THE EFFECT OF ANIMAL AND PLANT PEPTONES ON THE DEVELOPMENT OF THE PIGMENT OF TRICHOPHYTON PURPUREUM

[摘要] The present paper confirms the fact that max. development of the purple pigment of Trichophvton purpureum occurs with dextrose, while pentoses, disaccharides, trisaccharides and polysaccharides are usually unsatisfactory. The origin of the peptone used as the nitrogen source is also an important factor, even in the presence of an excellent sugar source such as dextrose. The peptones of greatest value are those of animal origin or mixtures of animal plus plant peptones. The plant peptone used seems to be relatively unsatisfactory for the synthesis of the pigment of T. purpureum.