Allergenicity and immunotoxicity of Stodal preparation was assessed. Immunization of guinea pigs with Stodal in doses of 1 ml/kg and 10 ml/kg according to a standard scheme or mixed with complete Freund’s adjuvant did not provoke a systemic anaphylactic reaction or delayed allergenic reactions in animals. A single per os administration of the Stodal preparation in doses of 1mg/kg and 10 ml/kg to CBA line mice did not affect the inflammation response to concanavalin A (Con.A).

In F1 (CBA x C57BL/6) mice , Stodal perorally administrated at a dose of 1 ml/mg over 14 days caused a significant increase of thymus mass index and cellularity by 41.5% and in a dose of 10 ml/kg the thymus mass increased by 28.7% . The preparation administrated in the doses of 1 ml/kg and 10 ml/kg did not affect peritoneal macrophage phagocytic activity and indicators of the neutrophils hemi-luminescent response to opsonized zymosan. A two week administration of Stodal preparation in doses of 1 ml/kg and 10 ml/kg to CBA and C57BL/6 strain mice induced a significant stimulation of the humoral immune response. In F1 (CBA x C57BL/6) hybrid mice , 1 ml/kg dose administration induced an authentic increase of cellular immunity indicators. Thus, the Stodal preparation in the dose range investigated does not produce allergenic responses of non-delayed and delayed types and pseudoallergic reactions, stimulates humoral and cellular immunity and does not produce immune-toxic effect.