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Infectious bronchitis virus

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https://www.readbyqxmd.com/read/29350071/disclosing-respiratory-coinfections-a-broad-range-panel-assay-for-avian-respiratory-pathogens-on-a-nanofluidic-pcr-platform
#1
Guillaume Croville, Charlotte Foret, Pauline Heuillard, Alexis Senet, Mattias Delpont, Mohammed Mouahid, Mariette F Ducatez, Faouzi Kichou, Jean-Luc Guerin
Respiratory syndromes (RS) are among the most significant pathological conditions in food animals and are caused by complex coactions of pathogens and environmental factors. In poultry, low pathogenic avian Influenza A viruses, metapneumoviruses, infectious bronchitis virus, infectious laryngotracheitis virus, Mycoplasma spp. Escherichia coli and/or Ornithobacterium rhinotracheale (ORT) in turkeys, are considered as key co-infectious agents of respiratory syndromes. Aspergillus sp., Pasteurella multocida, Avibacterium paragallinarum or Chlamydia psittaci may also be involved in respiratory outbreaks...
January 19, 2018: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/29337625/molecular-characterization-of-qx-like-and-variant-infectious-bronchitis-virus-strains-in-malaysia-based-on-partial-genomic-sequences-comprising-the-s-3a-3b-e-m-intergenic-region-5a-5b-n-gene-order
#2
N P Khanh, S W Tan, S K Yeap, D A Satharasinghe, M Hair-Bejo, T N Bich, A R Omar
Infectious bronchitis virus (IBV) is one of the major poultry pathogens of global importance. However, the prevalence of IBV strains in Malaysia is poorly characterized. The partial genomic sequences (6.8 kb) comprising the S-3a/3b-E-M-intergenic region-5a/5b-N gene order of 11 Malaysian IBVs isolated in 2014 and 2015 were sequenced using next-generation sequencing technology. Phylogenetic and pairwise sequence comparison analysis showed that the isolated IBVs are divided into two groups. Group 1 (IBS124/2015, IBS125/2015, IBS126/2015, IBS130/2015, IBS131/2015, IBS138/2015, and IBS142/2015) shared 90%-95% nucleotide and deduced amino acid similarities to the QX-like strain...
December 2017: Avian Diseases
https://www.readbyqxmd.com/read/29337615/efficacy-of-massachusetts-and-793b-vaccines-against-infectious-bronchitis-moroccan-italy-02-virus-in-specific-pathogen-free-chickens-and-commercial-broilers
#3
Sakhia F Z Belkasmi, Siham Fellahi, Sajid Umar, Mattias Delpont, Maxence Delverdier, Marie-Noëlle Lucas, Céline Bleuart, Faouzi Kichou, Saâdia Nassik, Jean-Luc Guerin, Ouafaa Fassi Fihri, Mariette F Ducatez, Mohammed El Houadfi
The ability of commercial vaccines H120 and 4/91 to protect against Moroccan-Italy 02 infectious bronchitis virus (Mor-It02) was investigated in specific-pathogen-free (SPF) chickens and commercial broiler chickens. Commercial broiler chicks (Experiment 1) were vaccinated at the hatchery with H120 vaccine at Day 1, and challenged at Day 21 with 104 50% egg-infective dose (EID50) of Mor-It02. All chicks were observed daily for clinical signs attributable to Mor-It02 infection during the 10 days postchallenge (pc)...
December 2017: Avian Diseases
https://www.readbyqxmd.com/read/29330815/supplementing-dietary-rosemary-rosmarinus-officinalis-l-powder-and-vitamin-e-in-broiler-chickens-evaluation-of-humoral-immune-response-lymphoid-organs-and-blood-proteins
#4
Hossein Rostami, Alireza Seidavi, Mohammad Dadashbeiki, Yadollah Asadpour, João Simões, Assar Ali Shah, Vito Laudadio, Caterina Losacco, Antonella Perillo, Vincenzo Tufarelli
The aim of the present study was to evaluate the effect rosemary (Rosmarinus officinalis L.) powder (RP) and vitamin E (VE) at different levels on humoral immunity of broilers during a 42-day production cycle. A total of 270 1-day-old male chicks were assigned to nine groups with three replicates of ten birds each, and diets were supplemented with 0, 0.5, or 1.0% RP and 0, 100, or 200 mg/kg VE, respectively. Commercial-inactivated vaccines against avian influenza (AI) and Newcastle disease (ND) viruses, and living infectious bronchitis virus (IBV) vaccine were administered by spray method...
January 12, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29330060/induction-of-innate-immune-response-following-introduction-of-infectious-bronchitis-virus-ibv-in-the-trachea-and-renal-tissues-of-chickens
#5
Xin Yang, Jianan Li, Hui Liu, Peng Zhang, Danyu Chen, Shuai Men, Xiaocheng Li, Hongning Wang
Infectious bronchitis (IB) is a highly contagious respiratory disease of chickens, which is caused by the infectious bronchitis virus (IBV). The innate immune response is crucial for antiviral infections and revealing the pathogenic mechanisms of IBV. In this study, we presents an evaluation of interferon (I, II and III IFNs) in renal and tracheal samples from chickens experimentally infected previously vaccinated or not. The results suggest differential expression of chicken interferon, among them type I IFN elaborate a major role in fighting off virus...
January 9, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29327786/differential-effects-of-experimental-hyperthyroidism-on-declined-immunity-of-broiler-chicken
#6
M S Khilji, M A Sandhu, M S Yousaf, A A Saeed, H U Rehman, H Zaneb, M A Rashid
Thyroid hormones (THs) are involved in the development of lymphoid organs and regulation of immune function in birds. However, their role as an immune-modulator in the hyperthyroid state is still debatable. To explore the interrelationship of thyroxine (T4 ) and the immune system, chicks were divided into three groups. Group I was comprised of control birds, who received the basal diet while group II and III were given diets supplemented with 5 μg and 10 μg thyroxine/kg feed, respectively, from 15 to 28 days of age...
January 12, 2018: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/29302792/mitochondrial-bioenergy-alterations-in-avian-hd11-macrophages-infected-with-infectious-bronchitis-virus
#7
Sergio E L da Silva, Helena L Ferreira, Andrea F Garcia, Felipe E S Silva, Roberto Gameiro, Carolina U F Fabri, Dielson S Vieira, Tereza C Cardoso
To establish an association between mitochondrial dysfunction and apoptosis following infectious bronchitis virus (IBV) infection, HD11 avian macrophage cells were infected with the Massachusetts 41 (M41) strain. Our results show that the M41 strain of IBV induced cytopathic effects followed by the release of new viral particles. Elevated numbers of apoptotic cells were observed at 24, 48 and 72 h post-infection (p.i.). Viral infection was associated with mitochondrial membrane depolarization and reactive oxygen species (ROS) production at all of the examined timepoints p...
January 4, 2018: Archives of Virology
https://www.readbyqxmd.com/read/29291237/genotyping-and-phylogenetic-analysis-of-infectious-bronchitis-virus-isolated-from-broiler-chickens-in-kashmir
#8
Rafia Parveen, Iqra Farooq, Showkat Ahangar, Salik Nazki, Zahoor Dar, Tanveer Dar, Shayaib Kamil, Pervaiz Dar
Infectious bronchitis virus (IBV) is responsible for significant economic losses to the poultry industry across the world. The enormous genetic diversity of IBV poses difficulty in diagnosing and controlling the virus. To understand the nature of IBV prevalent in the Kashmir Himalayas, we characterized two field strains, isolated from non-immunized broiler chickens, by sequence and phylogenetic analysis of S1 subunit of the spike glycoprotein. The analysis revealed both the isolates are identical to each other, with nucleotide and amino acid sequence identities of 99...
December 2017: Virusdisease
https://www.readbyqxmd.com/read/29290303/serological-evidence-for-eight-globally-important-poultry-viruses-in-trinidad-tobago
#9
Arianne Brown Jordan, Jamie Sookhoo, Lemar Blake, Paul Crooks, Zul Mohammed, Judy Molawatti-Bisnath, Christine V F Carrington, Christopher A L Oura
Viruses affecting poultry cause significant levels of disease leading to severe economic losses among poultry farmers worldwide. The Americas region continues to be vulnerable to the spread of poultry viruses across the continents and Caribbean island chains. In Trinidad and Tobago (T&T) there is limited information on the viruses circulating in poultry. Many flock are vulnerable to infection and there are occasional outbreaks of disease resulting in high levels of morbidity and mortality. This study aims to identify important viruses of poultry circulating in T&T through a broad-based surveillance approach...
January 1, 2018: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/29238080/activation-of-the-c-jun-nh2-terminal-kinase-pathway-by-coronavirus-infectious-bronchitis-virus-promotes-apoptosis-independently-of-c-jun
#10
To Sing Fung, Ding Xiang Liu
Mitogen-activated protein kinases (MAPKs) are conserved protein kinases that regulate a variety of important cellular signaling pathways. Among them, c-Jun N-terminal kinases (JNK) are known to be activated by various environmental stresses including virus infections. Previously, activation of the JNK pathway has been detected in cells infected with several coronaviruses. However, detailed characterization of the pathway as well as its implication in host-virus interactions has not been fully investigated. Here we report that the JNK pathway was activated in cells infected with the avian coronavirus infectious bronchitis virus (IBV)...
December 13, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/29223788/a-multiplex-real-time-rt-pcr-for-simultaneous-detection-of-four-most-common-avian-respiratory-viruses
#11
Nacira Laamiri, Rim Aouini, Boutheina Marnissi, Abdeljelil Ghram, Issam Hmila
A one-step multiplex real-time reverse transcription-PCR (rRT-PCR) assay was developed for simultaneous detection and quantification of four avian respiratory viruses: avian influenza virus (AIV), infectious bronchitis virus (IBV), Newcastle disease virus (NDV) and infectious laryngotracheitis virus (ILTV). In comparison with the singleplex rRT-PCR, the specificity, the sensitivity and the reproducibility of the new assay were evaluated and validated using 70 clinical samples. The optimal cutoff point, the corresponding limit of quantification (LoQ) and the limit of detection (LoD) were statistical established based on receiver operating characteristic (ROC) curve analysis...
December 7, 2017: Virology
https://www.readbyqxmd.com/read/29182756/acute-phase-proteins-and-stress-markers-in-the-immediate-response-to-a-combined-vaccination-against-newcastle-disease-and-infectious-bronchitis-viruses-in-specific-pathogen-free-spf-layer-chicks
#12
Haider Kaab, Maureen M Bain, Peter David Eckersall
Vaccination is an important tool in poultry health, but is itself a stressor often resulting in a reduction in feed intake, body weight gain, and nutrient digestibility. In other species, vaccination is associated with an immediate acute-phase response. As an important immune parameter, the circulating heterophil/lymphocyte (H/L) ratio is a well-recognized parameter of stress in poultry. In this study, the effects of a routinely used commercial poultry vaccine on the acute phase response (APR) and H/L ratios in specific pathogen-free (SPF) layer chicks was examined to determine if post vaccination (PV) stress and an APR occur...
November 22, 2017: Poultry Science
https://www.readbyqxmd.com/read/29174688/comparative-transcriptome-analysis-reveals-induction-of-apoptosis-in-chicken-kidney-cells-associated-with-the-virulence-of-nephropathogenic-infectious-bronchitis-virus
#13
Hui Liu, Xin Yang, Zhikun Zhang, Jianan Li, Wencheng Zou, Fanya Zeng, Hongning Wang
Avian infectious bronchitis virus (IBV) that causes respiratory and nephritic diseases in chicken is a major poultry pathogen leading to serious economic loss worldwide. The nephropathogenic IBV strains cause nephritis and kidney lesions intrinsically and the pathogenic mechanism is still unclear. In the present study, SPF chicks were infected with three nephropathogenic IBVs of different virulence and their gene expression profiles in chicken kidney were compared at transcriptome level. As a result, 1279 differentially expressed (DE) genes were found in very virulent SCDY2 inoculated group, 145 in virulent SCK2 group and 74 in non-virulent LDT3-A group when compared to mock infected group...
November 21, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29170045/astragalus-polysaccharides-inhibit-avian-infectious-bronchitis-virus-infection-by-regulating-viral-replication
#14
Pengju Zhang, Xuefeng Liu, Weixia Wang, Haiyan Liu, Xiaohui Liu, Xintao Li, Xinghong Wu
The avian coronavirus causes infectious bronchitis (IB), which is one of the most serious diseases affecting the avian industry worldwide. However, there are no effective strategies for controlling the IB virus (IBV) at present. Therefore, development of novel antiviral treatment strategies is urgently required. As reported, astragalus polysaccharides (APS) have potential antiviral effects against several viruses; however, the antiviral effect of APS against IBV remains unclear. In this study, we explored whether APS had the potential to inhibit IBV infectionby utilizing several in vitro experimental approaches...
November 20, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29166280/differentiation-of-infectious-bronchitis-virus-vaccine-strains-ma5-and-4-91-by-taqman-real-time-pcr
#15
T Stenzel, D Dziewulska, M Śmiałek, B Tykałowski, J Kowalczyk, A Koncicki
The aim of this study was to develop rapid molecular assays for differentiating vaccine strains Ma5 and 4/91 of the infectious bronchitis virus (IBV). Specific primers and probes for S1 and N genes were designed based on the nucleotide sequences of both vaccine strains. Cross-reactivity was not observed. Assay sensitivity was 2.373 × 103 copies of the Ma5 strain, and 3.852 x 103 copies of the 4/91 strain. Samples belonging to a known genotype demonstrated that the designed assays supported rapid and sensitive detection of Ma5 and 4/91 vaccine strains of IBV...
September 26, 2017: Polish Journal of Veterinary Sciences
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
#16
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
#17
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
#18
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
#19
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
#20
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
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