1 APHIS. 2004. Scrapie. Accessed Aug. 7, 2007.

2 Le Dur, A., V. Béringue, O. Andréoletti, F. Reine, T. L. Laï, T. Baron, B. Bratberg, J. L. Vilotte, P. Sarradin, S. L. Benestad, and H. Laude. 2005. A newly identified type of scrapie agent can naturally infect sheep with resistant genotypes.  Proc. Natl. Acad. Sci. USA. 102:16031-16036.

3 USDA. 2004. Phase II: Scrapie: Ovine Slaughter Surveillance Study 2002-2003. Accessed Aug. 7, 2007.

4 Andréoletti, O., S. Simon, C. Lacroux, N. Morel, G. Tabouret, A. Chabert, S. Lugan, F. Corbière, P. Ferré, G. Foucras, H. Laude, F. Eychenne, J. Grassi, and F. Schelcher. 2004. PrPSc accumulation in myocytes from sheep incubating natural scrapie. Nat. Med. 10:591-593.

5 Hunter, N., J. Foster, A. Chong, S. McCutcheon, D. Parnham, S. Eaton, C. MacKenzie, and F. Houston. 2002. Transmission of prion diseases by blood transfusion. J. Gen. Virol.  83:2897-2905.

6 Ligios, C., C. J. Sigurdson, C. Santucciu, G. Carcassola, G. Manco, M. Basagni, C. Maestrale, M. G. Cancedda, L. Madau, and A. Aguzzi. 2005. PrPSc in mammary glands of sheep affected by scrapie and mastitis. Nat. Med. 11:1137-1138.

7 Seeger, H., M. Heikenwalder, N. Zeller, J. Kranich, P. Schwarz, A. Gaspert, B. Seifert, G. Miele, and A. Aguzzi. 2005. Coincident scrapie infection and nephritis lead to urinary prion excretion. Science. 310:324-326.

8 Cooke, C., and G. Shaw. 2007. Fate of prions in soil: Longevity and migration of recPrP in soil columns. Soil Biol. Biochem. 39:1181-1191.

9 Georgsson, G., S. Sigurdarson, and P. Brown.  2006. Infectious agent of sheep scrapie may persist in the environment for at least 16 years. J. Gen. Virol. 87:3737-3740.

10 Vaccari, G., M. A. Di Bari, L. Morelli, R. Nonno, B. Chiappini, G. Antonucci, S. Marcon, E. Esposito, P. Fazzi, N. Palazzini, P. Troiano, A. Petrella, G. Di Guardo, and U. Agrimi. 2006. Identification of an allelic variant of the goat PrP gene associated with resistance to scrapie. J. Gen. Virol. 87:1395-1402.

11 Bulgin, M. S., and S. S. Melson. 2007. What veterinary practitioners should know about scrapie. J. Am. Vet. Med. Assoc. 230:1158-1164.

12 AVMA. 2002. About scrapie. Accessed Jun. 29, 2007.

13 O’Rourke, K. I., T. V. Baszler, T. E. Besser, J. M. Miller, R. C. Cutlip, G. A. H. Wells, S. J. Ryder, S. M. Parish, A. N. Hamir, N. E. Cockett, A. Jenny, and D. P. Knowles. 2000. Preclinical diagnosis of scrapie by immunohistochemistry of third eyelid lymphoid tissue. J. Clin. Microbiol. 38:3254-3259.

14 USAHA. 2006. Report of the Committee on Scrapie. Accessed Jun. 29, 2007.

15 Cutlip, R. C., J. M. Miller, A. N. Hamir, J. Peters, M. M. Robinson, A. L. Jenny, H. D. Lehmkuhl, W. D. Taylor, F. D. Bisplinghoff. 2001. Resistance of cattle to scrapie by the oral route. Can. J. Vet. Res. 65:131-132.

16 AVMA. 2002. The rationale for ridding U.S. of scrapie. Accessed Jun. 29, 2007.

17 Commission of the European Communities. 2003. Commission decision of 13 February 2003 laying down minimum requirements for the establishment of breeding programmes for resistance to transmissible spongiform encephalopathies in sheep. Off. J. Eur. Commun. L41-45.

18 Baylis, M. 2007. The Kafkaesque approach to scrapie control – A sense of impending danger. Vet. J. 173:235-236. 

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