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Quinteros JA, Noormohammadi AH, Lee SW, Browning GF, Diaz‐Méndez A. Genomics and pathogenesis of the avian coronavirus infectious bronchitis virus. Aust Vet J 2022; 100:496-512. [PMID: 35978541 PMCID: PMC9804484 DOI: 10.1111/avj.13197] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 04/25/2022] [Accepted: 05/02/2022] [Indexed: 01/05/2023]
Abstract
Infectious bronchitis virus (IBV) is a member of the family Coronaviridae, together with viruses such as SARS-CoV, MERS-CoV and SARS-CoV-2 (the causative agent of the COVID-19 global pandemic). In this family of viruses, interspecies transmission has been reported, so understanding their pathobiology could lead to a better understanding of the emergence of new serotypes. IBV possesses a single-stranded, non-segmented RNA genome about 27.6 kb in length that encodes several non-structural and structural proteins. Most functions of these proteins have been confirmed in IBV, but some other proposed functions have been based on research conducted on other members of the family Coronaviridae. IBV has variable tissue tropism depending on the strain, and can affect the respiratory, reproductive, or urinary tracts; however, IBV can also replicate in other organs. Additionally, the pathogenicity of IBV is also variable, with some strains causing only mild clinical signs, while infection with others results in high mortality rates in chickens. This paper extensively and comprehensibly reviews general aspects of coronaviruses and, more specifically, IBV, with emphasis on protein functions and pathogenesis. The pathogenicity of the Australian strains of IBV is also reviewed, describing the variability between the different groups of strains, from the classical to the novel and recombinant strains. Reverse genetic systems, cloning and cell culture growth techniques applicable to IBV are also reviewed.
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Affiliation(s)
- JA Quinteros
- Asia‐Pacific Centre for Animal Health, Melbourne Veterinary School, Faculty of Veterinary and Agricultural SciencesThe University of MelbourneParkvilleVictoriaAustralia,Present address:
Escuela de Ciencias Agrícolas y VeterinariasUniversidad Viña del Mar, Agua Santa 7055 2572007Viña del MarChile
| | - AH Noormohammadi
- Asia‐Pacific Centre for Animal Health, Melbourne Veterinary School, Faculty of Veterinary and Agricultural SciencesThe University of MelbourneWerribeeVictoriaAustralia
| | - SW Lee
- Asia‐Pacific Centre for Animal Health, Melbourne Veterinary School, Faculty of Veterinary and Agricultural SciencesThe University of MelbourneParkvilleVictoriaAustralia,College of Veterinary MedicineKonkuk UniversitySeoulRepublic of Korea
| | - GF Browning
- Asia‐Pacific Centre for Animal Health, Melbourne Veterinary School, Faculty of Veterinary and Agricultural SciencesThe University of MelbourneParkvilleVictoriaAustralia
| | - A Diaz‐Méndez
- Asia‐Pacific Centre for Animal Health, Melbourne Veterinary School, Faculty of Veterinary and Agricultural SciencesThe University of MelbourneParkvilleVictoriaAustralia
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2
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Tanhaei M, Mohebbi SR, Hosseini SM, Rafieepoor M, Kazemian S, Ghaemi A, Shamloei S, Mirjalali H, Asadzadeh Aghdaei H, Zali MR. The first detection of SARS-CoV-2 RNA in the wastewater of Tehran, Iran. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:38629-38636. [PMID: 33738744 PMCID: PMC7972808 DOI: 10.1007/s11356-021-13393-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Accepted: 03/08/2021] [Indexed: 05/03/2023]
Abstract
Following the official announcement of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) worldwide pandemic spread by WHO on March 11, 2020, more than 300,000 COVID-19 cases reported in Iran resulting in approximately 17,000 deaths as of August 2, 2020. In the present survey, we investigated the presence of SARS-CoV-2 RNA in raw and treated wastewater samples in Tehran, Iran. Untreated and treated wastewater samples were gathered from four wastewater treatment plants over a month period from June to July 2020. Firstly, an adsorption-elution concentration method was tested using an avian coronavirus (infectious bronchitis virus, IBV). Then, the method was effectively employed to survey the presence of SARS-CoV-2 genome in influent and effluent wastewater samples. SARS-CoV-2 RNA was found in 8 out of 10 treated wastewater samples utilizing a reverse transcription-quantitative polymerase chain reaction (RT-qPCR) test to detect ORF1ab and N genes. Moreover, the rate of positivity in wastewater samples increased in last sample collection that shows circulation of SARS-CoV-2 was increased among the population. In addition, the high values detected in effluent wastewater from local wastewater treatment plants have several implications in health and ecology that should be further assessed.
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Affiliation(s)
- Mohammad Tanhaei
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Reza Mohebbi
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Arabi str., Yaman Ave., Velenjak, Tehran, Iran.
| | - Seyed Masoud Hosseini
- Department of Microbiology and Microbial Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran
| | - Maedeh Rafieepoor
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Shabnam Kazemian
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Arabi str., Yaman Ave., Velenjak, Tehran, Iran
| | - Amir Ghaemi
- Department of Virology, Pasteur Institute of Iran, Tehran, Iran
| | - Sharareh Shamloei
- Department of Water and Wastewater Quality Control Laboratory, Water and Wastewater Company, Tehran, Iran
| | - Hamed Mirjalali
- Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamid Asadzadeh Aghdaei
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Zali
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Arabi str., Yaman Ave., Velenjak, Tehran, Iran
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3
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Molecular Biology and Pathological Process of an Infectious Bronchitis Virus with Enteric Tropism in Commercial Broilers. Viruses 2021; 13:v13081477. [PMID: 34452342 PMCID: PMC8402673 DOI: 10.3390/v13081477] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/22/2021] [Accepted: 07/24/2021] [Indexed: 11/16/2022] Open
Abstract
Infectious bronchitis virus (IBV) induces respiratory and urogenital disease in chickens. Although IBV replicates in the gastrointestinal tract, enteric lesions are uncommon. We have reported a case of runting-stunting syndrome in commercial broilers from which an IBV variant was isolated from the intestines. The isolate, CalEnt, demonstrated an enteric tissue tropism in chicken embryos and SPF chickens experimentally. Here, we determined the full genome of CalEnt and compared it to other IBV strains, in addition to comparing the pathobiology of CalEnt and M41 in commercial broilers. Despite the high whole-genome identity to other IBV strains, CalEnt is rather unique in its nucleotide composition. The S gene phylogenetic analyses showed great similarity between CalEnt and Cal 99. Clinically, vent staining was slightly more frequent in CalEnt-infected birds than those challenged with M41. Furthermore, IBV IHC detection was more evident and the viral shedding in feces was overall higher with the CalEnt challenge compared with M41. Despite underlying intestinal lesions caused by coccidiosis and salmonellosis vaccination, microscopic lesions in CalEnt-infected chickens were more severe than in M41-infected chickens or controls, supporting the enteric tropism of CalEnt. Further studies in SPF chickens are needed to determine the pathogenesis of the virus, its molecular mechanisms for the enteric tropism, and its influence in intestinal health.
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Quinteros JA, Ignjatovic J, Chousalkar KK, Noormohammadi AH, Browning GF. Infectious bronchitis virus in Australia: a model of coronavirus evolution - a review. Avian Pathol 2021; 50:295-310. [PMID: 34126817 DOI: 10.1080/03079457.2021.1939858] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Infectious bronchitis virus (IBV) was first isolated in Australia in 1962. Ongoing surveillance and characterization of Australian IBVs have shown that they have evolved separately from strains found throughout the rest of the world, resulting in the evolution of a range of unique strains and changes in the dominant wild-type strains, affecting tissue tropism, pathogenicity, antigenicity, and gene arrangement. Between 1961 and 1976 highly nephropathogenic genotype GI-5 and GI-6 strains, causing mortalities of 40% to 100%, predominated, while strains causing mainly respiratory disease, with lower mortality rates, have predominated since then. Since 1988, viruses belonging to two distinct and novel genotypes, GIII and GV, have been detected. The genome organization of the GIII strains has not been seen in any other gammacoronavirus. Mutations that emerged soon after the introduction of vaccination, incursion of strains with a novel lineage from unknown sources, recombination between IBVs from different genetic lineages, and gene translocations and deletions have contributed to an increasingly complex IBV population. These processes and the consequences of this variation for the biology of these viruses provide an insight into the evolution of endemic coronaviruses during their control by vaccination and may provide a better understanding of the potential for evolution of other coronaviruses, including SARS-CoV-2. Furthermore, the continuing capacity of attenuated IBV vaccines developed over 40 years ago to provide protection against viruses in the same genetic lineage provides some assurance that coronavirus vaccines developed to control other coronaviruses may continue to be effective for an extended period.
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Affiliation(s)
- José A Quinteros
- Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Australia
| | - Jagoda Ignjatovic
- Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Werribee, Australia
| | - Kapil K Chousalkar
- School of Animal & Veterinary Sciences, University of Adelaide, Roseworthy, Australia
| | - Amir H Noormohammadi
- Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Werribee, Australia
| | - Glenn F Browning
- Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Australia
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Jevšnik Virant M, Černe D, Petrovec M, Paller T, Toplak I. Genetic Characterisation and Comparison of Three Human Coronaviruses (HKU1, OC43, 229E) from Patients and Bovine Coronavirus (BCoV) from Cattle with Respiratory Disease in Slovenia. Viruses 2021; 13:v13040676. [PMID: 33920821 PMCID: PMC8071153 DOI: 10.3390/v13040676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/10/2021] [Accepted: 04/12/2021] [Indexed: 11/16/2022] Open
Abstract
Coronaviruses (CoV) are widely distributed pathogens of human and animals and can cause mild or severe respiratory and gastrointestinal disease. Antigenic and genetic similarity of some CoVs within the Betacoronavirus genus is evident. Therefore, for the first time in Slovenia, we investigated the genetic diversity of partial 390-nucleotides of RNA-dependent-RNA polymerase gene (RdRp) for 66 human (HCoV) and 24 bovine CoV (BCoV) positive samples, collected between 2010 and 2016 from human patients and cattle with respiratory disease. The characterized CoV strains belong to four different clusters, in three separate human clusters HCoV-HKU1 (n = 34), HCoV-OC43 (n = 31) and HCoV 229E (n = 1) and bovine grouping only as BCoVs (n = 24). BCoVs from cattle and HCoV-OC43 were genetically the most closely related and share 96.4-97.1% nucleotide and 96.9-98.5% amino acid identity.
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Affiliation(s)
- Monika Jevšnik Virant
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, Zaloška 4, 1000 Ljubljana, Slovenia; (M.J.V.); (M.P.)
| | - Danijela Černe
- Virology Unit, Institute of Microbiology and Parasitology, Veterinary Faculty, University of Ljubljana, Gerbičeva 60, 1115 Ljubljana, Slovenia;
| | - Miroslav Petrovec
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, Zaloška 4, 1000 Ljubljana, Slovenia; (M.J.V.); (M.P.)
| | - Tomislav Paller
- National Veterinary Institute, Veterinary Faculty, University of Ljubljana, Gerbičeva 60, 1115 Ljubljana, Slovenia;
| | - Ivan Toplak
- Virology Unit, Institute of Microbiology and Parasitology, Veterinary Faculty, University of Ljubljana, Gerbičeva 60, 1115 Ljubljana, Slovenia;
- Correspondence:
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Colina SE, Serena MS, Echeverría MG, Metz GE. Clinical and molecular aspects of veterinary coronaviruses. Virus Res 2021; 297:198382. [PMID: 33705799 PMCID: PMC7938195 DOI: 10.1016/j.virusres.2021.198382] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 12/20/2020] [Accepted: 03/04/2021] [Indexed: 12/12/2022]
Abstract
Coronaviruses are a large group of RNA viruses that infect a wide range of animal species. The replication strategy of coronaviruses involves recombination and mutation events that lead to the possibility of cross-species transmission. The high plasticity of the viral receptor due to a continuous modification of the host species habitat may be the cause of cross-species transmission that can turn into a threat to other species including the human population. The successive emergence of highly pathogenic coronaviruses such as the Severe Acute Respiratory Syndrome (SARS) in 2003, the Middle East Respiratory Syndrome Coronavirus in 2012, and the recent SARS-CoV-2 has incentivized a number of studies on the molecular basis of the coronavirus and its pathogenesis. The high degree of interrelatedness between humans and wild and domestic animals and the modification of animal habitats by human urbanization, has favored new viral spreads. Hence, knowledge on the main clinical signs of coronavirus infection in the different hosts and the distinctive molecular characteristics of each coronavirus is essential to prevent the emergence of new coronavirus diseases. The coronavirus infections routinely studied in veterinary medicine must be properly recognized and diagnosed not only to prevent animal disease but also to promote public health.
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Affiliation(s)
- Santiago Emanuel Colina
- Virology, Faculty of Veterinary Sciences, National University of La Plata, La Plata, Argentina; CONICET (National Scientific and Technical Research Council), CCT La Plata, Argentina
| | - María Soledad Serena
- Virology, Faculty of Veterinary Sciences, National University of La Plata, La Plata, Argentina; CONICET (National Scientific and Technical Research Council), CCT La Plata, Argentina
| | - María Gabriela Echeverría
- Virology, Faculty of Veterinary Sciences, National University of La Plata, La Plata, Argentina; CONICET (National Scientific and Technical Research Council), CCT La Plata, Argentina
| | - Germán Ernesto Metz
- Virology, Faculty of Veterinary Sciences, National University of La Plata, La Plata, Argentina; CONICET (National Scientific and Technical Research Council), CCT La Plata, Argentina.
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7
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Kaneda M, Takahashi S, Naito I, Chiba Y, Hikono H, Murakami K. Nationwide Survey of Infectious Bronchitis Virus on Layer Farms in Japan During 2015. Avian Dis 2020; 64:80-84. [PMID: 32267128 DOI: 10.1637/0005-2086-64.1.80] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 06/24/2019] [Indexed: 11/05/2022]
Abstract
After accumulating data through a nationwide survey, we characterized the recent prevalences and geographic distributions of various genotypes of infectious bronchitis virus (IBV) on layer farms in Japan. Reverse transcription PCR analysis of fecal samples revealed the presence of the IBV nucleoprotein (N) gene on approximately 30% of the farms surveyed. N-gene detection rates were higher in the Chugoku and Kyushu regions than in the remaining surveyed regions. Phylogenetic analysis of S1 gene sequences revealed that JP-I, JP-II, JP-III, and Massachusetts genotypes were particularly prevalent, with JP-I isolated throughout the country. Additionally, JP-II was the genotype detected most frequently in Chugoku, and JP-III was the most frequent in Kyushu. Unlike the previous results obtained in 1998 through 2003, the European-prevalent 4/91 genotype was no longer circulating in Japan. Moreover, the number of prefectures where multiple genotypes were detected simultaneously increased during that time.
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Affiliation(s)
- Masahiko Kaneda
- The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu City, Gifu 501-1193, Japan.,Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan.,Institute of Animal Health, National Federation of Agricultural Cooperative Associations (JA Zen-noh), 7 Ohja-machi, Sakura, Chiba 285-0043, Japan
| | - Sayaka Takahashi
- Institute of Animal Health, National Federation of Agricultural Cooperative Associations (JA Zen-noh), 7 Ohja-machi, Sakura, Chiba 285-0043, Japan.,Graduate School of Veterinary Sciences, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan
| | - Ikunori Naito
- The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu City, Gifu 501-1193, Japan.,Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan
| | - Yusuke Chiba
- The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu City, Gifu 501-1193, Japan.,Graduate School of Veterinary Sciences, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan
| | - Hirokazu Hikono
- The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu City, Gifu 501-1193, Japan.,Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan.,Graduate School of Veterinary Sciences, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan.,Food Animal Medicine and Food Safety Research Center, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan
| | - Kenji Murakami
- The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu City, Gifu 501-1193, Japan.,Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan, .,Graduate School of Veterinary Sciences, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan, .,Food Animal Medicine and Food Safety Research Center, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan,
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8
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Shchelkanov MY, Popova AY, Dedkov VG, Akimkin VG, Maleyev VV. History of investigation and current classification of coronaviruses ( Nidovirales: Coronaviridae). ACTA ACUST UNITED AC 2020. [DOI: 10.15789/2220-7619-hoi-1412] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- M. Yu. Shchelkanov
- International Scientific and Educational Center for Biological Security of Rospotrebnadzor; Federal Scientific Center of East Asia Terrestrial Biodiversity, Far Eastern Branch of RAS; Center of Hygiene and Epidemiology in the Primorsky Territory
| | - A. Yu. Popova
- Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor); Russian Medical Academy of Continuing Professional Education
| | | | - V. G. Akimkin
- Central Research Institute of Epidemiology and Microbiology of Rospotrebnadzor
| | - V. V. Maleyev
- Central Research Institute of Epidemiology and Microbiology of Rospotrebnadzor
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Gorbalenya AE, Baker SC, Baric RS, de Groot RJ, Drosten C, Gulyaeva AA, Haagmans BL, Lauber C, Leontovich AM, Neuman BW, Penzar D, Perlman S, Poon LLM, Samborskiy DV, Sidorov IA, Sola I, Ziebuhr J. The species Severe acute respiratory syndrome-related coronavirus: classifying 2019-nCoV and naming it SARS-CoV-2. Nat Microbiol 2020; 5:536-544. [PMID: 32123347 PMCID: PMC7095448 DOI: 10.1038/s41564-020-0695-z] [Citation(s) in RCA: 4390] [Impact Index Per Article: 1097.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 02/19/2020] [Indexed: 02/06/2023]
Abstract
The present outbreak of a coronavirus-associated acute respiratory disease called coronavirus disease 19 (COVID-19) is the third documented spillover of an animal coronavirus to humans in only two decades that has resulted in a major epidemic. The Coronaviridae Study Group (CSG) of the International Committee on Taxonomy of Viruses, which is responsible for developing the classification of viruses and taxon nomenclature of the family Coronaviridae, has assessed the placement of the human pathogen, tentatively named 2019-nCoV, within the Coronaviridae. Based on phylogeny, taxonomy and established practice, the CSG recognizes this virus as forming a sister clade to the prototype human and bat severe acute respiratory syndrome coronaviruses (SARS-CoVs) of the species Severe acute respiratory syndrome-related coronavirus, and designates it as SARS-CoV-2. In order to facilitate communication, the CSG proposes to use the following naming convention for individual isolates: SARS-CoV-2/host/location/isolate/date. While the full spectrum of clinical manifestations associated with SARS-CoV-2 infections in humans remains to be determined, the independent zoonotic transmission of SARS-CoV and SARS-CoV-2 highlights the need for studying viruses at the species level to complement research focused on individual pathogenic viruses of immediate significance. This will improve our understanding of virus–host interactions in an ever-changing environment and enhance our preparedness for future outbreaks.
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Al-Mubarak AIA, Al-Kubati AAG. Cocirculation of Four Infectious Bronchitis Virus Lineages in Broiler Chickens in the Eastern Region of Saudi Arabia from 2012 to 2014. Vet Med Int 2020; 2020:6037893. [PMID: 32292579 PMCID: PMC7150681 DOI: 10.1155/2020/6037893] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 11/17/2019] [Accepted: 12/11/2019] [Indexed: 11/17/2022] Open
Abstract
Avian infectious bronchitis virus (IBV) is an evolving and dynamic virus that causes major economic losses for the poultry industry worldwide. Continuous evolution and emergence of new variants of this virus are the major challenges for controlling the disease with routine vaccination. Successful vaccination usually requires the use of a homologous vaccine, which in turn necessitates continuous investigation of the circulating strains. Herein, we performed a reverse transcriptase-polymerase chain reaction- (RT-PCR-) based investigation in broiler chicken flocks of the Eastern Region of Saudi Arabia. IBV was detected in 36.5% of the tested flocks (42 out of 115) from January 2012 to March 2014. Direct sequencing of hypervariable region-3 (HVR-3) of the Spike (S)-1 gene was performed, followed by phylogenetic analysis to determine the circulating IBV genotypes. Four lineages appear to coexist in this region, including the GI-13 or 4/91 IBV (31%), GI-16 or CK/CH/LDL/97I IBV (28.6%), GI-1 or Mass IBV (19%), and GI-23 or Middle East IBV (21.4%). The latter lineage include two subgroups: IS/720/99 IBV (16.7%) and IS/Variant2/98 IBV (4.7%). Some of the detections made in the 4/91 and Mass lineages are expected to belong to the vaccine strains. Lineages without a homologous vaccine in use (CK/CH/LDL/97I and Middle East) represent 50% of the isolates recovered in this study. Based on identity with the vaccine sequences, field observations, and frequent detection, these two lineages appear to be out of coverage of the IBV vaccines used in Saudi Arabia. This is the first time to identify Middle East lineage (IS/720/99 IBV and IS/Variant2/98 IBV) in the Eastern Region of Saudi Arabia.
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Affiliation(s)
- Abdullah I. A. Al-Mubarak
- Department of Microbiology, College of Veterinary Medicine, King Faisal University, Hofuf, Saudi Arabia
| | - Anwar A. G. Al-Kubati
- Department of Botany and Microbiology, College of Sciences, King Saud University, Saudi Arabia
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11
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Tawakol MM, Nabil NM, Samy A. Evaluation of bacteriophage efficacy in reducing the impact of single and mixed infections with Escherichia coli and infectious bronchitis in chickens. Infect Ecol Epidemiol 2019; 9:1686822. [PMID: 31839902 PMCID: PMC6896464 DOI: 10.1080/20008686.2019.1686822] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Accepted: 10/23/2019] [Indexed: 12/23/2022] Open
Abstract
Infectious bronchitis virus (IBV) represents a major threat to poultry production worldwide particularly when complicated with bacterial infection. In the present study samples were collected from forty broiler farms with respiratory manifestations to characterize IBV and E. coli. Bacteriophages were isolated and enriched from sampled farms to study its efficacy to control single and mixed infections with E. coli and IBV in vivo. Twelve out of forty farms were positive for IBV. Phylogenetic analysis of partial spike protein revealed that all positive cases clustered within the GI-23 genotype. Eight out of forty farms were positive for E. coli serogroups O26, O78, O86, O114, O119, with O125 found on three farms. Bacteriophage treatment delayed the onset and reduced the severity of clinical signs, and prevented the mortality associated with single and mixed infection with IBV and E. coli. Furthermore, in mixed infections, bacteriophage treatment significantly reduced E. coli as well as IBV shedding. Groups treated with bacteriophages showed a significant reduction of E. coli shedding that gradually decreased over time, in contrast to higher and gradually increasing shedding without bacteriophage treatment. In conclusion, bacteriophage treatment significantly reduced the pathogenicity and shedding of IBVand E. coli in mixed infections.
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Affiliation(s)
- Maram M. Tawakol
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Giza, Egypt
| | - Nehal M. Nabil
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Giza, Egypt
| | - Ahmed Samy
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Giza, Egypt
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12
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Ali A, Kilany WH, Zain El-Abideen MA, Sayed ME, Elkady M. Safety and efficacy of attenuated classic and variant 2 infectious bronchitis virus candidate vaccines. Poult Sci 2018; 97:4238-4244. [PMID: 30085298 PMCID: PMC7107197 DOI: 10.3382/ps/pey312] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 06/27/2018] [Indexed: 12/24/2022] Open
Abstract
Vaccination programs against infectious bronchitis virus (IBV) in Egypt depend on both classical and/or imported variant IBV strain vaccines. However, many IBV outbreaks associated with respiratory distress, nephropathy, and high mortalities were attributed to the circulation of both classical and new nephropathogenic IBV variant 2 strains. In the present study, we report the development of attenuated IBV candidate vaccines using the classic IBV strains (IBM41 and IB2) and a nephropathogenic strain (IBvar2). The wild-type (WT) viruses were attenuated through serial passages in embryonated specific pathogen free (SPF) chicken eggs. Virulence of the attenuated viruses was then tested via the ocular route inoculation and the in vivo back passage in day-old SPF chickens. Efficacy against homologous challenge was investigated also in day-old SPF chickens. Results showed that the viruses were successfully adapted to the embryo by the 100th (IBM41 and IB2) and 110th passages (IBvar2). The attenuated viruses were safe and showed no change of virulence in day-old SPF chickens up to the 10th back passages. The efficacy experiment showed that the attenuated vaccines showed 90 to 100% protection against the homologous challenge based on ciliostasis score and protection percent. The att-IBM41 and att-IB2 vaccines were able to reduce the shedding of the challenge at 3 days post-infection (DPI) and no virus shedding was detected in both vaccinated groups by 5 DPI. In the att-IBvar2 vaccinated birds, only 20% of vaccinated birds shed the challenge virus with low titers (102.10±0.3 EID50/mL) at 3 DPI. In conclusion, the attenuated strains IBM41, IB2, and IBvar2 are efficient vaccine candidates against currently circulating classic and variant IB viruses, respectively. Further studies to evaluate the field efficacy and combining these attenuated IBV strains to induce a wider protection against heterologous IBV challenge are suggested.
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Affiliation(s)
- Ahmed Ali
- Poultry Diseases Department, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 65211, Egypt
| | - Walid H Kilany
- Reference Laboratory for Veterinary Quality Control on Poultry Production (RLQP), Animal Health Research Institute, P.O. Box 264, Dokki, Giza 12618, Egypt
| | - Mohamed A Zain El-Abideen
- Reference Laboratory for Veterinary Quality Control on Poultry Production (RLQP), Animal Health Research Institute, P.O. Box 264, Dokki, Giza 12618, Egypt
| | - Magdy El Sayed
- Department of Infectious Diseases, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt
- Middle East for Veterinary Vaccine Company, Second Industrial Area, El-Salhya El-Gededa, El-Sharkia 44671, Egypt
| | - Magdy Elkady
- Poultry Diseases Department, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 65211, Egypt
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13
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Jackwood DJ, Schat KA, Michel LO, de Wit S. A proposed nomenclature for infectious bursal disease virus isolates. Avian Pathol 2018; 47:576-584. [PMID: 30086652 DOI: 10.1080/03079457.2018.1506092] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Infectious bursal disease virus (IBDV) was initially identified in the USA. For decades, these viruses were not categorized using a typing system because they were considered to be antigenically and pathogenically similar. In the 1980s, a second major serotype, serotype 2, was found in turkeys. Classification of IBDV became more complex with the discovery of antigenic variant strains called "variants" in the United States and a highly virulent strain known as "very virulent" or vvIBDV identified in Europe. To distinguish the IBDV strains identified prior to this time from the antigenic variant viruses, the term "classic viruses" was adopted. Studies over the next three decades produced a wealth of information on the antigenicity, pathogenicity and molecular structure of IBDV isolates. These data made it clear that the descriptive nomenclature used for IBDV was inadequate. For example, not all viruses identified as vvIBDV by genotyping are highly pathogenic; some have reassorted genome segments that result in lower virulence. Furthermore, variant viruses are not an antigenically homogeneous group and the term "classic virus" has been used interchangeably to describe antigenic and pathogenic types of IBDV. These and other issues make the current naming system for strains of IBDV archaic. The lack of uniform testing and standards for antigenicity and pathogenicity makes it difficult to categorize IBDV strains on a global basis. A new nomenclature that includes a genotyping system that can easily be applied worldwide is proposed and serves as a platform to begin discussions on its value to the scientific community.
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Affiliation(s)
- Daral J Jackwood
- a Food Animal Health Research Program, Department of Veterinary Preventive Medicine, Ohio Agricultural Research and Development Center , The Ohio State University , Wooster , OH , USA
| | - Karel A Schat
- b Department of Microbiology and Immunology, College of Veterinary Medicine , Cornell University , Ithaca , NY , USA
| | - Linda O Michel
- a Food Animal Health Research Program, Department of Veterinary Preventive Medicine, Ohio Agricultural Research and Development Center , The Ohio State University , Wooster , OH , USA
| | - Sjaak de Wit
- c GD Animal Health, Department R&D , Deventer , The Netherlands
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14
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Brown PA, Courtillon C, Weerts EAWS, Andraud M, Allée C, Vendembeuche A, Amelot M, Rose N, Verheije MH, Eterradossi N. Transmission Kinetics and histopathology induced by European Turkey Coronavirus during experimental infection of specific pathogen free turkeys. Transbound Emerg Dis 2018; 66:234-242. [PMID: 30146717 PMCID: PMC7138094 DOI: 10.1111/tbed.13006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/14/2018] [Accepted: 08/18/2018] [Indexed: 12/15/2022]
Abstract
Numerous viruses, mostly in mixed infections, have been associated worldwide with poult enteritis complex (PEC). In 2008 a coronavirus (Fr‐TCoV 080385d) was isolated in France from turkey poults exhibiting clinical signs compatible with this syndrome. In the present study, the median infectious dose (ID50), transmission kinetics and pathogenicity of Fr‐TCoV were investigated in 10‐day‐old SPF turkeys. Results revealed a titre of 104.88ID50/ml with 1 ID50/ml being beyond the limit of genome detection using a well‐characterized qRT‐PCR for avian coronaviruses. Horizontal transmission of the virus via the airborne route was not observed however, via the oro‐faecal route this proved to be extremely rapid (one infectious individual infecting another every 2.5 hr) and infectious virus was excreted for at least 6 weeks in several birds. Histological examination of different zones of the intestinal tract of the Fr‐TCoV‐infected turkeys showed that the virus had a preference for the lower part of the intestinal tract with an abundance of viral antigen being present in epithelial cells of the ileum, caecum and bursa of Fabricius. Viral antigen was also detected in dendritic cells, monocytes and macrophages in these areas, which may indicate a potential for Fr‐TCoV to replicate in antigen‐presenting cells. Together these results highlight the importance of good sanitary practices in turkey farms to avoid introducing minute amounts of virus that could suffice to initiate an outbreak, and the need to consider that infected individuals may still be infectious long after a clinical episode, to avoid virus dissemination through the movements of apparently recovered birds.
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Affiliation(s)
- Paul A Brown
- VIPAC Unit, Agence Nationale de Sécurité Sanitaire (ANSES), Laboratoire de Ploufragan-Plouzané, Université Bretagne Loire, Ploufragan, France.,EPICOREM Consortium, Unité de Recherche Risques Microbiens (U2RM), Université de Caen, Caen, France
| | - Céline Courtillon
- VIPAC Unit, Agence Nationale de Sécurité Sanitaire (ANSES), Laboratoire de Ploufragan-Plouzané, Université Bretagne Loire, Ploufragan, France.,EPICOREM Consortium, Unité de Recherche Risques Microbiens (U2RM), Université de Caen, Caen, France
| | - Erik A W S Weerts
- Faculty of Veterinary Medicine, Department of Pathobiology, Utrecht University, Utrecht, Netherlands
| | - Mathieu Andraud
- EBEP Unit, Agence Nationale de Sécurité Sanitaire (ANSES), Laboratoire de Ploufragan-Plouzané, Université Bretagne Loire, Ploufragan, France
| | - Chantal Allée
- VIPAC Unit, Agence Nationale de Sécurité Sanitaire (ANSES), Laboratoire de Ploufragan-Plouzané, Université Bretagne Loire, Ploufragan, France.,EPICOREM Consortium, Unité de Recherche Risques Microbiens (U2RM), Université de Caen, Caen, France
| | - Anthony Vendembeuche
- SELEAC Unit, Agence Nationale de Sécurité Sanitaire (ANSES), Laboratoire de Ploufragan-Plouzané, Université Bretagne Loire, Ploufragan, France
| | - Michel Amelot
- SELEAC Unit, Agence Nationale de Sécurité Sanitaire (ANSES), Laboratoire de Ploufragan-Plouzané, Université Bretagne Loire, Ploufragan, France
| | - Nicolas Rose
- EBEP Unit, Agence Nationale de Sécurité Sanitaire (ANSES), Laboratoire de Ploufragan-Plouzané, Université Bretagne Loire, Ploufragan, France
| | - Monique H Verheije
- Faculty of Veterinary Medicine, Department of Pathobiology, Utrecht University, Utrecht, Netherlands
| | - Nicolas Eterradossi
- VIPAC Unit, Agence Nationale de Sécurité Sanitaire (ANSES), Laboratoire de Ploufragan-Plouzané, Université Bretagne Loire, Ploufragan, France.,EPICOREM Consortium, Unité de Recherche Risques Microbiens (U2RM), Université de Caen, Caen, France
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15
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Jiang L, Zhao W, Han Z, Chen Y, Zhao Y, Sun J, Li H, Shao Y, Liu L, Liu S. Genome characterization, antigenicity and pathogenicity of a novel infectious bronchitis virus type isolated from south China. INFECTION GENETICS AND EVOLUTION 2017; 54:437-446. [PMID: 28800976 PMCID: PMC7106192 DOI: 10.1016/j.meegid.2017.08.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 07/12/2017] [Accepted: 08/07/2017] [Indexed: 12/12/2022]
Abstract
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. Complete genomic analysis showed that GI-29 type viruses were closely related to and might originate from a GX-YL5-like virus by accumulation of substitutions in multiple genes. These GI-29 viral genomes are still evolving and diverging, particularly in the 3′ region, although we cannot rule out the possibility of recombination events occurring. For isolate γCoV/ck/China/I0114/14, we found that recombination events had occurred between nsps 2 and 3 in gene 1 which led to the introduction of a 4/91 gene fragment into the γCoV/ck/China/I0114/14 viral genome. In addition, we found that the GI-29 type γCoV/ck/China/I0111/14 isolate was a nephropathogenic strain and high pathogenic to 1-day-old specific pathogen-free (SPF) chickens although cystic oviducts were not observed in the surviving layer chickens challenged with γCoV/ck/China/I0111/14 isolate. A novel infectious bronchitis virus type, GI-29, has been identified in China. Identification of mutations scattered throughout the GI-29 genome. The GI-29 type is nephropathogenic to specific pathogen-free chickens.
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Affiliation(s)
- Lei Jiang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, People's Republic of China
| | - Wenjun Zhao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, People's Republic of China
| | - Zongxi Han
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, People's Republic of China
| | - Yuqiu Chen
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, People's Republic of China
| | - Yan Zhao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, People's Republic of China
| | - Junfeng Sun
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, People's Republic of China
| | - Huixin Li
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, People's Republic of China
| | - Yuhao Shao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, People's Republic of China
| | - Liangliang Liu
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, People's Republic of China
| | - Shengwang Liu
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, People's Republic of China.
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16
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Jordan B. Vaccination against infectious bronchitis virus: A continuous challenge. Vet Microbiol 2017; 206:137-143. [PMID: 28081857 DOI: 10.1016/j.vetmic.2017.01.002] [Citation(s) in RCA: 143] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 12/29/2016] [Accepted: 01/03/2017] [Indexed: 10/20/2022]
Abstract
Infectious bronchitis virus (IBV) is a significant respiratory pathogen of commercial poultry that causes millions of dollars in lost revenue worldwide each year. Even though the poultry industry extensively vaccinates against IBV, emergence of new serotypes and variants continually occur, making control of the disease difficult. Current mass application strategies for IBV vaccines are inefficient and frequently result in vaccination failures. Novel vaccine technology development has been slow, and is hindered by the constraints of large-scale poultry production. Further complicating the situation is the lack of knowledge of IBV protein and host cell interactions, making targeted vaccine intervention strategies near impossible. Taken together, it is easy to see why this disease remains significant in poultry production. This review outlines the current situation as it relates to IBV control, including vaccination, vaccines, and development of immunity, and recent developments in vaccine technology that may provide better protection in the future.
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Affiliation(s)
- Brian Jordan
- Department of Population Health, Poultry Diagnostic and Research Center, College of Veterinary Medicine, The University of Georgia, 953 College Station Rd., Athens, GA, 30602, USA; Department of Poultry Science, College of Agricultural and Environmental Sciences, The University of Georgia, 210 Cedar St., Athens, GA, 30602, USA.
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17
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Valastro V, Holmes EC, Britton P, Fusaro A, Jackwood MW, Cattoli G, Monne I. S1 gene-based phylogeny of infectious bronchitis virus: An attempt to harmonize virus classification. INFECTION GENETICS AND EVOLUTION 2016; 39:349-364. [PMID: 26883378 PMCID: PMC7172980 DOI: 10.1016/j.meegid.2016.02.015] [Citation(s) in RCA: 281] [Impact Index Per Article: 35.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 01/27/2016] [Accepted: 02/10/2016] [Indexed: 01/01/2023]
Abstract
Infectious bronchitis virus (IBV) is the causative agent of a highly contagious disease that results in severe economic losses to the global poultry industry. The virus exists in a wide variety of genetically distinct viral types, and both phylogenetic analysis and measures of pairwise similarity among nucleotide or amino acid sequences have been used to classify IBV strains. However, there is currently no consensus on the method by which IBV sequences should be compared, and heterogeneous genetic group designations that are inconsistent with phylogenetic history have been adopted, leading to the confusing coexistence of multiple genotyping schemes. Herein, we propose a simple and repeatable phylogeny-based classification system combined with an unambiguous and rationale lineage nomenclature for the assignment of IBV strains. By using complete nucleotide sequences of the S1 gene we determined the phylogenetic structure of IBV, which in turn allowed us to define 6 genotypes that together comprise 32 distinct viral lineages and a number of inter-lineage recombinants. Because of extensive rate variation among IBVs, we suggest that the inference of phylogenetic relationships alone represents a more appropriate criterion for sequence classification than pairwise sequence comparisons. The adoption of an internationally accepted viral nomenclature is crucial for future studies of IBV epidemiology and evolution, and the classification scheme presented here can be updated and revised novel S1 sequences should become available.
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Affiliation(s)
- Viviana Valastro
- Istituto Zooprofilattico Sperimentale delle Venezie, Padova, Italy; University of Padova, Padova, Italy.
| | - Edward C Holmes
- Marie Bashir Institute for Infectious Diseases and Biosecurity, Charles Perkins Centre, School of Life and Environmental Sciences and Sydney Medical School, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Paul Britton
- Pirbright Institute, Compton Laboratory, Compton, UK
| | - Alice Fusaro
- Istituto Zooprofilattico Sperimentale delle Venezie, Padova, Italy
| | - Mark W Jackwood
- Department of Population Health, College of Veterinary Medicine, Poultry Diagnostic and Research Center, University of Georgia, Athens, GA 30602, USA
| | - Giovanni Cattoli
- Istituto Zooprofilattico Sperimentale delle Venezie, Padova, Italy
| | - Isabella Monne
- Istituto Zooprofilattico Sperimentale delle Venezie, Padova, Italy
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18
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Jonsdottir HR, Dijkman R. Coronaviruses and the human airway: a universal system for virus-host interaction studies. Virol J 2016; 13:24. [PMID: 26852031 PMCID: PMC4744394 DOI: 10.1186/s12985-016-0479-5] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 01/27/2016] [Indexed: 02/08/2023] Open
Abstract
Human coronaviruses (HCoVs) are large RNA viruses that infect the human respiratory tract. The emergence of both Severe Acute Respiratory Syndrome and Middle East Respiratory syndrome CoVs as well as the yearly circulation of four common CoVs highlights the importance of elucidating the different mechanisms employed by these viruses to evade the host immune response, determine their tropism and identify antiviral compounds. Various animal models have been established to investigate HCoV infection, including mice and non-human primates. To establish a link between the research conducted in animal models and humans, an organotypic human airway culture system, that recapitulates the human airway epithelium, has been developed. Currently, different cell culture systems are available to recapitulate the human airways, including the Air-Liquid Interface (ALI) human airway epithelium (HAE) model. Tracheobronchial HAE cultures recapitulate the primary entry point of human respiratory viruses while the alveolar model allows for elucidation of mechanisms involved in viral infection and pathogenesis in the alveoli. These organotypic human airway cultures represent a universal platform to study respiratory virus-host interaction by offering more detailed insights compared to cell lines. Additionally, the epidemic potential of this virus family highlights the need for both vaccines and antivirals. No commercial vaccine is available but various effective antivirals have been identified, some with potential for human treatment. These morphological airway cultures are also well suited for the identification of antivirals, evaluation of compound toxicity and viral inhibition.
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Affiliation(s)
- Hulda R Jonsdottir
- Federal Department of Home Affairs, Institute of Virology and Immunology, Länggassstrasse 122, 3012, Bern, Switzerland.
- Department of Infectious diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
| | - Ronald Dijkman
- Federal Department of Home Affairs, Institute of Virology and Immunology, Länggassstrasse 122, 3012, Bern, Switzerland.
- Department of Infectious diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
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19
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Abstract
Receptor recognition by viruses is the first and essential step of viral infections of host cells. It is an important determinant of viral host range and cross-species infection and a primary target for antiviral intervention. Coronaviruses recognize a variety of host receptors, infect many hosts, and are health threats to humans and animals. The receptor-binding S1 subunit of coronavirus spike proteins contains two distinctive domains, the N-terminal domain (S1-NTD) and the C-terminal domain (S1-CTD), both of which can function as receptor-binding domains (RBDs). S1-NTDs and S1-CTDs from three major coronavirus genera recognize at least four protein receptors and three sugar receptors and demonstrate a complex receptor recognition pattern. For example, highly similar coronavirus S1-CTDs within the same genus can recognize different receptors, whereas very different coronavirus S1-CTDs from different genera can recognize the same receptor. Moreover, coronavirus S1-NTDs can recognize either protein or sugar receptors. Structural studies in the past decade have elucidated many of the puzzles associated with coronavirus-receptor interactions. This article reviews the latest knowledge on the receptor recognition mechanisms of coronaviruses and discusses how coronaviruses have evolved their complex receptor recognition pattern. It also summarizes important principles that govern receptor recognition by viruses in general.
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Affiliation(s)
- Fang Li
- Department of Pharmacology, University of Minnesota Medical School, Minneapolis, Minnesota, USA
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20
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Genome-wide association study of antibody level response to NDV and IBV in Jinghai yellow chicken based on SLAF-seq technology. J Appl Genet 2015; 56:365-73. [PMID: 25588649 DOI: 10.1007/s13353-014-0269-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 11/10/2014] [Accepted: 12/29/2014] [Indexed: 12/21/2022]
Abstract
Newcastle disease (ND) and avian infectious bronchitis (IB) are contagious diseases of chickens. To identify genes associated with antibody levels against ND and IB, a genome-wide association study was performed using specific-locus amplified fragment sequencing (SLAF-seq) technology in Jinghai yellow chickens. This determined six single-nucleotide polymorphisms (SNPs) that were associated with antibody levels against Newcastle disease virus (NDV): rsZ2494661, rsZ2494710, rs1211307701, rs1211307711, rs1218289310 and rs420701988. Of these, rsZ2494661 and rsZ2494710 reached the 5 % Bonferroni genome-wide significance level (5.5E-07) and they were both 134.7 kb downstream of the SETBP1 gene. The remaining four SNPs had 'suggestive' genome-wide significance levels (1.1E-05) and they were within or near the Plexin B1, LRRN1 and PDGFC genes. IB had two SNPs associated with antibody levels: rs149988433 and rs16170823; both reached chromosome-wide significance levels and they were near the USP7 and TRIM27 genes, respectively. Bioinformatics, GO annotation and pathway analysis indicated that five of these genes (Plexin B1, TRIM27, PDGFC, SETBP1 and USP7) may be important for the generation of protective antibodies against NDV and infectious bronchitis virus (IBV). This paves the way for further research on host immune responses against NDV.
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21
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Al-Shekaili T, Baylis M, Ganapathy K. Molecular detection of infectious bronchitis and avian metapneumoviruses in Oman backyard poultry. Res Vet Sci 2014; 99:46-52. [PMID: 25613085 PMCID: PMC7111884 DOI: 10.1016/j.rvsc.2014.12.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 12/09/2014] [Accepted: 12/26/2014] [Indexed: 11/30/2022]
Abstract
Infectious bronchitis virus (IBV) and avian metapneumovirus (aMPV) are economically important viral pathogens infecting chickens globally. Identification of endemic IBV and aMPV strains promotes better control of both diseases and prevents production losses. Orophrayngeal swab samples were taken from 2317 birds within 243 different backyard flocks in Oman. Swabs from each flock were examined by RT-PCR using part-S1 and G gene primers for IBV and aMPV respectively. Thirty-nine chicken flocks were positive for IBV. Thirty two of these were genotyped and they were closely related to 793/B, M41, D274, IS/1494/06 and IS/885/00. 793/B-like IBV was also found in one turkey and one duck flock. Five flocks were positive for aMPV subtype B. Though no disease was witnessed at the time of sampling, identified viruses including variant IBV strains, may still pose a threat for both backyard and commercial poultry in Oman.
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Affiliation(s)
- Thunai Al-Shekaili
- Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Neston, Cheshire, CH64 7TE, UK
| | - Matthew Baylis
- Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Neston, Cheshire, CH64 7TE, UK
| | - Kannan Ganapathy
- Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Neston, Cheshire, CH64 7TE, UK.
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22
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Wickramasinghe INA, van Beurden SJ, Weerts EAWS, Verheije MH. The avian coronavirus spike protein. Virus Res 2014; 194:37-48. [PMID: 25451062 PMCID: PMC7114429 DOI: 10.1016/j.virusres.2014.10.009] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 10/06/2014] [Accepted: 10/07/2014] [Indexed: 02/07/2023]
Abstract
Avian coronaviruses of the genus Gammacoronavirus are represented by infectious bronchitis virus (IBV), the coronavirus of chicken. IBV causes a highly contagious disease affecting the respiratory tract and, depending on the strain, other tissues including the reproductive and urogenital tract. The control of IBV in the field is hampered by the many different strains circulating worldwide and the limited protection across strains due to serotype diversity. This diversity is believed to be due to the amino acid variation in the S1 domain of the major viral attachment protein spike. In the last years, much effort has been undertaken to address the role of the avian coronavirus spike protein in the various steps of the virus' live cycle. Various models have successfully been developed to elucidate the contribution of the spike in binding of the virus to cells, entry of cell culture cells and organ explants, and the in vivo tropism and pathogenesis. This review will give an overview of the literature on avian coronavirus spike proteins with particular focus on our recent studies on binding of recombinant soluble spike protein to chicken tissues. With this, we aim to summarize the current understanding on the avian coronavirus spike's contribution to host and tissue predilections, pathogenesis, as well as its role in therapeutic and protective interventions.
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Affiliation(s)
- I N Ambepitiya Wickramasinghe
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584CL Utrecht, The Netherlands
| | - S J van Beurden
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584CL Utrecht, The Netherlands
| | - E A W S Weerts
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584CL Utrecht, The Netherlands
| | - M H Verheije
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584CL Utrecht, The Netherlands.
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23
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Knoetze AD, Moodley N, Abolnik C. Two genotypes of infectious bronchitis virus are responsible for serological variation in KwaZulu-Natal poultry flocks prior to 2012. ACTA ACUST UNITED AC 2014; 81:769. [PMID: 25685887 DOI: 10.4102/ojvr.v81i1.769] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 06/03/2014] [Accepted: 06/03/2014] [Indexed: 01/01/2023]
Abstract
This study describes the isolation, serotyping and genotyping of 54 infectious bronchitis virus (IBV) cases predominantly in KwaZulu-Natal and compared to several isolates from other South African provinces between 2011 and 2012 and several historic isolates. The results indicate the division of isolates into two different genotypes of IBV within the province, Massachusetts (Mass)-like and QX-like. The IBV Mass-like genotype was the most prevalent and was detected in 79% of the full spike protein S1 gene sequences. Variation up to 22.3% was detected within local Mass-type strains, supporting the hypothesis that multiple IBV serotypes may co-circulate in the same region simultaneously. Additionally, more conservation was observed amongst Mass serotypes versus QX-like serotypes, implying that vaccine use can influence the variability within the IBV population; this is deduced from the fact that the only live vaccine registered for use in South Africa at the time of the study was of Mass origin and no QX-like vaccines were available for use. This study offers the first published consolidation of IBV isolates from an area of South Africa and identifies variation within the IBV population of the broiler flock within the study area over a 2-year period.
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Affiliation(s)
- Adrian D Knoetze
- Rainbow Veterinary Laboratory, Rainbow Chicken Farms, South Africa; Department of Production Animal Studies, University of Pretoria, South Africa.
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A genome-wide association study identifies major loci affecting the immune response against infectious bronchitis virus in chicken. INFECTION GENETICS AND EVOLUTION 2013; 21:351-8. [PMID: 24333371 PMCID: PMC7106259 DOI: 10.1016/j.meegid.2013.12.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 11/06/2013] [Accepted: 12/03/2013] [Indexed: 02/07/2023]
Abstract
The genetic basis of host responses to infectious bronchitis virus is unclear. We detected 20 significant markers for the antibody response to infectious bronchitis virus in chicken. Loci on chromosomes 1 and 5 explained 12% and 13% of phenotypic variation. The host immune response cluster had 13 beta-defensin and interleukin-17F genes. Our results will contribute to the control of outbreaks of infectious bronchitis.
Coronaviruses are a hot research topic because they can cause severe diseases in humans and animals. Infectious bronchitis virus (IBV), belonging to gamma-coronaviruses, causes a highly infectious respiratory viral disease and can result in catastrophic economic losses to the poultry industry worldwide. Unfortunately, the genetic basis of the host immune responses against IBV is poorly understood. In the present study, the antibody levels against IBV post-immunization were measured by an enzyme-linked immunosorbent assay in the serum of 511 individuals from a commercial chicken (Gallus gallus) population. A genome-wide association study using 43,211 single nucleotide polymorphism markers was performed to identify the major loci affecting the immune response against IBV. This study detected 20 significant (P < 1.16 × 10−6) effect single nucleotide polymorphisms for the antibody level against IBV. These single nucleotide polymorphisms were distributed on five chicken chromosomes (GGA), involving GGA1, GGA3, GGA5, GGA8, and GGA9. The genes in the 1-Mb windows surrounding each single nucleotide polymorphism with significant effect for the antibody level against IBV were associated with many biological processes or pathways related to immunity, such as the defense response and mTOR signaling pathway. A genomic region containing a cluster of 13 beta-defensin (GAL1–13) and interleukin-17F genes on GGA3 probably plays an important role in the immune response against IBV. In addition, the major loci significantly associated with the antibody level against IBV on GGA1 and GGA5 could explain about 12% and 13% of the phenotypic variation, respectively. This study suggested that the chicken genome has several important loci affecting the immune response against IBV, and increases our knowledge of how to control outbreaks of infectious bronchitis.
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Abstract
Infectious bronchitis virus (IBV) is a gamma coronavirus that causes a highly contagious disease in chickens. The virus can affect the upper respiratory tract and the reproductive tract, and some strains can cause a nephritis. Different serotypes and genetic types of the virus have been identified worldwide and for the most part do not cross-protect. In addition, new types of the virus continue to arise due to mutations and recombination events in the viral genome, making this virus difficult to identify and extremely difficult to control. Surveillance and identification of IBV types is extremely important for control of the disease and the advancement of molecular methods have aided in this pursuit. Genetic typing of IBV, which involves reverse transcription-PCR amplification and sequence analysis of the S1 glycoprotein gene, has revolutionized diagnosis and identification of this virus by making it possible to type and compare the relatedness of a large number of virus isolates in a short period of time. The purpose of this review is to give an update on the strains of IBV currently circulating in commercial chickens worldwide and hopefully to present a clear picture of the relationship between many of these viruses. The information on IBV types presented herein is from published manuscripts, submissions to GenBank, our own unpublished data, and personal communications with scientists and diagnosticians working with IBV worldwide.
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Affiliation(s)
- Mark W Jackwood
- Department of Population Health, Poultry Diagnostic and Research Center, College of Veterinary Medicine, 953 College Station Road, University of Georgia, Athens, GA 30602, USA.
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Complete genome sequence of an infectious bronchitis virus chimera between cocirculating heterotypic strains. J Virol 2013; 86:13887-8. [PMID: 23166279 DOI: 10.1128/jvi.02722-12] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
To date, multiple serotypes and genotypes of infectious bronchitis virus (IBV) have been isolated and identified. In order to provide more information on the viral evolution of IBVs, a new virulent strain named GX-NN09032, isolated from Guangxi, China, in 2009, was sequenced, and phylogenetic and recombination analyses were conducted. Furthermore, potential recombination events associated with GX-NN09032 were found in four IBV strains, including GX-YL5, DY07, CK/CH/SD09/005, TC07-2. The present study suggested that GX-NN09032 might contribute to the emergence of modern IBV variants through recombination.
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Liu X, Shao Y, Ma H, Sun C, Zhang X, Li C, Han Z, Yan B, Kong X, Liu S. Comparative analysis of four Massachusetts type infectious bronchitis coronavirus genomes reveals a novel Massachusetts type strain and evidence of natural recombination in the genome. INFECTION GENETICS AND EVOLUTION 2012. [PMID: 23178317 PMCID: PMC7106298 DOI: 10.1016/j.meegid.2012.09.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Four Massachusetts-type (Mass-type) strains of infectious bronchitis coronavirus (IBV) were compared genetically with the pathogenic M41 and H120 vaccine strains using the complete genomic sequences. The results revealed that strains ck/CH/LNM/091017 and ck/CH/LDL/101212 were closely related to the H120 vaccine, which suggests that they might represent re-isolations of vaccine strains or variants of vaccine strains that have resulted from the accumulated point mutations after several passages in chickens. In contrast, strains ck/CH/LHLJ/07VII and ck/CH/LHLJ/100902 had a close genetic relationship with the pathogenic M41 strain. In addition, molecular markers have been identified that distinguish between field and vaccine (or vaccine-like) Mass-type viruses, which may be able to differentiate between field and vaccine strains for diagnostic purposes. Phylogenetic analysis, and pairwise comparison of full-length genomes and the nine genes, identified the occurrence of recombination events in the genome of strain CK/VH/LHLJ/07VII, which suggests that this virus originated from recombination events between M41- and H120-like strains at the switch site located at the 3' end of the nucleocapsid (N) genes. To our knowledge, this is the first time that evidence for the evolution and natural recombination under field conditions between Mass-type pathogenic and vaccinal IBV strains has been documented. These findings provide insights into the emergence and evolution of the Mass-type IB coronaviruses and may help to explain the emergence of Mass-type IBV in chicken flocks all over the world.
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Affiliation(s)
- Xiaoli Liu
- Division of Avian Infectious Diseases, National Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150001, People's Republic of China
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Cavanagh D, Mawditt K, Sharma M, Drury SE, Ainsworth HL, Britton P, Gough RE. Detection of a coronavirus from turkey poults in Europe genetically related to infectious bronchitis virus of chickens. Avian Pathol 2012; 30:355-68. [PMID: 19184921 DOI: 10.1080/03079450120066368] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Intestinal contents of 13-day-old turkey poults in Great Britain were analysed as the birds showed stunting, unevenness and lameness, with 4% mortality. At post mortem examination, the main gross features were fluid caecal and intestinal contents. Histological examination of tissues was largely unremarkable, apart from some sections that showed crypt dilation and flattened epithelia. Negative contrast electron microscopy of caecal contents revealed virus particles, which in size and morphology had the appearance of a coronavirus. RNA was extracted (turkey/UK/412/00) and used in a number of reverse transcription-polymerase chain reactions (RT-PCRs) with the oligonucleotides based on sequences derived from avian infectious bronchitis virus (IBV), a coronavirus of domestic fowl. The RT-PCRs confirmed that turkey/UK/412/00 was a coronavirus and, moreover, showed that it had the same partial gene order (S-E-M-5-N-3' untranslated region) as IBV. This gene order is unlike that of any known mammalian coronavirus, which does not have a gene analogous to the gene 5 of IBV.The gene 5 of the turkey virus had two open reading frames, 5a and 5b, as in IBV and the coronaviruses isolated from turkeys in North America. The turkey/UK/412/00 also resembled IBV, but not mammalian coronaviruses, in having three open reading frames in the gene encoding E protein (gene 3). The percentage differences between the nucleotide sequences of genes 3 and 5 and the 3' untranslated region of turkey/UK/412/00 when compared with those of IBVs were similar to the differences observed when different strains of IBV were compared with each other. No sequences unique to the turkey isolates were identified. These results demonstrate, for the first time, that a coronavirus was associated with disease in turkeys outside of North America and that it is a Group 3 coronavirus, like IBV.
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Cavanagh D. Innovation and discovery: the application of nucleic acid-based technology to avian virus detection and characterization. Avian Pathol 2012; 30:581-98. [PMID: 19184952 DOI: 10.1080/03079450120092071] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Polymerase chain reaction (PCR)-based approaches to the detection, differentiation and characterization of avian pathogens continue to be developed and refined. The PCRs, or reverse transcriptase-PCRs, may be general, designed to detect all or most variants of a pathogen, or to be serotype, genotype or pathotype specific. Progress is being made with respect to making nucleic acid approaches more suitable for use in diagnostic laboratories. Robotic workstations are now available for extraction of nucleic acid from many samples in a short time, for routine diagnosis. Following general PCR, the DNA products are commonly analyzed by restriction endonuclease mapping (restriction fragment length polymorphism), using a small number of restriction endonucleases, based on a large body of sequence data. Increasingly, however, nucleotide sequencing is being used to analyze the DNA product, in part due to the expanding use of non-radioactive sequencing methods that are safe and enable high throughout. In this review, I highlight some recent developments with many avian viruses: Newcastle disease virus; circoviruses in canary and pigeon; infectious bursal disease virus (Gumboro disease virus); avian adenoviruses, including Angara disease/infectious hydropericardium virus, haemorrhagic enteritis virus of turkeys, and egg drop syndrome virus; avian herpesviruses, including infectious laryngotracheitis virus, duck plague virus, psittacine herpesvirus (Pacheco's parrot disease virus), Marek's disease virus and herpesvirus of turkeys; avian leukosis virus (associated with lymphoid leukosis or myeloid leukosis, and egg transmission); avian pneumoviruses (turkey rhinotracheitis virus); avian coronaviruses, including infectious bronchitis virus, turkey coronavirus and pheasant coronavirus; astrovirus, in the context of poult enteritis and mortality syndrome, and avian nephritis virus; and avian encephalomyelitis virus, a picornavirus related to hepatitis A virus.
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Kuhn JH, Bao Y, Bavari S, Becker S, Bradfute S, Brister JR, Bukreyev AA, Chandran K, Davey RA, Dolnik O, Dye JM, Enterlein S, Hensley LE, Honko AN, Jahrling PB, Johnson KM, Kobinger G, Leroy EM, Lever MS, Mühlberger E, Netesov SV, Olinger GG, Palacios G, Patterson JL, Paweska JT, Pitt L, Radoshitzky SR, Saphire EO, Smither SJ, Swanepoel R, Towner JS, van der Groen G, Volchkov VE, Wahl-Jensen V, Warren TK, Weidmann M, Nichol ST. Virus nomenclature below the species level: a standardized nomenclature for natural variants of viruses assigned to the family Filoviridae. Arch Virol 2012; 158:301-11. [PMID: 23001720 PMCID: PMC3535543 DOI: 10.1007/s00705-012-1454-0] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Accepted: 07/19/2012] [Indexed: 10/29/2022]
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Xie Q, Ji J, Xie J, Chen F, Cai M, Sun B, Xue C, Ma J, Bi Y. Epidemiology and immunoprotection of nephropathogenic avian infectious bronchitis virus in southern China. Virol J 2011; 8:484. [PMID: 22032619 PMCID: PMC3212842 DOI: 10.1186/1743-422x-8-484] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Accepted: 10/27/2011] [Indexed: 11/14/2022] Open
Abstract
Background In last three years, 96 suspected poultry farms from different provinces in China were diagnosed for avian infectious bronchitis (IB) survey. Finally, 221 IBV strains were confirmed by dwarf embryo test and RT-PCR assay. By virus recovery trials, 187 of the isolates caused the birds died or distressed from nephritis, which was accordant with the clinical record. Results Based on epidemiology analysis of recent field isolates of nephropathogenic IB in vaccinated farms in China, YL6 strain were used for vaccination and evaluated by antibody titer and challenge tests. The immunoprotection test indicated that the practical application of vaccine based on the recent field strains could finely facilitate controlling the nephropathogenic IB. Conclusions Our study was aim at setting a guide for safeguard against nephropathogenic IBV-caused disease in China.
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Affiliation(s)
- Qingmei Xie
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China.
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Ji J, Xie J, Chen F, Shu D, Zuo K, Xue C, Qin J, Li H, Bi Y, Ma J, Xie Q. Phylogenetic distribution and predominant genotype of the avian infectious bronchitis virus in China during 2008-2009. Virol J 2011; 8:184. [PMID: 21510909 PMCID: PMC3094301 DOI: 10.1186/1743-422x-8-184] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Accepted: 04/22/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The nephropathogenic avian infectious bronchitis (IB) caused unprecedented economic losses to the commercial chicken industry of China in 2008-2009. To investigate the prevalence of nephropathogenic IB in China, eighty IBV isolates from different provinces during 2008-2009 were identified by dwarf embryo test and RT-PCR. RESULTS The strains were mostly isolated in winter and spring with a wide age range of IB outbreaks, from 4 to 69 days. By the virus recovery trials, 70/80 of the strains resulted in the deaths or distresses of birds from nephritis. To learn more about the molecular evolutionary characteristics of the circulating field strains, the coding region of major spike 1 (S1) protein gene of these strains was RT-PCR amplified and sequenced. Compared to the published representative strains, nucleotides and amino acids sequence analysis indicated that the S1 genes of these strains and the reference strains displayed homologies ranging from 75.1% to 99.8% and from 73.1% to 99.8% respectively. S1 protein of the major pandemic strains contained 540 or 542 amino acids with the cleavage site of HRRRR or RRFRR. Phylogenetic analysis revealed that recent field isolates of IBV in China were mostly belonged to A2-branch (QXIBV-branch) and HN08-branch, only one isolate was belonged to Gray-branch and M41-branch respectively. Most of the 80 strains showed evolutionarily distant from vaccine strains. CONCLUSIONS The results of this study suggested that nephropathogenic IBVs were mainly A2-like strains in China during 2008-2009.
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Affiliation(s)
- Jun Ji
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Jingwei Xie
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Feng Chen
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China
- Guangdong Wen's Foodstuffs Group Co. Ltd., Yunfu 527439, China
| | - Dingming Shu
- State Key Laboratory of Livestock and Poultry Breeding, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Kejing Zuo
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Chunyi Xue
- State Key Laboratory of Biocontrol, College of Life Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Jianping Qin
- Guangdong Wen's Foodstuffs Group Co. Ltd., Yunfu 527439, China
| | - Hongmei Li
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Yingzuo Bi
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Jingyun Ma
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Qingmei Xie
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China
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Gomaa MH, Yoo D, Ojkic D, Barta JR. Infection with a pathogenic turkey coronavirus isolate negatively affects growth performance and intestinal morphology of young turkey poults in Canada. Avian Pathol 2010; 38:279-86. [PMID: 19937512 DOI: 10.1080/03079450903055389] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Turkey coronavirus (TCoV) is an important viral pathogen causing diarrhoea of young turkey poults that is associated with sizeable economic losses for the turkey industry. Using a field isolate that was found to be free from turkey astrovirus and avian reovirus we were able to reproduce the clinical disease associated with TCoV. Clinical signs and weight gain of poults during experimental infections were compared with age-matched, uninfected controls. Poults infected at 2 days of age had 100% morbidity and 10% mortality, and birds infected at 28 days of age showed 75% morbidity and no mortality. Diarrhoea was consistently seen in infected poults at 2 to 3 days post infection (d.p.i.) with a duration of about 3 to 5 days. Mean body weights of birds infected at 2 or 28 days of age were significantly reduced compared with uninfected birds by 7 d.p.i. and remained significantly lower for the duration of the study. At 44 days of age, poults infected at 2 or 28 days of age weighed only 68.1% or 77.7%, respectively, compared with uninfected turkeys of the same age on the same diet, a mean difference in body weights of 683 or 477g, respectively. Infected birds had profound villus atrophy with some compensatory crypt hyperplasia at 5 to 7 d.p.i. Villus heights in the duodenum were significantly reduced at 7 d.p.i. We were able to reproduce enteric disease using only a pathogenic field isolate (MG10) of TCoV that negatively affected growth performance and intestinal morphology of young turkey poults.
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Affiliation(s)
- M H Gomaa
- Department of Virology, Faculty of Veterinary Medicine, Kafrelsheikh, Egypt
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Farsang A, Ros C, Renström LHM, Baule C, Soós T, Belák S. Molecular epizootiology of infectious bronchitis virus in Sweden indicating the involvement of a vaccine strain. Avian Pathol 2010; 31:229-36. [PMID: 12396345 PMCID: PMC7154300 DOI: 10.1080/03079450220136530] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
To improve the detection and molecular identification of infectious bronchitis virus (avian coronavirus), two reverse transcriptase-polymerase chain reaction (PCR) assays were developed. As 'diagnostic#10; PCR', a set of consensus nested primers was selected from highly conserved stretches of the nucleocapsid (N) gene. As 'phylogeny' PCR, a fragment of the spike protein gene (S1) was amplified and the PCR products were directly sequenced. To study the phylogenetic relationships of the viruses from various outbreaks, studies of molecular epizootiology were performed in Sweden, a Nordic region, where the occurrence of natural cases of the disease is relatively low and the occasional use of live vaccine(s) is well recorded and monitored. The disease appeared in the region in 1994, associated with production problems among layers of various ages. During outbreaks in 1995 and 1997, both layers and broilers were affected. To reduce losses, a live attenuated vaccine has been applied since 1997. By examining 12 cases between 1994 and 1998, molecular epizootiology revealed that, before 1997, the viruses had gene sequences very similar to strains of the Massachusetts serotype. However, comparative sequence analysis of the S1 gene revealed that the identity was not 100% to any of the strains of this serotype that we analysed. A virus related to the Dutch-type strain, D274, was also identified on one farm. Surprisingly, from 1997, the year that vaccination commenced with a live Massachusetts serotype vaccine, the majority of viruses detected had S1 sequences identical to the live Massachusetts vaccine strain. This genetic relation to the vaccine virus was also confirmed by N gene sequence analysis. The studies of molecular epizootiology reveal a strong probability that the vaccination had lead to the spread of the vaccine virus, causing various disease manifestations and a confusing epizootiological situation in the poultry population.
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Affiliation(s)
- A. Farsang
- Institute for Veterinary Medicinal Products, H-1107, Budapest, Szállás utca 8, Hungary
| | - C. Ros
- Department of Chemistry and Biochemistry, University of Bern, Freistsrasse 3, 3012 Bern and ZLB Bioplasma AG, Bern, Switzerland
| | - Lena H. M. Renström
- Department of Virology, The National Veterinary Institute, Biomedical Center, S-751 23 Uppsala, Sweden
| | - Claudia Baule
- Department of Virology, The National Veterinary Institute, Biomedical Center, S-751 23 Uppsala, Sweden
| | - T. Soós
- Institute for Veterinary Medicinal Products, H-1107, Budapest, Szállás utca 8, Hungary
| | - S. Belák
- Department of Virology, The National Veterinary Institute, Biomedical Center, S-751 23 Uppsala, Sweden
- To whom correspondence should be sent. E-mail:
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Ariyoshi R, Kawai T, Honda T, Tokiyoshi S. Classification of IBV S1 genotypes by direct reverse transcriptase-polymerase chain reaction (RT-PCR) and relationship between serotypes and genotypes of strains isolated between 1998 and 2008 in Japan. J Vet Med Sci 2010; 72:687-92. [PMID: 20093802 DOI: 10.1292/jvms.09-0130] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
In this study, we attempted to establish a simple detection method for classification of IBV S1 genotypes by direct reverse transcriptase-polymerase chain reaction (RT-PCR). Then, to evaluate the usefulness of the S1 genotype-specific RT-PCR, we examined the relationship between S1 genotypes and serotypes of IBV in Japan. Sequencing of the S1 genes of IBV and phylogenetic tree analysis were conducted. On the basis of the sequencing data of the S1 genotype samples, we determined primer sets specific for each genotype. Five vaccine strains in Japan as reference strains and 46 field isolates were classified into different genetic clusters by phylogenetic tree analysis (JP-1, JP-II, JP-III, Mass and 4/91) and were matched to the results of S1 genotype-specific RT-PCR. A cross virus-neutralizing test showed that the five vaccine strains in Japan exhibited different serotypes from each other. The concordance rate of the 46 field isolates between the S1 genotypes and serotypes was 65.2%. The present study indicates that genotype-specific RT-PCR could be a convenient and useful tool for determining IBV serotypes and could contribute to the control of IBV outbreaks in Japan.
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Affiliation(s)
- Rikako Ariyoshi
- Animal Vaccine Production Department, The Chemo-Sero-Therapeutic Research Institute, Okubo, Kumamoto.
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Li L, Xue C, Chen F, Qin J, Xie Q, Bi Y, Cao Y. Isolation and genetic analysis revealed no predominant new strains of avian infectious bronchitis virus circulating in South China during 2004-2008. Vet Microbiol 2009; 143:145-54. [PMID: 20022714 PMCID: PMC7117290 DOI: 10.1016/j.vetmic.2009.11.022] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2009] [Revised: 11/05/2009] [Accepted: 11/16/2009] [Indexed: 11/27/2022]
Abstract
Twenty-seven strains of avian infectious bronchitis virus (IBV) were isolated from dead or diseased chickens at different chicken farms in South China during 2004–2008, of which the S1 gene was sequenced. Phylogenetic analysis of the S1 gene sequences of the isolated 27 strains together with 29 strains published in Genbank revealed that all IBV strains except for one isolated and one published were clustered into six distinct genotypes I-VI. 26 isolated strains belong to genotypes I, II, and III, forming a big phylogenetic branch without new predominant strains, whereas all five vaccine strains belong to genotype V that is evolutionarily distant from genotypes I, II, and III. The study of the protease cleavage motif within the S1 protein found 12 different cleavage motifs, of which 3 motifs are shared by both isolated and published strains, 2 motifs unique to isolated strains, and 7 motifs unique to published strains, further bolstering the notion of no new predominant strains. Alignment analysis of the S1 amino acid sequences indicated that the amino acid substitutions, insertions, and deletions are polymorphic and diverse, showing no sign of predominant genetic changes among the isolated strains. Taken together, there was no predominant new strain circulating in South China during 2004–2008. Nonetheless, circulating IBV strains have been continuously evolving with genetic compositions distant from vaccine strains; this explains why there have been constant but infrequent outbreaks in commercial flocks in South China during 2004–2008. Furthermore, in order to safe guard against the sudden emergence of new predominant strains, continuing surveillance of IBV strains circulating in the field is of extreme importance.
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Affiliation(s)
- Linlin Li
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510006, PR China
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Sidorov IA, Reshetov DA, Gorbalenya AE. SNAD: Sequence Name Annotation-based Designer. BMC Bioinformatics 2009; 10:251. [PMID: 19682364 PMCID: PMC2739203 DOI: 10.1186/1471-2105-10-251] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2009] [Accepted: 08/14/2009] [Indexed: 02/05/2023] Open
Abstract
Background A growing diversity of biological data is tagged with unique identifiers (UIDs) associated with polynucleotides and proteins to ensure efficient computer-mediated data storage, maintenance, and processing. These identifiers, which are not informative for most people, are often substituted by biologically meaningful names in various presentations to facilitate utilization and dissemination of sequence-based knowledge. This substitution is commonly done manually that may be a tedious exercise prone to mistakes and omissions. Results Here we introduce SNAD (Sequence Name Annotation-based Designer) that mediates automatic conversion of sequence UIDs (associated with multiple alignment or phylogenetic tree, or supplied as plain text list) into biologically meaningful names and acronyms. This conversion is directed by precompiled or user-defined templates that exploit wealth of annotation available in cognate entries of external databases. Using examples, we demonstrate how this tool can be used to generate names for practical purposes, particularly in virology. Conclusion A tool for controllable annotation-based conversion of sequence UIDs into biologically meaningful names and acronyms has been developed and placed into service, fostering links between quality of sequence annotation, and efficiency of communication and knowledge dissemination among researchers.
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Affiliation(s)
- Igor A Sidorov
- Molecular Virology Laboratory, Department of Medical Microbiology, Center of Infectious Diseases, Leiden University Medical Center, Leiden, Netherlands.
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Gomaa MH, Yoo D, Ojkic D, Barta JR. Virus shedding and serum antibody responses during experimental turkey coronavirus infections in young turkey poults. Avian Pathol 2009; 38:181-6. [PMID: 19322719 DOI: 10.1080/03079450902751863] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The course of turkey coronavirus (TCoV) infection in young turkey poults was examined using a field isolate (TCoV-MG10) from a diarrhoeal disease outbreak on a commercial turkey farm in Ontario, Canada. Two-day-old and 28-day-old poults were inoculated orally with TCoV-MG10 to examine the effect of age on viral shedding and serum antibody responses to the virus. The presence of coronavirus particles measuring 105.8+/-21.8 nm in the cloacal contents was confirmed using transmission electron microscopy. The pattern of cloacal TCoV shedding was examined by reverse-transcription polymerase chain reaction amplification of the nucleocapsid gene fragment. TCoV serum antibody responses were assessed with two recently developed TCoV enzyme-linked immunosorbent assays that used TCoV nucleocapsid and S1 polypeptides as coating antigens. Poults were found equally susceptible to TCoV infection at 2 days of age and at 4 weeks of age, and turkeys of either age shed virus in their faeces starting as early as 1 day post-inoculation and up to 17 days post-inoculation. Poults infected at 2 days of age were immunologically protected against subsequent challenge at 20 days post-inoculation. The protection was associated with measurable serum antibody responses to both the nucleocapsid and S1 structural proteins of TCoV that were detectable as early as 1 week post-infection.
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Affiliation(s)
- M H Gomaa
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
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Villarreal LYB, Brandão PE, Chacón JL, Assayag MS, Maiorka PC, Raffi P, Saidenberg ABS, Jones RC, Ferreira AJP. Orchitis in Roosters with Reduced Fertility Associated with Avian Infectious Bronchitis Virus and Avian Metapneumovirus Infections. Avian Dis 2007; 51:900-4. [DOI: 10.1637/7815-121306-regr4.1] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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40
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Chen HY, Guo AZ, Peng B, Zhang MF, Guo HY, Chen HC. Infection of HeLa cells by avian infectious bronchitis virus is dependent on cell status. Avian Pathol 2007; 36:269-74. [PMID: 17620171 DOI: 10.1080/03079450701447291] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
To investigate the adaptation of avian infectious bronchitis virus (IBV) in a human cell line may be beneficial to understanding the potential mechanisms of coronavirus interspecies infection. The current study addressed the poor replication of IBV in the HeLa human cell line demonstrated in previous reports. We showed that IBV strains M41, H52, H120 and Gray could be propagated in HeLa cells with distinct cytopathic effect. The virus titre in freshly dispersed HeLa cells was 1000-fold higher than in cell monolayers. Trypsin was not the determinant for the viral replication, suggesting that the restriction of IBV replication in HeLa cells is the result of intracellular events rather than the binding to or fusion with host cells. These IBV strains replicated to an average titre of 10(3.4+/-0.2)/0.1 ml median tissue culture infectious doses in freshly dispersed HeLa cells and maintained this titre for the first 12 passages. Then an approximately 10-fold increase (10(4.20+/-0.19)/0.1 ml) occurred in passage 13, which was maintained to passage 16, after which there was another, bigger rise to 10(6.6+/-0.3)/0.1 ml in passage 17. This titre was maintained until passage 24 when the experiment was terminated. The IBV M41 S1 gene was amplified and sequenced for passages 0, 5 and 21. There was only one amino acid replacement in the S1 protein, in passage 21. The presence of sialic acid on HeLa cells contributed to efficient virus replication, while human aminopeptidase N was not involved in the infection. Haemagglutinin activity gradually reduced with increased passages. These results indicated that the virus adaptation would probably be determined by host cell modification such as receptor glycosylation and different receptor utilization instead of viral gene mutation.
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Affiliation(s)
- H Y Chen
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, People's Republic of China
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41
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Circella E, Camarda A, Martella V, Bruni G, Lavazza A, Buonavoglia C. Coronavirus associated with an enteric syndrome on a quail farm. Avian Pathol 2007; 36:251-8. [PMID: 17497340 DOI: 10.1080/03079450701344738] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
An enteric syndrome was observed in quail (Coturnix coturnix) semi-intensively reared for restocking in Apulia (southern Italy). The birds showed depression, severe diarrhoea, dehydration and reduced growth. Mortality occurred particularly in young birds. At necropsy the prominent lesion was enteritis. A coronavirus was detected by electron microscopy and reverse transcriptase-polymerase chain reaction in the faeces and in the intestinal content of the dead quails. The virus could not be cultivated in chicken embryos. By sequence analyses of a fragment (409 nucleotides) of region 1b of the polymerase gene, the quail coronavirus displayed <or=93% nucleotide identity to avian coronaviruses (group 3 coronaviruses)--whereas by analysis of the S1 portion of the spike protein-encoding gene, the quail coronavirus displayed 16% to 18% amino acid identity with infectious bronchitis virus, and 79% to 81% identity with turkey coronavirus. Altogether, the findings suggest the existence of a novel coronavirus genetically related to turkey coronavirus.
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Affiliation(s)
- Elena Circella
- Dipartimento di Sanità e Benessere degli Animali, Università degli Studi di Bari, S.P. Casamassima Km 3, Facoltà di Medicina Veterinaria, Valenzano, Bari, Italy.
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42
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Cavanagh D. Coronavirus avian infectious bronchitis virus. Vet Res 2007; 38:281-97. [PMID: 17296157 DOI: 10.1051/vetres:2006055] [Citation(s) in RCA: 654] [Impact Index Per Article: 38.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2006] [Accepted: 09/22/2006] [Indexed: 01/05/2023] Open
Abstract
Infectious bronchitis virus (IBV), the coronavirus of the chicken (Gallus gallus), is one of the foremost causes of economic loss within the poultry industry, affecting the performance of both meat-type and egg-laying birds. The virus replicates not only in the epithelium of upper and lower respiratory tract tissues, but also in many tissues along the alimentary tract and elsewhere e.g. kidney, oviduct and testes. It can be detected in both respiratory and faecal material. There is increasing evidence that IBV can infect species of bird other than the chicken. Interestingly breeds of chicken vary with respect to the severity of infection with IBV, which may be related to the immune response. Probably the major reason for the high profile of IBV is the existence of a very large number of serotypes. Both live and inactivated IB vaccines are used extensively, the latter requiring priming by the former. Their effectiveness is diminished by poor cross-protection. The nature of the protective immune response to IBV is poorly understood. What is known is that the surface spike protein, indeed the amino-terminal S1 half, is sufficient to induce good protective immunity. There is increasing evidence that only a few amino acid differences amongst S proteins are sufficient to have a detrimental impact on cross-protection. Experimental vector IB vaccines and genetically manipulated IBVs--with heterologous spike protein genes--have produced promising results, including in the context of in ovo vaccination.
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Affiliation(s)
- Dave Cavanagh
- Institute for Animal Health, Compton Laboratory, Compton, Newbury, Berkshire RG20 7NN, United Kingdom.
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Perlman S, Holmes KV. Genes 3 and 5 of infectious bronchitis virus are accessory protein genes. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2006; 581:363-8. [PMID: 17037560 PMCID: PMC7123576 DOI: 10.1007/978-0-387-33012-9_64] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Affiliation(s)
- Stanley Perlman
- Department of Pediatrics, University of Iowa, 52242 Iowa City, IA USA
| | - Kathryn V. Holmes
- Department of Microbiology, University of Colorado Health Sciences Center at Fitzsimons, 80045-8333 Aurora, CO USA
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Dolz R, Pujols J, Ordóñez G, Porta R, Majó N. Antigenic and molecular characterization of isolates of the Italy 02 infectious bronchitis virus genotype. Avian Pathol 2006; 35:77-85. [PMID: 16595297 DOI: 10.1080/03079450600597295] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
As part of an epidemiological surveillance of infectious bronchitis virus (IBV) in Spain, four Spanish field isolates showed high S1 spike sequence similarities with an IBV sequence from the GenBank database named Italy 02. Given that little was known about this new emergent IBV strain we have characterized the four isolates by sequencing the entire S1 part of the spike protein gene and have compared them with many reference IBV serotypes. In addition, cross-virus neutralization assays were conducted with the main IBV serotypes present in Europe. The four Spanish field strains and the Italy 02 S1 sequence from the NCBI database were established as a new genotype that showed maximum amino acid identities with the 4/91 serotype (81.7% to 83.7%), the D274 group that included D207, D274 and D3896 strains (79.8% to 81.7%), and the B1648 serotype (79.3% to 80%). Furthermore, on the basis of these results, it was demonstrated that the Italy 02 genotype had been circulating in Spain since as early as 1997. Based on the average ratio of synonymous:non-synonymous (dS/dN) amino acid substitutions within Italy 02 sequences, no positive selection pressures were related with changes observed in the S1 gene. Moreover, phylogenetic analysis of the S1 gene suggested that the Italy 02 genotype has undergone a recombination event. Virus neutralization assays demonstrated that little antigenic relatedness (less than 35%) exists between Italy 02 and some of the reference IBV serotypes, and indicated that Italy 02 is likely to be a new serotype.
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Affiliation(s)
- Roser Dolz
- Centre de Recerca en Sanitat Animal (CReSA), 43206 Reus, Tarragona, Spain.
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45
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Ignjatovic J, Gould G, Sapats S. Isolation of a variant infectious bronchitis virus in Australia that further illustrates diversity among emerging strains. Arch Virol 2006; 151:1567-85. [PMID: 16501892 PMCID: PMC7087298 DOI: 10.1007/s00705-006-0726-y] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2005] [Accepted: 01/05/2006] [Indexed: 01/15/2023]
Abstract
Australian infectious bronchitis viruses (IBV) have undergone a separate evolution due to geographic isolation. Consequently, changes occurring in Australian IBV illustrate, independently from other countries, types of variability that could occur in emerging IBV strains. Previously, we have identified two distinct genetic groups of IBV, designated subgroups 1 and 2. IBV strains of subgroup 1 have S1 and N proteins that share a high degree of amino acid identity, 81 to 98% in S1 and 91 to 99% in N. Subgroup 2 strains possess S1 and N proteins that share a low level of identity with subgroup 1 strains: 54 to 62% in S1 and 60 to 62% in N. This paper describes the isolation and characterisation of a third, previously undetected genetic group of IBV in Australia. The subgroup 3 strains, represented by isolate chicken/Australia/N2/04, had an S1 protein that shared a low level of identity with both subgroups 1 and 2: 61 to 63% and 56 to 59%, respectively. However, the N protein and the 3′ untranslated region were similar to subgroup 1: 90 to 97% identical with the N protein of subgroup 1 strains. This N4/02 subgroup 3 of IBV is reminiscent of two other strains, D1466 and DE072, isolated in the Netherlands and in the USA, respectively. The emergence of the subgroup 3 viruses in Australia, as well as the emergence of subgroup 2 in 1988, could not be explained by any of the mechanisms that are currently considered to be involved in generation of IBV variants.
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Affiliation(s)
- J Ignjatovic
- CSIRO Livestock Industries, Australian Animal Health Laboratory, Geelong, Australia.
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46
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Abstract
The number of avian species in which coronaviruses have been detected has doubled in the past couple of years. While the coronaviruses in these species have all been in coronavirus Group 3, as for the better known coronaviruses of the domestic fowl (infectious bronchitis virus [IBV], in Gallus gallus), turkey (Meleagris gallopavo) and pheasant (Phasianus colchicus), there is experimental evidence to suggest that birds are not limited to infection with Group 3 coronaviruses. In China coronaviruses have been isolated from peafowl (Pavo), guinea fowl (Numida meleagris; also isolated in Brazil), partridge (Alectoris) and also from a non-gallinaceous bird, the teal (Anas), all of which were being reared in the vicinity of domestic fowl. These viruses were closely related in genome organization and in gene sequences to IBV. Indeed, gene sequencing and experimental infection of chickens indicated that the peafowl isolate was the H120 IB vaccine strain, while the teal isolate was possibly a field strain of a nephropathogenic IBV. Thus the host range of IBV does extend beyond the chicken. Most recently, Group 3 coronaviruses have been detected in greylag goose (Anser anser), mallard duck (Anas platyrhynchos) and pigeon (Columbia livia). It is clear from the partial genome sequencing of these viruses that they are not IBV, as they have two additional small genes near the 3' end of the genome. Twenty years ago a coronavirus was isolated after inoculation of mice with tissue from the coastal shearwater (Puffinus puffinus). While it is not certain whether the virus was actually from the shearwater or from the mice, recent experiments have shown that bovine coronavirus (a Group 2 coronavirus) can infect and also cause enteric disease in turkeys. Experiments with some Group 1 coronaviruses (all from mammals, to date) have shown that they are not limited to replicating or causing disease in a single host. SARS-coronavirus has a wide host range. Clearly there is the potential for the emergence of new coronavirus diseases in domestic birds, from both avian and mammalian sources. Modest sequence conservation within gene 1 has enabled the design of oligonucleotide primers for use in diagnostic reverse transcriptase-polymerase chain reactions, which will be useful for the detection of new coronaviruses.
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Affiliation(s)
- Dave Cavanagh
- Institute for Animal Health, Compton Laboratory, Compton, Newbury, Berkshire, RG20 7NN, UK.
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Casais R, Davies M, Cavanagh D, Britton P. Gene 5 of the avian coronavirus infectious bronchitis virus is not essential for replication. J Virol 2005; 79:8065-78. [PMID: 15956552 PMCID: PMC1143771 DOI: 10.1128/jvi.79.13.8065-8078.2005] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2004] [Accepted: 03/16/2005] [Indexed: 11/20/2022] Open
Abstract
The avian coronavirus Infectious bronchitis virus (IBV), like other coronaviruses, expresses several small nonstructural (ns) proteins in addition to those from gene 1 (replicase) and the structural proteins. These coronavirus ns genes differ both in number and in amino acid similarity between the coronavirus groups but show some concordance within a group or subgroup. The functions and requirements of the small ns gene products remain to be elucidated. With the advent of reverse genetics for coronaviruses, the first steps in elucidating their role can be investigated. We have used our reverse genetics system for IBV (R. Casais, V. Thiel, S. G. Siddell, D. Cavanagh, and P. Britton, J. Virol. 75:12359-12369, 2001) to investigate the requirement of IBV gene 5 for replication in vivo, in ovo, and ex vivo. We produced a series of recombinant viruses, with an isogenic background, in which complete expression of gene 5 products was prevented by the inactivation of gene 5 following scrambling of the transcription-associated sequence, thereby preventing the expression of IBV subgenomic mRNA 5, or scrambling either separately or together of the translation initiation codons for the two gene 5 products. As all of the recombinant viruses replicated very similarly to the wild-type virus, Beau-R, we conclude that the IBV gene 5 products are not essential for IBV replication per se and that they are accessory proteins.
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Affiliation(s)
- Rosa Casais
- Division of Molecular Biology, Institute for Animal Health, Compton Laboratory, Compton, Newbury, Berkshire, RG20 7NN, United Kingdom
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Cavanagh D, Picault JP, Gough R, Hess M, Mawditt K, Britton P. Variation in the spike protein of the 793/B type of infectious bronchitis virus, in the field and during alternate passage in chickens and embryonated eggs. Avian Pathol 2005; 34:20-5. [PMID: 15763735 DOI: 10.1080/03079450400025414] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The degree of variation exhibited within the 793/B serotype (also known as 4/91 and CR88 serotypes) was investigated with nine French and 10 British isolates, collected between 1985 and 1994. The S1 part (1644 nucleotides) of the spike protein gene of the first known isolate of this serotype, FR/CR85131/85, had 95.9% to 97% nucleotide identity with the other isolates. Partial sequencing of isolates from Iran and Saudi Arabia, isolated in 2000, revealed approximately 95% nucleotide identity with European isolates, including the two live 793/B vaccinal strains, showing that they were not re-isolations of vaccinal virus. The data indicates that strains within the 793/B serotype have > or =96% nucleotide identity within the whole S1 gene and > or =93% nucleotide identity within the first 560 nucleotides, and > or =92% and > or =86% amino acid identities in the corresponding protein regions. This is similar to the identities exhibited within the Massachusetts serotype. Sequence analysis of a 793/B field isolate after passage in embryonated eggs, then in chickens and then again in eggs revealed selection for a serine and alanine at S1 amino acid position 95 in chicken-passaged and egg-passaged virus, respectively. There was no change in pathogenicity. This is the first demonstration at gene sequence level of host-driven selection for infectious bronchitis virus.
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Affiliation(s)
- David Cavanagh
- Institute for Animal Health, Compton Laboratory, Compton, Newbury, RG20 7NN, UK.
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Britton P, Evans S, Dove B, Davies M, Casais R, Cavanagh D. Generation of a recombinant avian coronavirus infectious bronchitis virus using transient dominant selection. J Virol Methods 2005; 123:203-11. [PMID: 15620403 PMCID: PMC7112893 DOI: 10.1016/j.jviromet.2004.09.017] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2004] [Revised: 09/22/2004] [Accepted: 09/29/2004] [Indexed: 02/08/2023]
Abstract
A reverse genetics system for the avian coronavirus infectious bronchitis virus (IBV) has been described in which a full-length cDNA, corresponding to the IBV (Beaudette-CK) genome, was inserted into the vaccinia virus genome following in vitro assembly of three contiguous cDNAs [Casais, R., Thiel, V., Siddell, S.G., Cavanagh, D., Britton, P., 2001. Reverse genetics system for the avian coronavirus infectious bronchitis virus. J. Virol. 75, 12359-12369]. The method has subsequently been used to generate a recombinant IBV expressing a chimaeric S gene [Casais, R., Dove, B., Cavanagh, D., Britton, P., 2003. Recombinant avian infectious bronchitis virus expressing a heterologous spike gene demonstrates that the spike protein is a determinant of cell tropism. J. Virol. 77, 9084-9089]. Use of vaccinia virus as a vector for the full-length cDNA of the IBV genome has the advantage that modifications can be made to the IBV cDNA using homologous recombination, a method frequently used to insert and delete sequences from the vaccinia virus genome. We describe the use of homologous recombination as a method for modifying the Beaudette full-length cDNA, within the vaccinia virus genome, without the requirement for in vitro assembly of the IBV cDNA. To demonstrate the feasibility of the method we exchanged the ectodomain of the Beaudette spike gene for the corresponding region from IBV M41 and generated two recombinant infectious bronchitis viruses (rIBVs) expressing the chimaeric S protein, validating the method as an alternative way for generating rIBVs.
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Affiliation(s)
- Paul Britton
- Division of Molecular Biology, Institute for Animal Health, Compton Laboratory, Compton, Newbury, Berkshire RG20 7NN, UK.
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Dove B, Cavanagh D, Britton P. Presence of an encephalomyocarditis virus internal ribosome entry site sequence in avian infectious bronchitis virus defective RNAs abolishes rescue by helper virus. J Virol 2004; 78:2711-21. [PMID: 14990691 PMCID: PMC353753 DOI: 10.1128/jvi.78.6.2711-2721.2004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2003] [Accepted: 11/18/2003] [Indexed: 11/20/2022] Open
Abstract
Avian infectious bronchitis virus (IBV) defective RNAs (D-RNAs) have been used for the expression of heterologous genes in a helper-virus-dependent expression system. The heterologous genes were expressed under the control of an IBV transcription-associated sequence (TAS) derived from gene 5 of IBV Beaudette. However, coronavirus D-RNA expression vectors display an inherent instability following serial passage with helper virus, resulting in the eventual loss of the heterologous genes. The use of the picornavirus encephalomyocarditis virus (EMCV) internal ribosome entry site (IRES) sequence to initiate gene translation was investigated as an alternative method to the coronavirus-mediated TAS-controlled heterologous gene expression system. IBV D-RNAs containing the chloramphenicol acetyltransferase (CAT) reporter gene, under EMCV IRES control, were assessed for IRES-mediated CAT protein translation. CAT protein was detected from T7-derived IBV D-RNA transcripts in a cell-free protein synthesis system and in situ in avian chick kidney (CK) cells following T7-derived D-RNA synthesis from a recombinant fowlpox virus expressing the bacteriophage T7 DNA-dependent RNA polymerase. However, CAT protein was not detected in CK cells from IRES-containing IBV D-RNAs, in which the IRES-CAT construct was inserted at two different positions within the D-RNA, in the presence of helper IBV. Northern blot analysis demonstrated that the IRES-containing D-RNAs were not rescued on serial passage with helper virus, indicating that the EMCV IRES sequence had a detrimental effect on IBV D-RNA rescue.
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Affiliation(s)
- Brian Dove
- Division of Molecular Biology, Institute for Animal Health, Compton Laboratory, Compton, Newbury, Berkshire RG20 7NN, United Kingdom
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