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Infectious bronchitis virus

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https://www.readbyqxmd.com/read/28447340/marginal-deficiencies-of-dietary-arginine-and-methionine-could-suppress-growth-performance-and-immunological-responses-in-broiler-chickens
#1
R Jahanian, M Khalifeh-Gholi
The present study was conducted to investigate the effects of different levels of dietary arginine (Arg) and methionine (Met) on performance, immune responses, and carcass characteristics of broiler chickens. A total of 540 day-old Ross 308 broiler chicks were randomly assigned into the nine experimental diets, consisting five replicates of 12 birds each. Dietary treatments included three different levels (90%, 100%, and 110% of National Research Council [NRC] specifications) of either dietary Arg or Met, which were fed to the birds according to a 3 × 3 factorial arrangement of treatments during a 42 days feeding trial...
April 26, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28437156/development-of-a-taqman-based-real-time-pcr-assay-for-rapid-and-specific-detection-of-fowl-aviadenovirus-serotype-4
#2
Jianchang Wang, Jinfeng Wang, Ping Chen, Libing Liu, Wanzhe Yuan
Twelve serotypes of fowl aviadenovirus, namely, FAdV-(1-8a and 8b-11), have been identified, among which FAdV-4 is the aetiologic agent of hepatitis hydropericardium syndrome (HHS) in chickens. Outbreaks of HHS have been documented in many countries, causing significant economic losses. Real-time PCR methods described so far in the literature cross-detect different serotypes of FAdVs. In this study, we aimed to develop a TaqMan-based real-time PCR assay for the specific detection of FAdV-4. A pair of primers targeting the hexon gene and a TaqMan probe were designed...
June 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28419351/the-effect-of-diatomaceous-earth-in-live-attenuated-infectious-bronchitis-vaccine-immune-responses-and-protection-against-challenge
#3
Ali Nazmi, Rüdiger Hauck, Lynette B Corbeil, Rodrigo A Gallardo
Live virus vaccines are commonly used in poultry production, particularly in broilers. Massive application and generation of a protective local mucosal and humoral immunity with no adverse effects is the main goal for this strategy. Live virus vaccines can be improved by adding adjuvants to boost mucosal innate and adaptive responses. In a previous study we showed that diatomaceous earth (DE) can be used as adjuvant in inactivated vaccines. The aim of this study was to test DE as adjuvant in an Ark-DPI live infectious bronchitis virus (IBV) vaccine after ocular or spray application...
April 17, 2017: Poultry Science
https://www.readbyqxmd.com/read/28390158/lithium-chloride-inhibits-early-stages-of-foot-and-mouth-disease-virus-fmdv-replication-in-vitro
#4
Fu-Rong Zhao, Yin-Li Xie, Ze-Zhong Liu, Jun-Jun Shao, Shi-Fang Li, Yong-Guang Zhang, Hui-Yun Chang
Foot-and-mouth disease virus (FMDV) causes an economically important and highly contagious disease of cloven-hoofed animals such as cattle, swine, and sheep. FMD vaccine is the traditional way to protect against the disease, which can greatly reduce its occurrence. However, the use of FMD vaccines to protect early infection is limited. Therefore, the alternative strategy of applying antiviral agents is required to control the spread of FMDV in outbreak situations. As previously reported, LiCl has obviously inhibition effects on a variety of viruses such as transmissible gastroenteritis virus (TGEV), infectious bronchitis coronavirus (IBV), and pseudorabies herpesvirus and EV-A71 virus...
April 8, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28388925/a-robust-and-cost-effective-approach-to-sequence-and-analyze-complete-genomes-of-small-rna-viruses
#5
Kiril M Dimitrov, Poonam Sharma, Jeremy D Volkening, Iryna V Goraichuk, Abdul Wajid, Shafqat Fatima Rehmani, Asma Basharat, Ismaila Shittu, Tony M Joannis, Patti J Miller, Claudio L Afonso
BACKGROUND: Next-generation sequencing (NGS) allows ultra-deep sequencing of nucleic acids. The use of sequence-independent amplification of viral nucleic acids without utilization of target-specific primers provides advantages over traditional sequencing methods and allows detection of unsuspected variants and co-infecting agents. However, NGS is not widely used for small RNA viruses because of incorrectly perceived cost estimates and inefficient utilization of freely available bioinformatics tools...
April 7, 2017: Virology Journal
https://www.readbyqxmd.com/read/28381285/new-oligonucleotide-microarray-for-rapid-diagnosis-of-avian-viral-diseases
#6
Kulyaisan T Sultankulova, Nurlan S Kozhabergenov, Vitaliy M Strochkov, Yerbol D Burashev, Kamshat A Shorayeva, Olga V Chervyakova, Nurkuisa M Rametov, Nurlan T Sandybayev, Abylay R Sansyzbay, Mukhit B Orynbayev
BACKGROUND: We developed a new oligonucleotide microarray comprising 16 identical subarrays for simultaneous rapid detection of avian viruses: avian influenza virus (AIV), Newcastle disease virus (NDV), infection bronchitis virus (IBV), and infectious bursal disease virus (IBDV) in single- and mixed-virus infections. The objective of the study was to develop an oligonucleotide microarray for rapid diagnosis of avian diseases that would be used in the course of mass analysis for routine epidemiological surveillance owing to its ability to test one specimen for several infections...
April 5, 2017: Virology Journal
https://www.readbyqxmd.com/read/28342665/recombinant-newcastle-disease-virus-expressing-the-infectious-bronchitis-virus-s1-gene-protects-chickens-against-newcastle-disease-virus-and-infectious-bronchitis-virus-challenge
#7
Ran Zhao, Junfeng Sun, Tianming Qi, Wen Zhao, Zongxi Han, Xiaopu Yang, Shengwang Liu
The recombinant LaSota strain expressing a chimeric IBV S1 gene (rLaSota-S1) was constructed with the S1 gene of the LX4 type IBV ck/CH/LDL/091022. The expression of the S1 protein was detected by an indirect immunofluorescence assay and Western blotting. The rLaSota-S1 strain was slightly attenuated, and its growth dynamics were similar to that of the parental LaSota strain. Vaccination of specific pathogen-free chickens with the rLaSota-S1 strain induced NDV hemagglutination inhibition antibodies, and it protected chickens from challenge with virulent NDV...
March 22, 2017: Vaccine
https://www.readbyqxmd.com/read/28336367/new-real-time-and-conventional-rt-pcrs-for-updated-molecular-diagnosis-of-infectious-bronchitis-virus-infection-ibv-in-chickens-in-egypt-associated-with-frequent-co-infections-with-avian-influenza-and-newcastle-disease-viruses
#8
Mahmoud M Naguib, Magdy F El-Kady, Dörte Lüschow, Kareem E Hassan, Abdel-Satar Arafa, Ali El-Zanaty, Mohamed K Hassan, Hafez M Hafez, Christian Grund, Timm C Harder
In Egypt, currently two geographically restricted genotypes of the infectious bronchitis coronavirus (IBV) are circulating with detrimental effects for poultry industry. A sensitive real-time RT-PCR assay targeting the IBV nucleocapsid gene (N) was developed to screen clinical samples for presence of IBV. Conventional RT-PCRs amplifying hypervariable regions (HVRs 1-2 and 3) of the IBV S1 gene were developed and amplificates used for nucleotide sequence-based typing of IBV field strains in Egyptian chickens directly from clinical samples...
March 21, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28316013/the-papain-like-protease-of-avian-infectious-bronchitis-virus-has-deubiquitinating-activity
#9
Liping Yu, Xiaorong Zhang, Tianqi Wu, Yuyang Wang, Jie Meng, Qian Liu, Xiaosai Niu, Yantao Wu
Coronavirus papain-like proteases (PLPs) can act as proteases that process virus-encoded large replicase polyproteins and also as deubiquitinating (DUB) enzymes. Like the PLPs of other coronaviruses (CoVs), the avian infectious bronchitis virus (IBV) PLP catalyzes proteolysis of Gly-Gly dipeptide bonds to release mature cleavage products. However, the other functions of the IBV PLP are not well understood. In this study, we found that IBV exhibits strong global DUB activity with significant reductions of the levels of ubiquitin (Ub)-, K48-, and K63-conjugated proteins...
March 18, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28301234/minimum-infectious-dose-determination-of-the-arkansas-delmarva-poultry-industry-infectious-bronchitis-virus-vaccine-delivered-by-hatchery-spray-cabinet
#10
Christina M Leyson, Deborah A Hilt, Brian J Jordan, Mark W Jackwood
The Arkansas Delmarva Poultry Industry (ArkDPI) infectious bronchitis virus (IBV) vaccine is effective when administered by eye drop, where the vaccine virus is able to infect and replicate well in birds and is able to induce protection against homologous challenge. However, accumulating evidence indicates that the ArkDPI vaccine is ineffective when applied by hatchery spray cabinet using the same manufacturer-recommended dose per bird. For this study, we aimed to determine the minimum infectious dose for the spray-administered ArkDPI vaccine, which we designate as the dose that achieves the same level of infection and replication as the eye drop-administered ArkDPI vaccine...
March 2017: Avian Diseases
https://www.readbyqxmd.com/read/28257598/structural-basis-for-dimerization-and-rna-binding-of-avian-infectious-bronchitis-virus-nsp9
#11
Tingting Hu, Cheng Chen, Huiyan Li, Yanshu Dou, Ming Zhou, Deren Lu, Qi Zong, Yulei Li, Cheng Yang, Zhihui Zhong, Namit Singh, Honggang Hu, Rundong Zhang, Haitao Yang, Dan Su
The potential for infection by coronaviruses (CoVs) has become a serious concern with the recent emergence of Middle East respiratory syndrome and severe acute respiratory syndrome (SARS) in the human population. CoVs encode two large polyproteins, which are then processed into 15-16 nonstructural proteins (nsps) that make significant contributions to viral replication and transcription by assembling the RNA replicase complex. Among them, nsp9 plays an essential role in viral replication by forming a homodimer that binds single-stranded RNA...
May 2017: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/28224252/heat-shock-protein-70-in-lung-and-kidney-of-specific-pathogen-free-chickens-is-a-receptor-associated-protein-that-interacts-with-the-binding-domain-of-the-spike-protein-of-infectious-bronchitis-virus
#12
ZhiKun Zhang, Xin Yang, PengWei Xu, Xuan Wu, Long Zhou, HongNing Wang
Avian infectious bronchitis virus (IBV) is a member of the family Coronaviridae. A binding domain that mediates the attachment of the virus to its receptor has been identified in the S1 protein of prototype IBV strain M41. In this study, we identified this binding domain in a different strain, as well as the cellular proteins that interact with it. First, we expressed the S1N proteins (residues 19-270) of M41 and another isolate, SCZJ3, and compared the binding capacities of recombinant S1N-M41 and S1N-SCZJ3 to host tissues...
February 21, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28223026/development-and-application-of-nsp5-elisa-for-the-detection-of-antibody-to-infectious-bronchitis-virus
#13
Jing Lei, Tingting Shi, Dongnan Sun, Kaikun Mo, Yan Yan, Yulan Jin, Min Liao, Jiyong Zhou
Infectious bronchitis virus (IBV) continues to be one of the most important poultry pathogens worldwide. The current commercially available enzyme-linked immunosorbent assay (ELISA) kits for IBV specific antibody detection are mostly based on the whole virion, and few serological tests based on nonstructural proteins of IBV have been developed. Herein, an alternative indirect ELISA for detection of IBV antibody was developed with IBV nonstructural protein 5 (nsp5) produced by Escherichia coli. Using an indirect immunofluorescence assay (IFA) and a commercial ELISA kit as reference, we optimized the nsp5-ELISA and determined its cut-off as 0...
May 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28199419/early-immune-responses-and-development-of-pathogenesis-of-avian-infectious-bronchitis-viruses-with-different-virulence-profiles
#14
Cintia Hiromi Okino, Marcos Antônio Zanella Mores, Iara Maria Trevisol, Arlei Coldebella, Hélio José Montassier, Liana Brentano
Avian infectious bronchitis virus (IBV) primarily replicates in epithelial cells of the upper respiratory tract of chickens, inducing both morphological and immune modulatory changes. However, the association between the local immune responses induced by IBV and the mechanisms of pathogenesis has not yet been completely elucidated. This study compared the expression profile of genes related to immune responses in tracheal samples after challenge with two Brazilian field isolates (A and B) of IBV from the same genotype, associating these responses with viral replication and with pathological changes in trachea and kidney...
2017: PloS One
https://www.readbyqxmd.com/read/28116527/comparative-genomics-of-qx-like-infectious-bronchitis-viruses-in-korea
#15
Seung-Min Hong, Hyuk-Joon Kwon, Kang-Seuk Choi, Jae-Hong Kim
To minimize the spread of infectious bronchitis virus (IBV), domestic fowl have been extensively vaccinated with the KM91 strain. However, various IBV QX-like virus strains have become increasingly prevalent in Korea. We conducted comparative genomic analyses of seven QX-like viruses: early viruses (n = 2), new cluster 1 (NC1; recombinants of KM91 and the early QX-like viruses, n = 3) and recurrent viruses (n = 2), to understand their genomic backgrounds. The early and NC1 viruses had KM91-like backgrounds, but the recurrent viruses had QX-like genomic backgrounds...
May 2017: Archives of Virology
https://www.readbyqxmd.com/read/28110778/identification-of-a-novel-recombinant-virulent-avian-infectious-bronchitis-virus
#16
Haisheng Zhou, Meihong Zhang, Xue Tian, Hongxia Shao, Kun Qian, Jianqiang Ye, Aijian Qin
The emergence of new infectious bronchitis virus (IBV) variants is often disastrous in the poultry industry. In this study, an IBV, CK/CH/2010/JT-1, was isolated from an H120- and 4/91-IBV-vaccinated flock in China. Antisera against vaccine strains H120 and 4/91 could not provide effective protection against CK/CH/2010/JT-1 in virus neutralization assays. CK/CH/2010/JT-1 could cause 43.75% mortality with respiratory and severe renal lesions in inoculated chickens. Phylogenetic analysis of the S1 gene showed that CK/CH/2010/JT-1 and 31 other isolates could be grouped as a new genotypic cluster...
February 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28108730/the-relationship-between-liver-kidney-impairment-and-viral-load-after-nephropathogenic-infectious-bronchitis-virus-infection-in-embryonic-chickens
#17
Qiqi Huang, Xiaona Gao, Ping Liu, Huayuan Lin, Weilian Liu, Guohui Liu, Jin Zhang, Guangfu Deng, Caiying Zhang, Huabin Cao, Xiaoquan Guo, Guoliang Hu
To examine the relationship of impairments of the liver and kidney with viral load after nephropathogenic infectious bronchitis virus (NIBV) infection in embryonic chickens, 120 specific-pathogen-free Leghorn embryonated chicken eggs were randomly divided into two groups (infected and control), with three replicates per group and 20 eggs in each replicate. The eggs in the infected and control groups were challenged with 0.2 mL of 10(5.5) ELD50 NIBV and sterile saline solution, respectively. The embryonic chickens' plasma and liver and kidney tissues were collected at 1, 3, and 5 days post-inoculation (dpi), the liver and kidney functional parameters were quantified, and the tissue viral loads were determined with real-time PCR...
January 20, 2017: Poultry Science
https://www.readbyqxmd.com/read/28081264/the-important-role-of-lipid-raft-mediated-attachment-in-the-infection-of-cultured-cells-by-coronavirus-infectious-bronchitis-virus-beaudette-strain
#18
Huichen Guo, Mei Huang, Quan Yuan, Yanquan Wei, Yuan Gao, Lejiao Mao, Lingjun Gu, Yong Wah Tan, Yanxin Zhong, Dingxiang Liu, Shiqi Sun
Lipid raft is an important element for the cellular entry of some viruses, including coronavirus infectious bronchitis virus (IBV). However, the exact role of lipid rafts in the cellular membrane during the entry of IBV into host cells is still unknown. In this study, we biochemically fractionated IBV-infected cells via sucrose density gradient centrifugation after depleting plasma membrane cholesterol with methyl-β-cyclodextrin or Mevastatin. Our results demonstrated that unlike IBV non-structural proteins, IBV structural proteins co-localized with lipid raft marker caveolin-1...
2017: PloS One
https://www.readbyqxmd.com/read/28062013/origin-and-evolution-of-lx4-genotype-infectious-bronchitis-coronavirus-in-china
#19
Wenjun Zhao, Mengying Gao, Qianqian Xu, Yang Xu, Yan Zhao, Yuqiu Chen, Tingting Zhang, Qiuling Wang, Zongxi Han, Huixin Li, Lingfeng Chen, Shuling Liang, Yuhao Shao, Shengwang Liu
We investigated the genomic characteristics of 110 LX4 genotype strains of infectious bronchitis viruses (IBVs) isolated between 1995 and 2005 in China. The genome of these IBVs varies in size from 27596bp to 27790bp. Most IBV strains have the typical genomic organization of other gamacoronaviruses, however, two strains lacked 3a and 5b genes as a result of a nucleotide change within the start codon in the 3a or 5b genes. Analysis of our 110 viruses revealed that recombination events may be responsible for the emergence of the LX4 genotype with different topologies...
January 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28062000/identification-and-molecular-characterization-of-a-novel-serotype-infectious-bronchitis-virus-gi-28-in-china
#20
Yuqiu Chen, Lei Jiang, Wenjun Zhao, Liangliang Liu, Yan Zhao, Yuhao Shao, Huixin Li, Zongxi Han, Shengwang Liu
Avian infectious bronchitis coronavirus (IBV) is a major poultry pathogen. A characteristic feature of IBV is the occurrence of many different strains belonging to different serotypes, which renders complete control of the disease by vaccination a challenging task due to the poor cross-protection between different serotypes. In this study, based on the results of S1 sequence analysis and virus cross-neutralization tests, IBV strain ck/CH/LGX/111119 was found to be genetically and antigenically different from other known IBV types, representing not only a novel genotype, but also a novel serotype (designated as GI-28)...
January 2017: Veterinary Microbiology
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