Bruce M E, Fraser H
Neuropathol Appl Neurobiol. 1982 Jan-Feb;8(1):71-4. doi: 10.1111/j.1365-2990.1982.tb00259.x.
The frequency of cerebral amyloid plaques in murine scrapie was not influenced by the age of the mouse at injection in a study using several combinations of agent strain and mouse strain. In addition amyloid plaques were not seen in a series of extremely old uninfected mice.