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  • Title: [Swiss scrapie surveillance. I. Clinical aspects of neurological diseases in sheep and goats].
    Author: Maurer E, Botteron C, Ehrensperger F, Fatzer R, Jaggy A, Kolly C, Meylan M, Zurbriggen A, Doherr MG.
    Journal: Schweiz Arch Tierheilkd; 2005 Oct; 147(10):425-33. PubMed ID: 16259408.
    Abstract:
    Small ruminants infected with scrapie show a large range of often unspecific clinical symptoms. The most-often described signs, locomotion, sensibility and behavioural disorders and emaciation, rarely occur together, and cases have been described in which only one of those signs was detectable.Thus, formulating a well-circumscribed definition of a clinical suspect case is difficult. Most animals with CNS-effecting diseases such as listeriosis, polioencephalomacia, cerebrospinal nematidiasis and enterotoxemia will, in a thorough neurological examination, show at least some scrapie-like symptoms. Among the 22 neurological field cases examined in this study, a goat with cerebral gliomatosis and hair lice showed the closest similarity to clinical scrapie. The unilateral deficiency of the cerebral nerves has potential as an clinical exclusion criterion for scrapie. However, the laboratory confirmation--or exclusion--of scrapie remains important. It thus needs to be realized that a consistent and thorough examination of neurologically diseased small ruminants (including fallen stock) is the backbone of a good surveillance system for these diseases. This should be a motivation for submitting adult sheep and goats for neuropathological examination.
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