR) targeting the S1 coding region of S gene characteristic for the GII-1 lineage (formerly the D1466-like variant) of IBV...
May 10, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/28473895/pathogenicity-study-of-iranian-genotype-of-avian-infectious-bronchitis-virus-ir-1
#19
Hamideh Najafi, Arash Ghalyanchi Langeroudi, Masoud Hashemzadeh, Vahid Karimi, Omid Madadgar, Reza Khaltabadi Farahani, Seyed Ali Ghafouri, Hossein Maghsoudloo, Parvaneh Seifouri, Ali Madhi
Avian infectious bronchitis (IB) is a major cause of economic losses in poultry industry. The IB virus primarily affects respiratory tract, but various strains differ in their tropism for other target organs such as kidney and alimentary tract. The objective of this study was to estimate the pathogenicity of Iranian IBV variant (IR-1), which is limited exclusively to Iran. Specific pathogen free chicks were inoculated intranasally. Sera, fecal swabs and different tissue samples were collected on different days post infection (DPI)...
2017: Veterinary Research Forum
https://www.readbyqxmd.com/read/28472110/different-evolutionary-trajectories-of-vaccine-controlled-and-non-controlled-avian-infectious-bronchitis-viruses-in-commercial-poultry
#20
Mark W Jackwood, Dong-Hun Lee
To determine the genetic and epidemiological relationship of infectious bronchitis virus (IBV) isolates from commercial poultry to attenuated live IBV vaccines we conducted a phylogenetic network analysis on the full-length S1 sequence for Arkansas (Ark), Massachusetts (Mass) and Delmarva/1639 (DMV/1639) type viruses isolated in 2015 from clinical cases by 3 different diagnostic laboratories. Phylogenetic network analysis of Ark isolates showed two predominant groups linked by 2 mutations, consistent with subpopulations found in commercial vaccines for this IBV type...
2017: PloS One
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