Which of these diseases does NOT require the introduction of foreign nucleic acid?

kuru

polio

rabies

St. Louis encephalitis

Answer: Kuru

Explanation:

Kuru are transmitted by prion. This diseases are untreatable and ultimately fatal.

Prions are infectious proteinaceous particle that are neither virus nor do they contain nucleic acid.

They are transmitted by ingestion of the infected nervous system tissues. They are normally found in the healthy brain tissues if this protein is mis-folded into denatured form it can cause disease.