[A radioimmunological method for determining IgA-class antimeningococcal secretory antibodies in human saliva].

The data on the content of secretory IgA antibodies to group A Neisseria meningitidis protein antigen in the saliva of persons, both having had contact with N. meningitidis culture and having had no such contact, are presented. The results were obtained by the method of radioimmunoassay, developed specially for the determination of N. meningitidis protein antigen.