Pneumococcal Vaccines Early and in Combination (PREVIX_COMBO)
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Prevention
|Official Title:||A Randomised Controlled Trial of Pneumococcal Conjugate Vaccines Synflorix and Prevenar13 in Sequence or Alone in High-risk Indigenous Infants (PREV-IX_COMBO): Immunogenicity, Carriage and Otitis Media Outcomes|
- Immunogenicity [ Time Frame: 7 months of age ]At 7 months of age, the overall and serotype specific (particularly serotype 19A and HiD) a IgG Geometric Mean Concentration (GMC) b proportion of children with IgG GMC above threshold (0.35 microg/mL)
- nasopharyngeal carriage [ Time Frame: 7 months of age ]At 7 months of age, the proportion of children with any carriage of serotype 19A pneumococci
- nasopharyngeal carriage [ Time Frame: 7 months of age ]At 7 months of age, the proportion of children with any carriage of non-capsular H. influenzae.
- otitis media [ Time Frame: 7 months of age ]At 7 months of age, the proportion of children with any otitis media.
|Study Start Date:||August 2011|
|Estimated Study Completion Date:||June 2017|
|Estimated Primary Completion Date:||December 2016 (Final data collection date for primary outcome measure)|
|Active Comparator: Synflorix||
The 10-valent vaccine contains 1 µg of purified capsular polysaccharide of pneumococcal serotypes 1, 5, 6B, 7F, 9V, 14, and 23F conjugated to protein D, 3 µg of serotype 4 conjugated to protein D, 3 µg of serotype 18C conjugated to tetanus toxoid and 3 µg of serotype 19F conjugated to diphtheria toxoid.
Other Name: PHiD-CV
|Active Comparator: Prevenar13||
The vaccine is a ready to use homogeneous white suspension for intramuscular injection, supplied as a pre-filled syringe.
Each 0.5 mL dose contains:
2.2 μg of pneumococcal purified capsular polysaccharides for serotypes 1, 3, 4, 5, 6A, 7F, 9V, 14, 18C, 19A, 19F and 23F 4.4 μg of pneumococcal purified capsular polysaccharides for serotype 6B. Each serotype is individually conjugated to non-toxic diphtheria CRM197 protein and adsorbed on aluminium phosphate (0.565 mg). CRM197 is a nontoxic variant of diphtheria toxin isolated from cultures of Corynebacterium diphtheriae strain C7 (β197) grown in a casamino acids and yeast extract-based medium.
Other Name: PCV13
COMBINATION SCHEDULE of comparator vaccine 1 and comparator vaccine 2 Synflorix at 1,2,4 months then Prevenar13 at 6 months.
COMBINATION SCHEDULE of vaccine 1 and vaccine 2: Synflorix (PHiD-CV) at 1,2,4 months then Prevenar13 (PCV13) at 6 months of age.
Other Name: Combination schedule
Aboriginal children in the Northern Territory (NT) have high rates of otitis media caused by non-capsular H. influenzae (NCHi) and pneumococci. Pneumococcal conjugate vaccine has effectively reduced disease caused by the 7 serotypes. Rates of non-vaccine serotype otitis media (OM), particularly 19A is increasing, and NCHi continues to be a major pathogen in perforations. Parallels with pneumonia are highly probable in this population. Vaccines with expanded and early age protection are needed.
In early 2009 GSK's pneumococcal H. influenzae protein D conjugate vaccine (PHiD-CV) was licensed in Australia. Compared to the current vaccine, 7PCV, this vaccine offers protection from pneumococcal serotypes 1, 5, 7F as well as NCHi (which is a primary pathogen of OM, and possibly pneumonia). However by 2010, a new generation of Wyeth's 7PCV, PCV13 will also be licensed in Australia. Compared to PHiD-CV this vaccine offers protection from additional serotypes 3, 6A and 19A, however it does not offer protection from NCHi infection. There is no empirical evidence to suggest that either vaccine will have superior clinical efficacy for otitis media or pneumonia in high-risk children. The novel combination strategy proposed for this trial has the potential to provide the best of both vaccines.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01174849
|Contact: Amanda J Leach, PhD||+61 8 firstname.lastname@example.org|
|Australia, Northern Territory|
|Menzies School of Health Research||Recruiting|
|Darwin, Northern Territory, Australia, 0811|
|Contact: Amanda J Leach, PhD +61 8 89228196 ext 28649 email@example.com|
|Principal Investigator: Amanda J Leach, PhD|
|Principal Investigator:||Amanda J Leach, PhD||Menzies School of Health Research|