The experiments on 52 rabbits have been carried out to show the possibility to use Proteus antigen with high content of H-component (H1; H2; H3 Proteus antigens are most frequently found) for active immunization to make highly specific humoral immunity. The optimal scheme of immunization consists of 3 subcutaneous injections in doses of 0.25-0.25-0.5 mg of antigen within 7 days intervals and 0.25 mg dose of single revaccination. The duration of cycle immunization is 14 days.
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