[Allergenic properties of the substance produced by the Streptococcus strain sp. Thom-1606].

The newly isolated biologically active agent "STP" (the substance produced by Streptococcus strain sp. TOM-1606) has been found to possess no allergenic properties. This new preparation has shown hyposensitizing activity on the level with the allergen. The morphological data obtained in the study of the organs of experimental animals have revealed the immunostimulating action of preparation "STP" on the body, that is confirmed by the characteristic transformation of the internal organs of experimental animals.