[Effect of vitamin A on immunogenesis].

Experiments made on mice, rats and rabbits have shown that administration of vitamin A promotes an increase in the weight of the lymphoid organs, thymus and spleen and stimulates production of the antibody-forming cells by the spleen, as well as that of serum antibodies during immunization with different antigens: sheep red blood cells, influenza virus, tetanus and staphylococcal toxoids. The possible mechanisms that underlie vitamin A action are discussed.