Lesion profiles in C57BL/6 mice after transmission of vCJD,
BSE, sCJD, iCJD, and scrapie. Lesion profiles are (a)
cattle BSE and British vCJD (two pooled cases); (b)
cattle BSE and the first of the three French vCJD cases;
(c) cattle BSE and BSE after primary transmission to
macaques; (d) cattle BSE and BSE after secondary
transmission to macaques; (e) cattle BSE, the
mouse-adapted C506 M3 scrapie strain (derived from U.S. sheep scrapie),
natural sheep scrapie (two pooled cases from a single French flock);
(f) French vCJD and a French case of sCJD;
(g) the former sCJD and one French case of iCJD linked
to the administration of growth hormone; and (h) same as
in g plus the natural sheep scrapie. The dotted lines
belong to the lesion profiles of vCJD (in a and
b) and of macaque-BSE (in c and
d). Vacuolation was scored on a scale of 0–5 in the
following brain areas: 1, medulla; 2, pons/mesencephalon; 3,
cerebellar cortex; 4, colliculi; 5, hypothalamus; 6, thalamus; 7,
hippocampus; 8, septum; 9, cerebral cortex; and 10, striatum.