Figure 5. Quantification of chronic wasting disease prions. Diseased transgenic (Tg) mice Tg(CerPrP)1536+/– inoculated with dilutions of brain homogenate are indicated by filled symbols Asymptomatic mice are indicated by open circles; time at which asymptomatic aged mice were either euthanized or died of illnesses unrelated to prion disease is shown. Error bars indicate SEM. n/n0 refers to the number of mice developing prion disease divided by the number of inoculated mice. Also shown are the mean incubation times of diseased Tg(CerPrP)1536+/– mice inoculated with antler velvet preparations (filled squares).