Recent advances in avian virology

Cavanagh, David

doi:10.1016/0007-1935(92)90045-3

Cited by 13 publications

(7 citation statements)

References 141 publications

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“…In this study, based on the SimPlot analysis, which was confirmed by the pairwise nucleotide identity comparison and phylogenetic analysis of different corresponding gene fragments, our results provide convincing evidence that recombination events occurred during the origin and evolution of the IBV isolate ck/CH/ LHLJ/140906. Recombination between IBVs and its role in the emergence of new IBV variants have been reported previously (Cavanagh, 1992;Jia et al, 1995;Lee and Jackwood, 2000) and may occur at multiple sites (Jia et al, 1995;Lee and Jackwood, 2000). This is the case in the genome for IBV isolate ck/CH/LHLJ/ 140906, in which template switches may be occurred between H120-and 4/91-like viruses.…”

Section: Discussionmentioning

confidence: 94%

“…New serotypes and genotypes of IBV emerge frequently in different parts of the world (Al Tarcha et al, 1990;Cook, 1983;Gelb et al, 1991;Gough et al, 1992;Jia et al, 1995;Liu and Kong, 2004;Zanella et al, 2003). A number of factors, among which mutation and recombination are two major forces, account for the emergence and evolution of new genetic variants, and they play an important role in increasing the number of variants (Cavanagh, 1992;Estevez et al, 2003;Jia et al, 1995;Kusters et al, 1990;Wang et al, 1993). Although mutations are very common in IBV genomes, recombination between strains has also been widely reported (Davidson and Silva, 2008;Hewson et al, 2014;Jia et al, 1995;Kusters et al, 1990).…”

Section: Introductionmentioning

confidence: 99%

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Serotype shift of a 793/B genotype infectious bronchitis coronavirus by natural recombination

Zhang

Han

et al. 2015

Infection, Genetics and Evolution

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An infectious bronchitis coronavirus, designated as ck/CH/LHLJ/140906, was isolated from an infectious bronchitis virus (IBV) strain H120-vaccinated chicken flock, which presented with a suspected infectious bronchitis virus (IBV) infection. A phylogenetic analysis based on the S1 gene clustered ck/CH/LHLJ/140906 with the 793/B group; however, a pairwise comparison showed that the 5' terminal of the S1 gene (containing hypervariable regions I and II) had high sequence identity with the H120 strain, while the 3' terminal sequence was very similar to that of IBV 4/91 strain. A SimPlot analysis of the complete genomic sequence, which was confirmed by a phylogenetic analysis and nucleotide similarities using the corresponding gene fragments, suggested that isolate ck/CH/LHLJ/140906 emerged from multiple recombination events between parental IBV strains 4/91 and H120. Although the isolate ck/CH/LHLJ/140906 had slightly higher S1 amino acid sequence identity to strain 4/91 (88.2%) than to strain H120 (86%), the serotype of the virus was more closely related to that of the H120 strain (32% antigenic relatedness) than to the 4/91 strain (15% antigenic relatedness). Whereas, vaccination of specific pathogen-free chickens with the 4/91 vaccine provided better protection against challenge with ck/CH/LHLJ/140906 than did vaccination with the H120 strain according to the result of virus re-isolation. As the spike protein, especially in the hypervariable regions of the S1 domain, of IBVs contains viral neutralizing epitopes, the results of this study showed that recombination of the S1 domain resulted in the emergence of a new serotype.

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Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Serotype shift of a 793/B genotype infectious bronchitis coronavirus by natural recombination

Zhang

Han

et al. 2015

Infection, Genetics and Evolution

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“…subsequently in Europe in 1985. The virus can also replicate in the domestic fowl and other species (for references see Cavanagh, 1992;Naylor and Jones, 1993). The morphology of the virus particle viewed in the electron microscope, together with the number and mobility of the virus proteins and mRNA species on gels suggested that this was the only example of an avian pneumovirus (APV) described to date (Cavanagh and Barrett, 1988;Collins and Gough, 1988;Ling and Pringle, 1988).…”

Section: Introductionmentioning

confidence: 99%

Sequence and in vitro expression of the phosphoprotein gene of avian pneumovirus

Ling

Davis

et al. 1995

Virus Research

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The phosphoprotein (P) gene of two subgroup A strains of avian pneumovirus comprised 855 nucleotides containing only one substantial open reading frame encoding a protein of 278 amino acids, with a predicted M(r) of 30,323. In vitro translation of P mRNA in a wheat germ system resulted in the synthesis of two polypeptides of M(r) 35,000. Comparison of the deduced P protein sequence with that of the known mammalian pneumoviruses revealed overall amino acid identities ranging from 31 to 34.5%, suggesting a distant relationship. However, there was a much higher identity (63.2-68.4%) in a region of 57 residues, which included a heptad repeat sequence.

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“…There is no evidence that the MAstVs cross species line (Matsui & Greenberg, 2001). However, based on surveillance studies of chicken and turkey farms, antibodies against ANV were isolated from both chickens and turkeys, suggesting that either support ANV replication (Nicholas et al, 1988;Cavanagh, 1992). Having greater genetic flexibility may increase the likelihood of replicating in whatever poultry species is available, so long as the overall functional motif is conserved (Schneider & Roossinck, 2001).…”

Section: Non-structural Proteinsmentioning

confidence: 99%

“…As an increasing number of 'small round viruses' (SRVs) are implicated in decreased production and increased mortality, it is crucial that they be characterized to completely understand distribution and design effective control mechanisms (Asplin, 1965b;Gough et al, 1984;Reynolds et al, 1987a,b;Johnson, 1990;Saif et al, 1990;Swayne et al, 1990;Guy & Barnes, 1991;Cavanagh, 1992;Qureshi et al, 1997Qureshi et al, , 2000Imada et al, 2000;Koci et al, 2000b;Schultz-Cherry et al, 2000;Todd, 2000;Yu et al, 2000a,b;Cavanagh, 2001;Todd et al, 2001). SRVs typically fall into one of five viral families, Parvoviridae, Circoviridae, Picornaviridae, Calciviridae, and Astroviridae , each with characteristic morphologies visible by electron microscopy (Caul & Appleton, 1982).…”

Section: Introductionmentioning

confidence: 99%

Avian astroviruses

Koci¹,

2002

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As poultry becomes more important in the world economy, it is increasingly important to fully understand the mechanisms of disease and poor production that affect the industry. To more accurately and reasonably treat these diseases, a more sophisticated understanding of interrelatedness is required. This review focuses on avian astroviruses (AAstVs), in particular the recent advances in our understanding of AAstV molecular biology, and also history, diagnosis, treatment and control. The known AastVs comprise duck astrovirus 1, turkey astrovirus 1 and 2, and avian nephritis virus of chickens. Nucleotide and amino acid identities between the avian and mammalian (human, ovine, bovine) astroviruses is very low (e.g. 20 to 25% and 12 to 15%, respectively) in open reading frame (ORF) 1a. There is also variation among the avian astroviruses, including between the two known types of turkey astrovirus. The ORF 1b sequence contains a number of conserved amino acid motifs; these could be the basis of degnerate oligonucleotide primers. A nomenclature for astroviruses is also proposed, based on: host species-astrovirus-type number/country(state)/reference number/year of isolation. For example, turkey astrovirus 2/North Carolina/034/1999.

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Recent advances in avian virology

Abstract: Selected, recent research on the following avian diseases, and their causative viruses, has been reviewed: chicken anaemia, infectious bursal disease, turkey rhinotracheitis, avian nephritis, fowlpox, influenza, infectious bronchitis and turkey enteritis.

Cited by 13 publications

References 141 publications

Serotype shift of a 793/B genotype infectious bronchitis coronavirus by natural recombination

Serotype shift of a 793/B genotype infectious bronchitis coronavirus by natural recombination

Sequence and in vitro expression of the phosphoprotein gene of avian pneumovirus

Avian astroviruses

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