Immune Response Elicited by Concomitant Administration of Oral Typhoid Fever (Vivotif®) and Cholera (Dukoral®) Vaccines
Study Details
Study Description
Brief Summary
The goal of this clinical trial is to explore the coadministration of oral typhoid fever (Vivotif®) and cholera (Dukoral®) vaccines in healthy volunteers aged 18-65 years. The main question it aims to answer is:
• Does coadministration impact the immune responses to Vivotif® and Dukoral® vaccines
Participants will:
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receive either oral typhoid fever (Vivotif®) or oral cholera (Dukoral®) vaccines or both simultaneously
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give blood samples for immunogenicity analyses
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participate in adverse event follow up
Researchers will compare those receiving only one of the vaccines to those receiving both simultaneously to see if coadministration has an impact on antigen-specific responses measured with:
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ELISPOT (plasmablast responses specific to Salmonella typhi, Vibrio Cholerae and Enterotoxigenic Escherichia coli)
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ELISA (antibodies in lymphocyte supernatants (ALS) and serum antibodies specific to vaccine antigens)
Condition or Disease | Intervention/Treatment | Phase |
---|---|---|
|
Phase 4 |
Study Design
Arms and Interventions
Arm | Intervention/Treatment |
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Active Comparator: Vivotif Three oral doses of typhoid fever vaccine (Vivotif®). |
Biological: Oral typhoid fever vaccine
Oral typhoid fever vaccine (Vivotif®) on Days 0, 2 and 4.
Other Names:
|
Active Comparator: Dukoral Two oral doses of cholera vaccine (Dukoral®). |
Biological: Oral cholera vaccine
Oral cholera vaccine (Dukoral®) on Days 0 and 7.
Other Names:
|
Experimental: Dukoral+Vivotif Oral typhoid fever and cholera vaccines (Vivotif® and Dukoral®) administered simultaneously. |
Biological: Oral typhoid fever vaccine
Oral typhoid fever vaccine (Vivotif®) on Days 0, 2 and 4.
Other Names:
Biological: Oral cholera vaccine
Oral cholera vaccine (Dukoral®) on Days 0 and 7.
Other Names:
|
Outcome Measures
Primary Outcome Measures
- Magnitude of antigen-specific plasmablast responses to oral typhoid fever (Vivotif®) and cholera (Dukoral®) vaccines (ASCs/million PBMCs) [Blood samples on Days 0-7 for all participants and Days 12-14 for participants in Dukoral and Dukoral+Vivotif arms.]
Measurement of IgA -, IgG- and IgM-secreting antibody cells (ASC ELISPOT) specific to Salmonella typhi (whole cell), Vibrio cholerae (whole cell and CTB-toxin) and Enterotoxigenic Escherichia coli (ETEC whole cell and LTB-toxin).
Secondary Outcome Measures
- Titer of antigen-specific antibodies in lymphocyte supernatants (ALS) to oral typhoid fever (Vivotif®) and cholera (Dukoral®) vaccines. [Blood samples on Days 0-7 for all participants and Days 12-14 for participants in Dukoral and Dukoral+Vivotif arms.]
Measurement of anti-salmonella, anti-cholera and anti-ETEC antibodies in ALS samples (ELISA)
Other Outcome Measures
- Titer of antigen-specific serum antibodies to oral typhoid fever (Vivotif®) and cholera (Dukoral®) vaccines. [Blood samples on Days 0 and 28 ± 3 for all participants.]
Measurement of anti-salmonella, anti-cholera and anti-ETEC antibodies in serum (ELISA)
Eligibility Criteria
Criteria
Inclusion Criteria:
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Male or female subjects aged ≥18 to ≤65 years.
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General good health as established by medical history and physical examination.
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Written informed consent.
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Females of childbearing potential must agree to use an efficacious hormonal or barrier method of birth control during the study (14 days before immunization to day 28 ± 3). Abstinence is acceptable.
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Available for all visits scheduled in this study.
Exclusion Criteria:
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Vaccination against typhoid fever or cholera within 5 years before dosing.
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History of clinical typhoid fever or cholera.
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Immunization with any other vaccine (oral or parenteral) within 4 weeks prior to study period or vaccination planned during it.
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Current intake of antibiotics or end of antibiotic therapy <8 days before first IMP administration.
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Chronic (longer than 14 days) administration of immunosuppressants or other immunemodifying drugs within 6 months before the first dose of IMP; oral corticosteroids in dosages of ≥0.5 mg/kg/d prednisolone or equivalent are excluded; inhaled or topical steroids allowed.
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Acute or chronic clinically significant gastrointestinal disease.
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Any confirmed or suspected immunosuppressive or immunodeficient condition, including human immunodeficiency virus (HIV) infection.
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Pregnancy or lactation.
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Acute disease at the time of enrolment (defined as the presence of a moderate or severe illness with or without fever (fever defined as body temperature of ≥38 °C).
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Alcohol or drug abuse.
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Suspected non-compliance.
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Use of any investigational drug or vaccine within 30 days preceding the first dose of study vaccine, or planned use during the study period.
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Any clinically significant history of known or suspected anaphylaxis or hypersensitivity reaction based on the judgement of the investigator.
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Employee at the investigational site or relative or spouse of the investigator.
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Any other criteria which, in the investigator's opinion, would compromise the ability of a subject to participate in the study, a subject's well-being, or the outcome of the study.
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
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1 | Meilahti Vaccine Research Center, Helsinki University Hospital | Helsinki | Finland | 00290 |
Sponsors and Collaborators
- Helsinki University Central Hospital
- University of Helsinki
Investigators
- Principal Investigator: Anu Kantele, MD, PhD, Meilahti Vaccine Research Center, MeVac, Helsinki University Hospital
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- Dukoral+Vivotif