[Demonstration of host-parasite common antigens in hydatidosis].

By means of gel agar diffusion techniques (Ouchterlony and immunoelectrophoresis), the authors have demonstrated in hydatid cyst fluid and membrane of E. granulosus, the presence of, at least, one fraction showing a human albumin specificity. This is not a contamination from the host and must be synthesized by the parasite itself. The significance of such a fraction is discussed.