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Unformatted text preview: heart and cause severe heart disease. Slow-developing diseases. Other diseases of the nervous system are believed due to viruses that have not yet been isolated. An example is kuru , a slow-developing disease observed in South Pacific peoples. Kuru is called a slow virus disease because the symptoms, which include nervous tremors, take over a year to appear. Similar diseases are Creutzfeldt-Jakob disease, scrapie (in goats and sheep), bovine spongiform encephalopathy (the mad cow disease), and a number of other diseases possibly caused by prions. Prions are protein particles that do not appear to have nucleic acid associated with them....
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- Fall '08