[Yeast NaRNA as a stimulator of the virulence, immunogenicity and antigenicity of salmonellae].

Experiments on a great number of animals with the use of various methods showed that yeast NaRNA was capable of stimulating the increase of virulence, immunogenicity and antigenicity in S. typhi, the acceleration of their proliferation and growth, the accumulation of RNA and nucleotides without increasing their toxigenicity.