ISRCTN ISRCTN38082350
DOI https://doi.org/10.1186/ISRCTN38082350
Secondary identifying numbers Asclin/003/2008
Submission date
28/11/2008
Registration date
03/12/2008
Last edited
06/02/2013
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

Contact information

Dr Reinaldo Martins
Scientific

Av. Brasil 4365
Manguinhos
Rio de Janeiro
21040-900
Brazil

Study information

Study designDouble-blind randomised controlled trial
Primary study designInterventional
Secondary study designRandomised controlled trial
Study setting(s)Other
Study typeTreatment
Participant information sheet Not available in web format, please use the contact details below to request a patient information sheet
Scientific titleDose-response study of 17DD yellow fever vaccine produced by Bio-Manguinhos/Fiocruz
Study objectivesYellow fever vaccine on lower doses is effective and safe.
Ethics approval(s)Ethics Committee of Instituto de Pesquisa Clínica Evandro Chagas gave approval on the 10th November 2008 (ref: 0038.0.009.000-08)
Health condition(s) or problem(s) studiedYellow fever vaccination
InterventionVaccination with one dose (subcutaneously [sc]) of yellow fever vaccine in current use or in five decreasing dilutions, and a placebo (placebo will receive vaccine as soon as possible):

Reference vaccine (in current use): approximately 60,000 PFU (approximately 12,000 MLD50)
Arm 1: approximately 20,000 PFU (approximately 4,000 MLD50)
Arm 2: approximately 6,667 PFU (approximately 1,300 MLD50)
Arm 3: approximately 2,222 PFU (approximately 450 MLD50)
Arm 4: approximately 740 PFU (approximately 150 MLD50)
Arm 5: approximately 246 PFU (approximately 50 MLD50)
Arm 6: placebo

Those who do not become protected by vaccination and the placebo group will receive one dose of the reference vaccine. Volunteers will be followed up for a month after vaccination. One year after vaccination there will be another blood collection, for evaluation of duration of immunity.
Intervention typeDrug
Pharmaceutical study type(s)
PhaseNot Specified
Drug / device / biological / vaccine name(s)17DD yellow fever vaccine
Primary outcome measureNeutralising antibodies: seroconversion and titre, during 30 days after vaccination
Secondary outcome measures1. Reactogenicity, measured with blood chemistry before vaccination, 5 days and 30 days after vaccination
2. Frequency of viraemia, evaluated 5 days after vaccination
3. Duration of immunity, measured 30 days after vaccination and one year later (9 - 15 months is acceptable)
Overall study start date01/03/2009
Completion date01/09/2010

Eligibility

Participant type(s)Patient
Age groupAdult
Lower age limit18 Years
Upper age limit30 Years
SexMale
Target number of participants1050
Key inclusion criteria1. Adult men
2. Aged 18 - 30 years old
3. Healthy
4. Agree to participate after reading and understanding Free and Informed Consent Form
Key exclusion criteria1. Prior vaccination against yellow fever
2. Female
3. Use of immunosuppressor drugs in the last 12 months
4. Personal history of autoimmune diseases
5. Personal history of thymus diseases
6. Personal history of anaphylactic reactions to foods, drugs or vaccines
7. Personal history of allergy to eggs, erythromycin, canamycin or gelatin
8. Persons who received immunoglobulin, blood transfusions or blood derivatives in the last 12 months
9. Persons who received live virus vaccines or cholera vaccine in the last 30 days or who plan to receive them in the following 30 days after yellow fever vaccination
Date of first enrolment01/03/2009
Date of final enrolment01/09/2010

Locations

Countries of recruitment

  • Brazil

Study participating centre

Av. Brasil 4365
Rio de Janeiro
21040-900
Brazil

Sponsor information

Bio-Manguinhos/Fiocruz (Brazil)
Research organisation

Av. Brasil 4365
Manguinhos
Rio de Janeiro
21040-900
Brazil

Website http://www.fiocruz.br/
ROR logo "ROR" https://ror.org/05gj5j117

Funders

Funder type

Research organisation

Foundation for Scientific and Technological Development in Health (Fundação para o Desenvolvimento Científico e Tecnológico em Saúde [FIOTEC])/Oswaldo Cruz Foundation (Fundacio Oswaldo Crux [Fiocruz]) (Brazil)

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 01/04/2013 Yes No