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Infectious bronchitis virus

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https://www.readbyqxmd.com/read/28805451/genetic-characterisation-and-analysis-of-infectious-bronchitis-virus-isolated-from-brazilian-flocks-between-2010-and-2015
#1
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
#2
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
#3
Amir Modiri, Arash GhalyanchiLangerodui, 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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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