Volume 12, Number 12—December 2006
Perspective
On the Question of Sporadic or Atypical Bovine Spongiform Encephalopathy and Creutzfeldt-Jakob Disease
Figure 1

Figure 1. Distribution of ages at onset of illness in 500 cases of neuropathologically verified or experimentally transmitted sporadic Creutzfeldt-Jakob disease. Approximately 10% of cases occur in patients during the middle third (25–49 years) of a human lifespan, which corresponds to age in cattle of ≈7–13 years.