title: Long term effects of vaccination of patients deficient in a late complement component with a tetravalent meningococcal polysaccharide vaccine.
abstract: Of 45 Russian patients with late complement component deficiency (LCCD) who experienced one to five meningococcal infections, 31 were immunised with a meningococcal A/C/W135/Y polysaccharide vaccine and were followed for 3-8 years. Total and immunoglobulin (Ig) class specific concentration of antibodies to meningococcal polysaccharides in sera of LCCD patients increased significantly 1 month after vaccination and remained elevated for 3 years. Revaccination of LCCD patients 3 years after the first dose restored the total Ig concentrations to those observed 1 year after the first vaccination. Six new episodes of meningococcal infection in four patients developed in the group of 31 vaccinees; six episodes in six patients developed in the same time in the group of 14 non-vaccinated LCCD persons. Survival analysis demonstrated the risk to contract meningococcal disease decreased significantly for vaccinees in comparison to non-vaccinees (P<0.05). Vaccination with of meningococcal tetravalent polysaccharide vaccine decreases the risk of meningococcal infection in LCCD patients.
mesh_terms: D000328:Adult; D000907:Antibodies, Bacterial / Q000096:biosynthesis; D003165:Complement System Proteins / Q000172:deficiency*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007117:Immunization, Secondary; D007070:Immunoglobulin A / Q000096:biosynthesis; D007074:Immunoglobulin G / Q000096:biosynthesis; D007075:Immunoglobulin M / Q000096:biosynthesis; D007700:Kinetics; D008070:Lipopolysaccharides / Q000009:adverse effects / Q000276:immunology*; D008297:Male; D008585:Meningitis, Meningococcal / Q000134:cerebrospinal fluid / Q000276:immunology / Q000517:prevention & control; D022401:Meningococcal Vaccines / Q000009:adverse effects / Q000276:immunology*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012703:Serotyping; D014611:Vaccination
chemical_list: D000907:Antibodies, Bacterial; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D008070:Lipopolysaccharides; D022401:Meningococcal Vaccines; D003165:Complement System Proteins