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Molecular Detection of Feline Coronavirus Based on Recombinase Polymerase Amplification Assay

Feline coronavirus (FCoV) is endemic in cat populations worldwide. Persistently, subclinically infected cats play a significant role in spreading the infection. Testing fecal samples of cats may facilitate efforts to decrease the viral burden within a population. Real-time RT-PCR is highly sensitive...

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Autores principales: Kobialka, Rea Maja, Ceruti, Arianna, Bergmann, Michelle, Hartmann, Katrin, Truyen, Uwe, Abd El Wahed, Ahmed
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8538120/
https://www.ncbi.nlm.nih.gov/pubmed/34684186
http://dx.doi.org/10.3390/pathogens10101237
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author Kobialka, Rea Maja
Ceruti, Arianna
Bergmann, Michelle
Hartmann, Katrin
Truyen, Uwe
Abd El Wahed, Ahmed
author_facet Kobialka, Rea Maja
Ceruti, Arianna
Bergmann, Michelle
Hartmann, Katrin
Truyen, Uwe
Abd El Wahed, Ahmed
author_sort Kobialka, Rea Maja
collection PubMed
description Feline coronavirus (FCoV) is endemic in cat populations worldwide. Persistently, subclinically infected cats play a significant role in spreading the infection. Testing fecal samples of cats may facilitate efforts to decrease the viral burden within a population. Real-time RT-PCR is highly sensitive and specific for the detection of FCoV but must be performed in a fully equipped laboratory. A simple and accurate assay is needed to identify FCoV at the point-of-need. The aim of this study was to develop a rapid FCoV detection assay based on isothermal amplification technology, i.e., reverse transcription-recombinase polymerase amplification (RT-RPA). Primers were designed to target the highly conserved 3′ untranslated region of the 7b gene. Running on a constant temperature of 42 °C, reverse transcription as well as DNA amplification and detection was achieved in a maximum of 15 min. A probit analysis revealed a detection limit of 58.5 RNA copies/reaction. For cross-detection, nucleic acids from 19 viruses were tested. Both RT-RPA and real-time RT-PCR showed cross-detection with canine coronavirus and transmissible gastroenteritis virus, but not with other pathogens. To evaluate clinical performance, RNA was extracted from 39 fecal samples from cats. All samples were tested simultaneously with real-time RT-PCR resulting in a RT-RPA sensitivity and specificity of 90.9% and 100%, respectively. RT-RPA can be considered a promising simple method for rapid detection of FCoV.
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spelling pubmed-85381202021-10-24 Molecular Detection of Feline Coronavirus Based on Recombinase Polymerase Amplification Assay Kobialka, Rea Maja Ceruti, Arianna Bergmann, Michelle Hartmann, Katrin Truyen, Uwe Abd El Wahed, Ahmed Pathogens Article Feline coronavirus (FCoV) is endemic in cat populations worldwide. Persistently, subclinically infected cats play a significant role in spreading the infection. Testing fecal samples of cats may facilitate efforts to decrease the viral burden within a population. Real-time RT-PCR is highly sensitive and specific for the detection of FCoV but must be performed in a fully equipped laboratory. A simple and accurate assay is needed to identify FCoV at the point-of-need. The aim of this study was to develop a rapid FCoV detection assay based on isothermal amplification technology, i.e., reverse transcription-recombinase polymerase amplification (RT-RPA). Primers were designed to target the highly conserved 3′ untranslated region of the 7b gene. Running on a constant temperature of 42 °C, reverse transcription as well as DNA amplification and detection was achieved in a maximum of 15 min. A probit analysis revealed a detection limit of 58.5 RNA copies/reaction. For cross-detection, nucleic acids from 19 viruses were tested. Both RT-RPA and real-time RT-PCR showed cross-detection with canine coronavirus and transmissible gastroenteritis virus, but not with other pathogens. To evaluate clinical performance, RNA was extracted from 39 fecal samples from cats. All samples were tested simultaneously with real-time RT-PCR resulting in a RT-RPA sensitivity and specificity of 90.9% and 100%, respectively. RT-RPA can be considered a promising simple method for rapid detection of FCoV. MDPI 2021-09-25 /pmc/articles/PMC8538120/ /pubmed/34684186 http://dx.doi.org/10.3390/pathogens10101237 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kobialka, Rea Maja
Ceruti, Arianna
Bergmann, Michelle
Hartmann, Katrin
Truyen, Uwe
Abd El Wahed, Ahmed
Molecular Detection of Feline Coronavirus Based on Recombinase Polymerase Amplification Assay
title Molecular Detection of Feline Coronavirus Based on Recombinase Polymerase Amplification Assay
title_full Molecular Detection of Feline Coronavirus Based on Recombinase Polymerase Amplification Assay
title_fullStr Molecular Detection of Feline Coronavirus Based on Recombinase Polymerase Amplification Assay
title_full_unstemmed Molecular Detection of Feline Coronavirus Based on Recombinase Polymerase Amplification Assay
title_short Molecular Detection of Feline Coronavirus Based on Recombinase Polymerase Amplification Assay
title_sort molecular detection of feline coronavirus based on recombinase polymerase amplification assay
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8538120/
https://www.ncbi.nlm.nih.gov/pubmed/34684186
http://dx.doi.org/10.3390/pathogens10101237
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