slow-vi·rus dis·ease(slō vī'rŭs di-zēz')
1. An older term for any disease caused by spongiform encephalopathies, including kuru of humans and scrapie of sheep, classified as slow virus disease but now recognized as prion protein disease.
2. A disorder that follows a slow, progressive course spanning months to years, frequently involving the central nervous system and ultimately leading to death, such as subacute sclerosing panencephalitis, seemingly caused by the measles virus.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012