noun, plural elegies. 1. a mournful, melancholy, or plaintive poem, especially a funeral song or a lament for the dead. 2. a poem written in elegiac meter. 3. a sad or mournful musical composition. Origin of elegy.
Hepatitis D virus (HDV) is an RNA virus that is structurally unrelated to hepatitis A (HAV), hepatitis B (HBV), or hepatitis C virus (HCV). It was discovered in 1977. HDV causes a unique infection that requires the assistance of viral particles from HBV to replicate and infect other hepatocytes.Its clinical course is varied and ranges from acute, self-limited infection to acute, fulminant liver failure.
Discovery of prions. In 1967 Alper & Griffith developed the infectious protein hypothesis to explain the then already known few diseases later known to be caused by prions, scrapie and Creutzfeld-Jakob disease [4 & 5]. It was Prusiner in 1982 that isolated the prion protein and coined the term prion [1].