the results of serological surveys , carried out with a view to the detection of capsular meningococcal polysaccharides in the passive hemagglutination ( pha ) test and covering 1,289 patients with systemic meningococcal infection , 221 patients with bacteriologically confirmed meningococcal nasopharyngitis , 2,820 persons in organized groups of children and adults with different epidemiological situation ( including 650 carriers ) and 4,050 residents of 8 cities with different morbidity levels , were analyzed .
C0027361
persons
C0008059
children