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Prion diseases

BSE in sheep bred for resistance to infection

Abstract

Selective breeding for disease-resistant genotypes is being pursued as a means of eradicating scrapie (and bovine spongiform encephalopathy (BSE), if it is present) from sheep flocks. Here we show that the genotype associated with the highest resistance can still be infected with BSE by intracerebral inoculation. Although the relevance of this finding to sheep exposed to natural infection remains to be determined, it may have important implications for disease-eradication strategies.

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Figure 1: Immunohistochemical labelling of abnormal PrP protein in the dorsal motor nucleus of the vagus of a sheep that is homozygous for the ARR allele (see text) and has been infected with bovine spongiform encephalopathy (BSE).

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Correspondence to Fiona Houston.

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The authors declare no competing financial interests.

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Houston, F., Goldmann, W., Chong, A. et al. BSE in sheep bred for resistance to infection. Nature 423, 498 (2003). https://doi.org/10.1038/423498a

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