Научно-исследовательский институт физико-химической биологии им. А.Н. Белозерского
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.