Meningococcal polyvaccine on the basis of cleared IgAI protease
IgA1-protease allocated from the culture <i>N. meningitidis</i> serogroup A. As original materials were used three different intermediate products of vaccine production: cultural fluid, cetavlon supernatant and cetavlon precipitate. IgA1-protease was used to evaluate their protectivity and immunogenity. It was shown, that isolated IgA1 protease from the meningococcus serogroup A is able to protect mice, infected by meningococcus serogroup B.