Final answer:
Kuru, a prion disease, can only be transmitted to humans through cannibalism and is not known to be transmitted to any other species.
Step-by-step explanation:
Kuru, a prion disease, can only be transmitted to humans through cannibalism. It was once commonly found in the Fore tribe in Papua New Guinea where the disease was spread through the consumption of highly infective brain material from cannibalized bodies. Kuru is not known to be transmitted to any other species.