Figure 2From: Studies of the transmissibility of the agent of bovine spongiform encephalopathy to the domestic chickenKaplan-Meier survival data for sub-passage study. Survival data is shown for chickens challenged intracranially with inoculum made from parenterally (orange), orally (blue) BSE-challenged chickens exhibiting the neurological syndrome, from clinically normal saline-challenged control chickens (black) of the primary exposure study and a separate intracranially saline-challenged control group (grey).Back to article page