It was shown that the yeast polisaccharides such as polyuronides from
Bullera tsugae, Sporobolomyces albo-rubescens and mannan sulfate from
Rhodotorula rubra (ronasan) stimulated the functional status of macrop
hages and antibody formation cells. Stimulation effect of polyuronides
was more expressed then that of ronasan, but the action of ronasan on
the antibody formation was more effective then that of the polyuronid
es.