One hundred and four scrapie positive and 77 negative goats from 34 Greek mixed flocks were analysed by prion protein gene sequencing and 17 caprine scrapie isolates from 11 flocks were submitted to molecular isolate typing. For the first time, the protective S146 variant was reported in Greece, while the protective K222 variant was detected in negative but also in five scrapie positive goats from heavily infected flocks. By immunoblotting six isolates, including two goat flockmates carrying the K222 variant, showed molecular features slightly different from all other Greek and Italian isolates co-analysed, possibly suggesting the presence of different scrapie strains in Greece.
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http://dx.doi.org/10.1186/1297-9716-42-104 | DOI Listing |
mBio
November 2024
Department of Medical Microbiology and Immunology, School of Medicine, Creighton University, Omaha, Nebraska, USA.
Pathogens
July 2024
Friedrich-Loeffler-Institut, 17493 Greifswald-Isle of Riems, Germany.
After the detection of bovine spongiform encephalopathy (BSE), and a zoonotic transmissible spongiform encephalopathy (TSE) caused by the pathological prion protein (PrP) in two goats, the investigation of goat prions became of greater interest. Therefore, a broad collection of European goat TSE isolates, including atypical scrapie, CH1641 and goat BSE as reference prion strains were biochemically characterised and subsequently inoculated into seven rodent models for further analysis (already published results of this comprehensive study are reviewed here for comparative reasons). We report here the histopathological and immunohistochemical data of this goat TSE panel, obtained after the first passage in Tgshp IX (tg-shARQ) mice, which overexpress the ovine prion protein.
View Article and Find Full Text PDFJ Infect Dis
July 2024
Université Paris-Saclay, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, Université Versailles-Saint Quentin, Unité de Virologie Immunologie Moléculaires, Jouy-en-Josas, France.
Background: Atypical/Nor98 scrapie (AS) is an idiopathic infectious prion disease affecting sheep and goats. Recent findings suggest that zoonotic prions from classical bovine spongiform encephalopathy (C-BSE) may copropagate with atypical/Nor98 prions in AS sheep brains. Investigating the risk AS poses to humans is crucial.
View Article and Find Full Text PDFNeuropathol Appl Neurobiol
February 2024
Wageningen Bioveterinary Research, Wageningen University and Research, Lelystad, the Netherlands.
Aim: CH1641 was discovered in 1970 as a scrapie isolate that was unlike all other classical strains of scrapie isolated so far. We performed bio-assays of CH1641 in mice in order to further characterise this specific isolate.
Methods: We inoculated the original CH1641 isolate into ovine and bovine prion protein (PrP) transgenic mice as well as wild-type mice.
PLoS Pathog
December 2023
Virus and Prion Research Unit, National Animal Disease Center, USDA, ARS, Ames, Iowa, United States of America.
Prion agents occur in strains that are encoded by the structure of the misfolded prion protein (PrPSc). Prion strains can influence disease phenotype and the potential for interspecies transmission. Little is known about the potential transmission of prions between sheep and deer.
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