Abstract |
The safety and immunogenicity of a vaccine against Haemophilus influenzae type b consisting of purified polyribosylribitol phosphate conjugated to tetanus toxoid ( PRP-T) were evaluated in 277 Chilean infants who were randomly assigned to one of three treatment groups: Group A, PRP-T mixed with diphtheria- tetanus- pertussis ( DTP) vaccine in a single syringe and given as a single inoculation in one arm and placebo in the other arm; Group B, PRP-T given in one arm and DTP in the other arm; Group C, DTP given in one arm and placebo in the other. Infants were immunized at 2, 4 and 6 months of age and examined daily for 4 days after each immunization. Serum PRP antibodies; tetanus, diphtheria and pertussis antitoxin; pertussis agglutinins; and antibodies to Bordetella pertussis filamentous hemagglutinin were measured at baseline and 2 months after each dose. PRP-T was well-tolerated. After three doses of PRP-T vaccine 100% of infants attained PRP antibody concentrations > or = 0.15 micrograms/ml and 96 to 99% achieved high anti-PRP concentrations (> or = 1.0 micrograms/ml). The post-third dose anti-PRP geometric mean titer was high (6.94 micrograms/ml) in infants who were given PRP-T combined with DTP, although it was somewhat lower than the geometric mean titer of the group who received PRP-T in a separate arm (9.93 micrograms/ml) (P not significant).(ABSTRACT TRUNCATED AT 250 WORDS)
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Authors | A Avendano, C Ferreccio, R Lagos, I Horwitz, M Cayazzo, B Fritzell, C Meschievitz, M Levine |
Journal | The Pediatric infectious disease journal
(Pediatr Infect Dis J)
Vol. 12
Issue 8
Pg. 638-43
(Aug 1993)
ISSN: 0891-3668 [Print] United States |
PMID | 8414775
(Publication Type: Clinical Trial, Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
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Chemical References |
- Antibodies, Bacterial
- Diphtheria-Tetanus-Pertussis Vaccine
- Haemophilus Vaccines
- Haemophilus influenza type b polysaccharide vaccine-tetanus toxin conjugate
- Tetanus Toxoid
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Topics |
- Antibodies, Bacterial
(biosynthesis, blood)
- Diphtheria
(immunology, prevention & control)
- Diphtheria-Tetanus-Pertussis Vaccine
(administration & dosage, adverse effects, immunology)
- Double-Blind Method
- Haemophilus Infections
(immunology, prevention & control)
- Haemophilus Vaccines
(administration & dosage, adverse effects, immunology)
- Humans
- Infant
- Tetanus
(immunology, prevention & control)
- Tetanus Toxoid
(administration & dosage, adverse effects, immunology)
- Whooping Cough
(immunology, prevention & control)
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