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Incubation period of disease or survival time following i.p. inoculation of adult mice and neonatal mice with 10-fold dilutions of ME7 scrapie-infected brain homogenate. Shaded symbols represent individual terminally affected mice with a histolopathologically confirmed scrapie diagnosis. Unshaded symbols represent mice with a negative clinical and histopathological diagnosis that survived beyond the last clinical case in their challenge age group.
