Antigen structure of Pityrosporum pachydermatis.

The purpose of the present work was to define the antigen structure of Pityrosporum pachydermatis. The prepared antigens and their respective antisera were studied by means of double diffusion test in an agar gel and crossed immunoelectrophoresis. The study made it possible to prove marked quantitative differences between some antigen fractions of a few strains of P. pachydermatis. It has not been reported, however, that there occur either of specific antigens or reaction of partial serological identity, which was the basis to ascertain no antigen differences within the strains of P. pachydermatis under study.