Cargando…
Novel encephalomyelitis-associated astrovirus in a muskox (Ovibos moschatus): a surprise from the archives
BACKGROUND: The small, single-stranded positive-sense RNA astroviruses are mostly known to be enteric viruses. In recent years, though, different astroviruses were reported in association with neurological disease in various species. In cattle, two distinct neurotropic astrovirus genotype species we...
Autores principales: | , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2019
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6591865/ https://www.ncbi.nlm.nih.gov/pubmed/31234899 http://dx.doi.org/10.1186/s13028-019-0466-0 |
_version_ | 1783429795690840064 |
---|---|
author | Boujon, Céline Louise Koch, Michel Christoph Kauer, Ronja Véronique Keller-Gautschi, Elsbeth Hierweger, Melanie Michaela Hoby, Stefan Seuberlich, Torsten |
author_facet | Boujon, Céline Louise Koch, Michel Christoph Kauer, Ronja Véronique Keller-Gautschi, Elsbeth Hierweger, Melanie Michaela Hoby, Stefan Seuberlich, Torsten |
author_sort | Boujon, Céline Louise |
collection | PubMed |
description | BACKGROUND: The small, single-stranded positive-sense RNA astroviruses are mostly known to be enteric viruses. In recent years, though, different astroviruses were reported in association with neurological disease in various species. In cattle, two distinct neurotropic astrovirus genotype species were described in numerous cases of nonsuppurative encephalomyelitis, with one of these viruses also reported in similar circumstances in several sheep. Here, we retrieved archived formalin-fixed, paraffin-embedded brain tissues of a muskox diagnosed with a comparable disease pattern in 1982 and investigated them for the presence of neurotropic astroviruses with various techniques. RESULTS: Initially, tissue samples scored positive for both neurotropic astroviruses by immunohistochemistry; however, unexpected results with further immunohistochemical testing, in situ hybridization and qRT-PCR prompted us to submit an RNA extract from the animal’s brain material to next-generation sequencing. We were thus able to obtain the full genome of a novel astrovirus, muskox astrovirus CH18 (MOxAstV-CH18), whose closest relative is an enteric ovine astrovirus. Subsequently, viral RNA could be detected with a specific RT-PCR in the brain of the affected animal, but not in faecal samples from the current muskoxen herd of the animal park where the animal used to be kept. CONCLUSIONS: We identified a novel astrovirus in a historical case of a captive muskox with nonsuppurative encephalomyelitis. Unfortunately, our results and the fact that no material from organs other than of the nervous system was available do not allow any assumption about the epidemiology or pathogenesis of the virus. Still, these findings are yet another piece of evidence that the tropism and species specificity of astroviruses could be more deceptive than generally assumed. |
format | Online Article Text |
id | pubmed-6591865 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-65918652019-07-08 Novel encephalomyelitis-associated astrovirus in a muskox (Ovibos moschatus): a surprise from the archives Boujon, Céline Louise Koch, Michel Christoph Kauer, Ronja Véronique Keller-Gautschi, Elsbeth Hierweger, Melanie Michaela Hoby, Stefan Seuberlich, Torsten Acta Vet Scand Research BACKGROUND: The small, single-stranded positive-sense RNA astroviruses are mostly known to be enteric viruses. In recent years, though, different astroviruses were reported in association with neurological disease in various species. In cattle, two distinct neurotropic astrovirus genotype species were described in numerous cases of nonsuppurative encephalomyelitis, with one of these viruses also reported in similar circumstances in several sheep. Here, we retrieved archived formalin-fixed, paraffin-embedded brain tissues of a muskox diagnosed with a comparable disease pattern in 1982 and investigated them for the presence of neurotropic astroviruses with various techniques. RESULTS: Initially, tissue samples scored positive for both neurotropic astroviruses by immunohistochemistry; however, unexpected results with further immunohistochemical testing, in situ hybridization and qRT-PCR prompted us to submit an RNA extract from the animal’s brain material to next-generation sequencing. We were thus able to obtain the full genome of a novel astrovirus, muskox astrovirus CH18 (MOxAstV-CH18), whose closest relative is an enteric ovine astrovirus. Subsequently, viral RNA could be detected with a specific RT-PCR in the brain of the affected animal, but not in faecal samples from the current muskoxen herd of the animal park where the animal used to be kept. CONCLUSIONS: We identified a novel astrovirus in a historical case of a captive muskox with nonsuppurative encephalomyelitis. Unfortunately, our results and the fact that no material from organs other than of the nervous system was available do not allow any assumption about the epidemiology or pathogenesis of the virus. Still, these findings are yet another piece of evidence that the tropism and species specificity of astroviruses could be more deceptive than generally assumed. BioMed Central 2019-06-24 /pmc/articles/PMC6591865/ /pubmed/31234899 http://dx.doi.org/10.1186/s13028-019-0466-0 Text en © The Author(s) 2019 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. |
spellingShingle | Research Boujon, Céline Louise Koch, Michel Christoph Kauer, Ronja Véronique Keller-Gautschi, Elsbeth Hierweger, Melanie Michaela Hoby, Stefan Seuberlich, Torsten Novel encephalomyelitis-associated astrovirus in a muskox (Ovibos moschatus): a surprise from the archives |
title | Novel encephalomyelitis-associated astrovirus in a muskox (Ovibos moschatus): a surprise from the archives |
title_full | Novel encephalomyelitis-associated astrovirus in a muskox (Ovibos moschatus): a surprise from the archives |
title_fullStr | Novel encephalomyelitis-associated astrovirus in a muskox (Ovibos moschatus): a surprise from the archives |
title_full_unstemmed | Novel encephalomyelitis-associated astrovirus in a muskox (Ovibos moschatus): a surprise from the archives |
title_short | Novel encephalomyelitis-associated astrovirus in a muskox (Ovibos moschatus): a surprise from the archives |
title_sort | novel encephalomyelitis-associated astrovirus in a muskox (ovibos moschatus): a surprise from the archives |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6591865/ https://www.ncbi.nlm.nih.gov/pubmed/31234899 http://dx.doi.org/10.1186/s13028-019-0466-0 |
work_keys_str_mv | AT boujoncelinelouise novelencephalomyelitisassociatedastrovirusinamuskoxovibosmoschatusasurprisefromthearchives AT kochmichelchristoph novelencephalomyelitisassociatedastrovirusinamuskoxovibosmoschatusasurprisefromthearchives AT kauerronjaveronique novelencephalomyelitisassociatedastrovirusinamuskoxovibosmoschatusasurprisefromthearchives AT kellergautschielsbeth novelencephalomyelitisassociatedastrovirusinamuskoxovibosmoschatusasurprisefromthearchives AT hierwegermelaniemichaela novelencephalomyelitisassociatedastrovirusinamuskoxovibosmoschatusasurprisefromthearchives AT hobystefan novelencephalomyelitisassociatedastrovirusinamuskoxovibosmoschatusasurprisefromthearchives AT seuberlichtorsten novelencephalomyelitisassociatedastrovirusinamuskoxovibosmoschatusasurprisefromthearchives |