- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00584844
Safety and Immunogenicity Study of a Live Francisella Tularensis Vaccine
December 30, 2019 updated by: U.S. Army Medical Research and Development Command
A Longitudinal Phase 2 Study for the Continued Evaluation of the Safety and Immunogenicity of a Live Francisella Tularensis Vaccine, NDBR 101, Lot 4
This study is designed to determine the safety and immunogenicity of a Live Francisella tularensis Vaccine
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
Study was designed as a continuation of previously published research and targets subjects who were at risk of occupational exposure to F tularensis virus.
Based on screening examinations; if a subject had a positive baseline titer (<1:20) and gave no history of significant exposure to F tularensis or history of tularemia disease, had never received tularemia vaccination, and was at risk of exposure to F tularensis they could be enrolled in this protocol to receive vaccination.
Subjects returned for follow-up exams on Days 1, 2, and 7; once between Days 12 and 16; and once between Days 28 and 35 post-vaccination.
If titers; after blood samples on Days 28, 35 and 12 months showed <1:20 the vaccination could be repeated at Days 56-84.
If the repeat titer remained <1:20, a booster vaccination could be administered.
Subjects could be boosted 2 times with 1 year.
If the titer measured 12 months after vaccination (+30 days) was >1:20 and the subject had no lingering AEs, the subjects participation was considered complete.
Study Type
Interventional
Enrollment (Actual)
484
Phase
- Phase 2
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
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Maryland
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Fort Deterick, Maryland, United States, 21702
- U.S. Army Medical Research Institute of Infectious Diseases
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
15 years to 63 years (Child, Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:>
- At least 18 years old, or if on active military duty, 17 years old >
- Females of childbearing potential must agree to have a urine pregnancy test immediately before vaccination (Exception: documented hysterectomy or > 3 years of menopause). The results must be negative. Volunteers must agree not to become pregnant for 3 months after receipt of the vaccine.>
- Subject must be actively enrolled in the SIP >
- Subjects must be considered at risk for exposure to F. tularensis.>
- Subjects must have an up-to-date (within 1 year) medical history, physical examination, and laboratory tests on their charts and be medically cleared for participation by an investigator. Examinations or tests may be repeated within 1 year at the discretion of the enrolling physician.>
- Volunteer must be willing to return for all follow-up visits on days 1, 2, 7, once between days 12-16, and once between days 28-35, days 56-84 (if needed), all visits for serology, as well as an annual visit while enrolled in protocol.>
- Volunteer must agree to report any Adverse Event which may or may not be associated with administration of the test article for at least 28 days after vaccination. All Serious and Unexpected Adverse Events will be reported for the duration of the volunteer's participation in the study. >
Exclusion Criteria:>
- Clinically significant abnormal lab results including evidence of Hepatitis C*, Hepatitis B* carrier state, or elevated liver function tests (2X normal values or at discretion of PI).>
- Personal history of an immunodeficiency or current treatment with an oral or intravenous immunosuppressive medication.>
- Confirmed HIV* infection.>
- Any other medical condition at the discretion of the PI.>
- Antibiotic therapy for 7 days before vaccination.>
- Females must not be pregnant or lactating (females must agree to not become pregnant for 3 months after vaccination).>
- Any known allergies to excipients of the vaccine>
- Administration of another live vaccine within 4 weeks or an inactivated vaccine (generally) within 7 days of tularemia vaccination.>
- Any unresolved adverse event resulting from a previous immunization. >
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: F tularensis Vaccine (0.0025 mL)
Subjects receive a small amount of F tularensis vaccine (0.0025mL) placed on a cleansed site on the skin on the volar surface of the forearm.
A bifurcated needle was used to make 15 superficial punctures at the vaccination site to permit percutaneous penetration of the vaccine.
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Subjects will receive one drop of reconstituted F tularensis vaccine (approximately 0.0025 ml), applied with a bifurcated needle to the volar surface of the forearm, and the skin will be pricked 15 times over the prepared area.
A booster dose will be given at the same dose volume and route of administration if the titer (days 56-84) is inadequate (< 1:20).
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Safety: Adverse Event Category Rates for All Vaccinations
Time Frame: AEs/SAEs recorded through duration of study; immunogenicity via MA on days 0, 28-35, 56-84, and at 1 year
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AE analysis was conducted for all intent-to-treat subjects regardless of compliance with titer schedule.
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AEs/SAEs recorded through duration of study; immunogenicity via MA on days 0, 28-35, 56-84, and at 1 year
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Immunogenicity: Protocol Compliant Post-primary Titer Rates
Time Frame: 12 months
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Percentage of subjects with less than or greater than titers (> or < 1:20) for compliant post-primary titers.
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12 months
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Immunogenicity: Protocol-compliant Post-boost 1 Titer Rates
Time Frame: 12 months
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Percentage of subjects with less than or greater than titers (> or < 1:20) who received post-boost 1
|
12 months
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Immunogenicity: Protocol-compliant Post-boost 2 Titer
Time Frame: 12 months
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Percentage of subjects with less than or greater than titers who received post-boost 2. Responder = > 1:20 Non-responder = < 1:20 |
12 months
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
October 1, 2004
Primary Completion (Actual)
October 1, 2009
Study Completion (Actual)
October 1, 2013
Study Registration Dates
First Submitted
December 20, 2007
First Submitted That Met QC Criteria
December 20, 2007
First Posted (Estimate)
January 2, 2008
Study Record Updates
Last Update Posted (Actual)
January 2, 2020
Last Update Submitted That Met QC Criteria
December 30, 2019
Last Verified
December 1, 2019
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- A-12775
- FY03-24 (Other Identifier: SIP)
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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