title: Determination of the immunization schedule for field trials with the synthetic malaria vaccine SPf 66.
abstract: The synthetic malaria vaccine SPf 66 has been shown to be safe, immunogenic and effective in trials performed with controlled groups naturally and experimentally exposed to the disease. In order to continue the trials in open populations, it was necessary to standardize the vaccination characteristics. We have performed four field trials with soldier volunteers with the aim, among others, of defining the number of doses required, the intervals between applications, the protein concentration, and the adjuvant to be used. In these trials, the vaccinated individuals' immune responses were evaluated by assaying anti-SPf 66 antibody titres, in vitro growth inhibition of the P. falciparum parasite, and the vaccinees' capacity to recognize P. falciparum native proteins. From these results we conclude that the best vaccination schedule, for adults, is three doses administered subcutaneously on days 0, 30 and 180, each containing 2 mg of the synthetic polymerized petide SPf 66 adsorbed to alum hydroxide.
authors.affiliation: Instituto de Inmunologìa, Hospital San Juan de Diós, Bogotá, Colombia.
authors.forename: C L
authors.initials: CL
authors.lastname: Rocha
authors.forename: L A
authors.initials: LA
authors.lastname: Murillo
authors.forename: A L
authors.initials: AL
authors.lastname: Mora
authors.forename: M
authors.initials: M
authors.lastname: Rojas
authors.forename: L
authors.initials: L
authors.lastname: Franco
authors.forename: J
authors.initials: J
authors.lastname: Cote
authors.forename: M V
authors.initials: MV
authors.lastname: Valero
authors.forename: A
authors.initials: A
authors.lastname: Moreno
authors.forename: R
authors.initials: R
authors.lastname: Amador
authors.forename: F
authors.initials: F
authors.lastname: Nuñez
mesh_terms: D000276:Adjuvants, Immunologic; D000293:Adolescent; D000328:Adult; D000595:Amino Acid Sequence; D000818:Animals; D000913:Antibodies, Protozoan / Q000276:immunology; D015153:Blotting, Western; D004306:Dose-Response Relationship, Immunologic; D006801:Humans; D007115:Immunization Schedule; D016778:Malaria, Falciparum / Q000517:prevention & control*; D008297:Male; D008969:Molecular Sequence Data; D010963:Plasmodium falciparum / Q000254:growth & development / Q000276:immunology; D015800:Protozoan Proteins; D016052:Protozoan Vaccines; D011994:Recombinant Proteins; D014614:Vaccines, Synthetic
chemical_list: D000276:Adjuvants, Immunologic; D000913:Antibodies, Protozoan; D015800:Protozoan Proteins; D016052:Protozoan Vaccines; D011994:Recombinant Proteins; C066269:SPf66 protein, Plasmodium; D014614:Vaccines, Synthetic