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Genomic recombination between infectious laryngotracheitis vaccine strains occurs under a broad range of infection conditions in vitro and in ovo

Gallid alphaherpesvirus 1 causes infectious laryngotracheitis (ILT) in farmed poultry worldwide. Intertypic recombination between vaccine strains of this virus has generated novel and virulent isolates in field conditions. In this study, in vitro and in ovo systems were co-infected and superinfected...

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Autores principales: Fakhri, Omid, Devlin, Joanne M., Browning, Glenn F., Vaz, Paola K., Thilakarathne, Dulari, Lee, Sang-Won, Hartley, Carol A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7051062/
https://www.ncbi.nlm.nih.gov/pubmed/32119681
http://dx.doi.org/10.1371/journal.pone.0229082
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author Fakhri, Omid
Devlin, Joanne M.
Browning, Glenn F.
Vaz, Paola K.
Thilakarathne, Dulari
Lee, Sang-Won
Hartley, Carol A.
author_facet Fakhri, Omid
Devlin, Joanne M.
Browning, Glenn F.
Vaz, Paola K.
Thilakarathne, Dulari
Lee, Sang-Won
Hartley, Carol A.
author_sort Fakhri, Omid
collection PubMed
description Gallid alphaherpesvirus 1 causes infectious laryngotracheitis (ILT) in farmed poultry worldwide. Intertypic recombination between vaccine strains of this virus has generated novel and virulent isolates in field conditions. In this study, in vitro and in ovo systems were co-infected and superinfected under different conditions with two genomically distinct and commonly used ILTV vaccines. The progeny virus populations were examined for the frequency and pattern of recombination events using multi-locus high-resolution melting curve analysis of polymerase chain reaction products. A varied level of recombination (0 to 58.9%) was detected, depending on the infection system (in ovo or in vitro), viral load, the composition of the inoculum mixture, and the timing and order of infection. Full genome analysis of selected recombinants with different in vitro phenotypes identified alterations in coding and non-coding regions. The ability of ILTV vaccines to maintain their capacity to recombine under such varied conditions highlights the significance of recombination in the evolution of this virus and demonstrates the capacity of ILTV vaccines to play a role in the emergence of recombinant viruses.
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spelling pubmed-70510622020-03-12 Genomic recombination between infectious laryngotracheitis vaccine strains occurs under a broad range of infection conditions in vitro and in ovo Fakhri, Omid Devlin, Joanne M. Browning, Glenn F. Vaz, Paola K. Thilakarathne, Dulari Lee, Sang-Won Hartley, Carol A. PLoS One Research Article Gallid alphaherpesvirus 1 causes infectious laryngotracheitis (ILT) in farmed poultry worldwide. Intertypic recombination between vaccine strains of this virus has generated novel and virulent isolates in field conditions. In this study, in vitro and in ovo systems were co-infected and superinfected under different conditions with two genomically distinct and commonly used ILTV vaccines. The progeny virus populations were examined for the frequency and pattern of recombination events using multi-locus high-resolution melting curve analysis of polymerase chain reaction products. A varied level of recombination (0 to 58.9%) was detected, depending on the infection system (in ovo or in vitro), viral load, the composition of the inoculum mixture, and the timing and order of infection. Full genome analysis of selected recombinants with different in vitro phenotypes identified alterations in coding and non-coding regions. The ability of ILTV vaccines to maintain their capacity to recombine under such varied conditions highlights the significance of recombination in the evolution of this virus and demonstrates the capacity of ILTV vaccines to play a role in the emergence of recombinant viruses. Public Library of Science 2020-03-02 /pmc/articles/PMC7051062/ /pubmed/32119681 http://dx.doi.org/10.1371/journal.pone.0229082 Text en © 2020 Fakhri et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Fakhri, Omid
Devlin, Joanne M.
Browning, Glenn F.
Vaz, Paola K.
Thilakarathne, Dulari
Lee, Sang-Won
Hartley, Carol A.
Genomic recombination between infectious laryngotracheitis vaccine strains occurs under a broad range of infection conditions in vitro and in ovo
title Genomic recombination between infectious laryngotracheitis vaccine strains occurs under a broad range of infection conditions in vitro and in ovo
title_full Genomic recombination between infectious laryngotracheitis vaccine strains occurs under a broad range of infection conditions in vitro and in ovo
title_fullStr Genomic recombination between infectious laryngotracheitis vaccine strains occurs under a broad range of infection conditions in vitro and in ovo
title_full_unstemmed Genomic recombination between infectious laryngotracheitis vaccine strains occurs under a broad range of infection conditions in vitro and in ovo
title_short Genomic recombination between infectious laryngotracheitis vaccine strains occurs under a broad range of infection conditions in vitro and in ovo
title_sort genomic recombination between infectious laryngotracheitis vaccine strains occurs under a broad range of infection conditions in vitro and in ovo
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7051062/
https://www.ncbi.nlm.nih.gov/pubmed/32119681
http://dx.doi.org/10.1371/journal.pone.0229082
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