Effect of 2 versus 3 pneumococcal conjugate vaccinations Prevnar on nasopharyngeal carriage, transmission and herd immunity; a randomized, controlled study.

ISRCTN ISRCTN25571720
DOI https://doi.org/10.1186/ISRCTN25571720
ClinicalTrials.gov number NCT00189020
Secondary identifying numbers MINOES 01, STEG R05 008
Submission date
20/12/2005
Registration date
20/12/2005
Last edited
31/05/2019
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Infections and Infestations
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data

Plain English summary of protocol

Not provided at time of registration

Study website

Contact information

Prof E.A.M. Sanders
Scientific

University Medical Center Utrecht
Department of Pediatric Immunology
HP 06.063.0
P.O. Box 85090
Lundlaan 6
Utrecht
3508 AB
Netherlands

Phone +31 (0)30 2504000
Email l.sanders@umcutrecht.nl

Study information

Study designRandomised controlled trial
Primary study designInterventional
Secondary study designRandomised controlled trial
Study setting(s)Not specified
Study typeNot Specified
Scientific titleEffect of 2 versus 3 pneumococcal conjugate vaccinations Prevnar on nasopharyngeal carriage, transmission and herd immunity; a randomized, controlled study.
Study acronymMINOES
Study objectivesStudy hypotheses amended as of 22/05/2007:
1. Two vaccinations with 7-valent conjugate vaccine before six months of age will protect against invasive pneumococcal disease in the first 18 to 24 months of life
2. Two vaccinations at 2 and 4 months of age without a booster vaccination at 11 months will have less effect on vaccine-type pneumococcal carriage reduction and therefore also herd-immunity and respiratory tract infections but also less pneumococcal replacement by non-vaccine types and other potentially pathogenic bacteria
3. Anti-pneumococcal antibody development after two vacinations with 7-valent conjugate vacine before six months of age and revaccination at 24 months of age will be equal or better compared with antibody development after two vaccination before six months of age followed by booster vaccination at 11 and 24 months of age. Later vaccination will improve long term protection

Previous study hypothesis:
1. Two vaccinations before the age of 6 months with the pneumococcal conjugate vaccine Prevnar in infants will protect the children against invasive pneumococcal disease.
2. Two vaccinations at 2 and 4 months of age without a booster vaccination at 11 months will have less effect on vaccine-type pneumococcal carriage reduction and therefore also herd-immunity and respiratory tract infections but also less pneumococcal replacement by non-vaccine types and other potentially pathogenic bacteria.
Ethics approval(s)Approval received from the local medical ethics board (Stichting Therapeutische Evaluatie Geneesmiddelen [STEG], acknowledged by the Centrale Commissie Mensgebonden Onderzoek [CCMO], The Netherlands) on the 21st June 2005 (ref: STEG R05.008, version 6).

First and second amendment (collection of saliva for immunological analysis and extension microbiology research of collected nasopharyngeal swabs in subgroups of children) approved on the 11th September 2006.

Third amendment (addition of booster vaccination at 24 months and blood sampling) approved on the 2nd March 2007 (ref: STEG R05-008, MINOES version 8 dd february 2007).
Health condition(s) or problem(s) studiedInvasive pneumococcal disease, Respiratory tract infection.

Added as of 22/05/2007:
Change in: nasopharyngeal carriage after reduced doses 7-valent conjugate vaccine, antipneumococcal antibody development, family transmission of pneumococci
InterventionThree groups of each 333 newborns:
Group I: Prevnar at age 2 and 4 months
Group II: Prevnar at age 2, 4 and 11 months
Group III: Prevnar at age 24 months

Amendment made as of 22/05/2007:
Groups I and II will receive booster vaccination 7-valent conjugate vaccine at 24 months of age.
Intervention typeDrug
Pharmaceutical study type(s)
PhaseNot Specified
Drug / device / biological / vaccine name(s)Pneumococcal conjugate vaccine Prevnar
Primary outcome measurePneumococcal nasopharyngeal carriage before 2 months of age, and at 6, 12, 18 and 24 months of age in vaccinated children (groups I and II) and controls (group III), and NP pneumococcal carriage of siblings and parents/caregivers when the baby is 12 and 24 months of age (herd immunity).
Secondary outcome measures1. Determination of pneumococcal (vaccine and non-vaccine serotypes) colonization of infants in the Netherlands before introduction of Prevnar in the National Vaccination Program (group III)
2. Evaluation of replacing pneumococcal serotypes after Prevnar vaccinations
3. Influence of Prevnar vaccinations on other colonizing bacterial species like Staphylococcus, H. influenzae, M. catarrhalis and Streptococcus
4. Anti pneumococcal antibody levels at 12 and 24 months after 2 doses as compared to 2+1 Prevnar vaccinations
5. Relation between invasive pneumococcal disease and pneumococcal colonization in the Netherlands
6. Evaluation of potential reduction of physician-diagnosed acute otitis media and lower respiratory tract infections after pneumococcal conjugate vaccinations

Added as of 22/05/2007:
7. Comparison of anti-pneumococcal antibody levels after vaccinations at 2, 4 and 24 months, at 2, 4, 11 and 24 months and after primo-vaccination at 24 months of age in subgroups of 80 children of groups I, II and III
8. Comparison of B-memory cells after vaccination at 24 months of age after vaccination schemes of groups I, II and III
Overall study start date20/06/2005
Completion date01/03/2008

Eligibility

Participant type(s)Patient
Age groupNeonate
SexBoth
Target number of participants1000
Total final enrolment1003
Key inclusion criteria1000 healthy newborns (and family members) who will receive childhood vaccinations according to the national vaccination program, starting at 2 months of age.
Key exclusion criteriaExclusion from the national vaccination program because of the presence of a medical condition requiring treatment that can interfere with the results of vaccinations, known of suspected allergy to components of the vaccine, known or suspected immunodeficiency disease other than IgA or IgG-subclass deficiency, previous treatment with plasma or immunoglobulins, previous vaccinations other than hepatitis B vaccinations, coagulations disorders
Date of first enrolment20/06/2005
Date of final enrolment01/03/2008

Locations

Countries of recruitment

  • Netherlands

Study participating centre

University Medical Center Utrecht
Utrecht
3508 AB
Netherlands

Sponsor information

University Medical Centre Utrecht (UMCU) (Netherlands)
University/education

PO Box 85500
Utrecht
3508 GA
Netherlands

Website http://www.umcutrecht.nl/zorg/
ROR logo "ROR" https://ror.org/04pp8hn57

Funders

Funder type

Government

The Netherlands Ministry of Health, Welfare and Sport (The Netherlands)

No information available

Results and Publications

Intention to publish date
Individual participant data (IPD) Intention to shareNo
IPD sharing plan summaryNot provided at time of registration
Publication and dissemination planNot provided at time of registration
IPD sharing plan

Study outputs

Output type Details Date created Date added Peer reviewed? Patient-facing?
Results article results 01/09/2011 31/05/2019 Yes No
Results article results 01/12/2014 31/05/2019 Yes No
Results article results 01/08/2014 31/05/2019 Yes No
Results article results 02/12/2013 31/05/2019 Yes No
Results article results 01/12/2011 31/05/2019 Yes No
Results article results 01/02/2014 31/05/2019 Yes No
Results article results 08/07/2009 31/05/2019 Yes No
Results article results 08/09/2010 31/05/2019 Yes No

Editorial Notes

31/05/2019: The following changes were made:
1. Publication reference added.
2. Total final enrolment added.
3. Clinicaltrials.gov number added.