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Sheep with scrapie and mastitis transmit infectious prions through the milk


Ligios, C; Cancedda, M G; Carta, A; Santucciu, C; Maestrale, C; Demontis, F; Sabat, M; Patta, C; Demartini, J C; Aguzzi, A; Sigurdson, C J (2011). Sheep with scrapie and mastitis transmit infectious prions through the milk. Journal of Virology, 85(2):1136-1139.

Abstract

Prions are misfolded proteins that are infectious and naturally transmitted, causing a fatal neurological disease in humans and animals. Prion shedding routes have been shown to be modified by inflammation in excretory organs such as kidney. Here we show that sheep with scrapie and lentiviral mastitis secrete prions into the milk and infect nearly 90% of suckling naive lambs. Thus lentiviruses may enhance prion transmission, conceivably sustaining prion infections in flocks for generations. This study also indicates a risk of prion spread to sheep and potentially to other animals through dietary exposure to pooled sheep milk or milk products.

Prions are misfolded proteins that are infectious and naturally transmitted, causing a fatal neurological disease in humans and animals. Prion shedding routes have been shown to be modified by inflammation in excretory organs such as kidney. Here we show that sheep with scrapie and lentiviral mastitis secrete prions into the milk and infect nearly 90% of suckling naive lambs. Thus lentiviruses may enhance prion transmission, conceivably sustaining prion infections in flocks for generations. This study also indicates a risk of prion spread to sheep and potentially to other animals through dietary exposure to pooled sheep milk or milk products.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Institute of Neuropathology
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
Language:English
Date:2011
Deposited On:15 Jan 2011 16:07
Last Modified:05 Apr 2016 14:28
Publisher:American Society for Microbiology
ISSN:0022-538X
Free access at:PubMed ID. An embargo period may apply.
Publisher DOI:10.1128/JVI.02022-10
PubMed ID:21084475
Permanent URL: http://doi.org/10.5167/uzh-39986

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