The results of the isolation of antigenic fractions and their complexes from Cl. oedematiens toxin and the study of their antigenic properties are presented. The purified, concentrated toxin has been found to consist of high- and low-molecular antigens differing in immunogenicity and affinity to aluminium hydroxide used as sorbent. Preparations obtained from low-molecular antigens easily adsorbed by the low doses of the sorbent possessed high specific and immunogenic activity.
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