title: [Humoral immune response to the capsular polysaccharide of Neisseria meningitidis serogroup C in an antimeningococcal BC vaccination trial in Antioquia, Colombia].
abstract: As a complement to studying humoral immune response to the proteins of an antimeningococcal vaccine (VA-MENGOC-BC) against serogroups B and C, the humoral immune response to polysaccharide C of the vaccine was also evaluated in 142 children from 1 to 5 years of age in an area of the Department of Antioquia, Colombia. Paired pre-(T0) and post-vaccination (T1) sera were tested for IgG response by means of ELISA and for serum lytic capacity against a strain of serogroup C by means of the bactericidal antibodies test (BAT). Response to the vaccine was statistically significant (P < 0.01) by both techniques. PAB demonstrated seroconversion (T1/T0 > or = 4) in 88% (95% confidence interval, CI95%: 80% to 95%) of all those who were seronegative before vaccination. The proportion of seroconversion in children 2, 3, and 4 years of age was 86% or more. Of all the sera tested with ELISA, 93% (CI95%: 89% to 97%) showed response to the vaccine (T1/T0 > or = 2), and 98% (CI95%: 94% to 100%) of the subjects with T0 < or = 500 U/mL seroconverted. In this sample, the vaccine stimulated a specific and protective response as measured by ELISA and BAT, the latter test being utilized to evaluate protection status.
authors.affiliation: Instituto Finlay, La Habana, Cuba.
authors.forename: M L
authors.initials: ML
authors.lastname: Echeverry Uribe
authors.forename: J A
authors.initials: JA
authors.lastname: Malberty Agüero
authors.forename: L A
authors.initials: LA
authors.lastname: Galeano Marín
authors.forename: F T
authors.initials: FT
authors.lastname: Sotolongo Padrón
authors.forename: M A
authors.initials: MA
authors.lastname: Galguera Domínguez
authors.forename: C M
authors.initials: CM
authors.lastname: Montoya Barrientos
authors.forename: O
authors.initials: O
authors.lastname: Martínez Ruiz
authors.forename: M C
authors.initials: MC
authors.lastname: Nerey
authors.forename: M A
authors.initials: MA
authors.lastname: Camarasa
authors.forename: J
authors.initials: J
authors.lastname: Bacallao Gallestey
mesh_terms: D000907:Antibodies, Bacterial / Q000096:biosynthesis*; D016667:Bacterial Capsules / Q000276:immunology*; D001428:Bacterial Vaccines / Q000276:immunology*; D002675:Child, Preschool; D003105:Colombia; D016001:Confidence Intervals; D006801:Humans; D007223:Infant; D022401:Meningococcal Vaccines; D009345:Neisseria meningitidis / Q000145:classification / Q000276:immunology*; D011135:Polysaccharides, Bacterial / Q000276:immunology*; D012703:Serotyping
chemical_list: D000907:Antibodies, Bacterial; D001428:Bacterial Vaccines; D022401:Meningococcal Vaccines; D011135:Polysaccharides, Bacterial
vernacular_title: Respuesta inmune humoral al polisacárido capsular de Neisseria meningitidis serogrupo C en un ensayo de vacunación antimeningocócica BC en Antioquia, Colombia.