ClinicalTrials.gg
CompletedNCT03676634Updated Oct 19, 2021Results posted

Tolerability and Immunogenicity of rBV A/B for the Production of BabyBIG®

A Phase 2 interventional study of rBV A/B in Botulism, sponsored by California Department of Public Health. Completed at 2 sites in United States. Open to participants aged 18 Years to 69 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-10-19.

Sponsored by California Department of Public Health · Phase 2, Interventional, and Other

Phase
Phase 2
Study type
Interventional
Enrollment
32
Allocation
Not applicable
Ages
18 Years to 69 Years
Sex
All
01

Study summary

This Phase 2, open-label, uncontrolled study designed to evaluate safety, tolerability, and immunogenicity of a single dose of rBV A/B in healthy participants previously immunized with pentavalent botulinum toxoid (or pentavalent botulinum toxoid and rBV A/B) for occupational protection will be conducted to collect source plasma for potential use in the production of BabyBIG and to evaluate safety and immunogenicity of the vaccine in these participants over a 12-week period, with a follow-up safety assessment at 6 months.

02

Conditions studied

  • Botulism

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03

In context

Botulism

20 studies on the registry are indexed under Botulism; 3 are open to participants now.

This study's enrollment of 32 is above the median of 29 across 14 interventional studies indexed under Botulism.

Browse Botulism studies →

Lead sponsor

California Department of Public Health is the lead sponsor of 3 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 69 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Have received pentavalent botulinum toxoid (or pentavalent botulinum toxoid and rBV A/B) for occupational protection under BB IND 0161 (or BB-IND-0161 and IND 015155)
  2. Be 18 to 69 years old at the time of consent
  3. Be healthy and have an acceptable medical history that will not interfere with the objectives of the study
  4. Meet the participant suitability requirements and recommendations for source plasma donors outlined in Appendix A.
  5. If female, and of , have a negative pregnancy test at screening and within 24 hours prior to vaccination and must not plan to become pregnant until after the last plasma donation or until the Week 12 visit ([whichever occurs last].
  6. Have the ability to understand the requirements of the study, have provided written as evidenced by signature on an informed consent form (ICF) approved by the Committee for the Protection of Human Subjects, and have agreed to abide by the study restrictions and to return for the required assessments
  7. Agree to complete the participant home diary on a daily basis for 7 days post vaccination, as well as to report any adverse events and concomitant medications during the study period
  8. Have provided written authorization for use and disclosure of protected health information
  9. Agree not to donate blood or blood products (outside of study procedures) until after the last plasma donation or until the Week 12 visit (whichever occurs last)
  10. Have personal health insurance

Exclusion criteria

Exclusion Criteria:

  1. Be pregnant or nursing
  2. Have a history of laboratory evidence of syphilis, acquired immunodeficiency syndrome, Creutzfeldt-Jakob disease, or infection with human immunodeficiency viruses () 1 or 2, human T-cell lymphotropic virus 1, virus (HBV), or virus (HCV)
  3. Have had a prior severe (Grade 3 or higher) local or severe (Grade 3 or higher) systemic reaction to last immunization with pentavalent botulinum toxoid or a prior severe immediate reaction or severe systemic reaction to last vaccination on Day 0 with rBV A/B
  4. Have known allergy to aluminum, yeast, or other components of the vaccine
  5. Have donated one or more units of blood or undergone plasmapheresis within 49 days of the Vaccination Visit (Day 0)
  6. Have received blood product or immunoglobulin within 6 months prior to study entry or plans to receive such products during the study period (exclusive of returned red blood cells as part of the plasmapheresis procedure). For participants who choose to donate plasma, this will apply until their last plasma donation or at the Week 12 visit (whichever occurs last)
  7. Have received licensed nonliving vaccine within 14 days prior to study entry, or licensed within 60 days prior to study entry
  8. Have received products (drugs, biologics, vaccines, or implantable devices) 60 days prior to study entry or plans to receive experimental products at any time during the study period. For participants who choose to donate plasma, this will apply until their last plasma donation or at the Week 12 visit (whichever occurs last)
  9. Have received prescription or immunomodulatory agents, including parenteral, inhaled, or oral within 3 months of study entry or plans on receiving such therapy at any time during the study period [For participants who choose to donate plasma, this will apply until their last plasma donation or at the Week 12 visit (whichever occurs last)], with the exceptions mentioned below

    • Participants who have used prescription topical steroids may be enrolled 2 weeks after the therapy is completed
    • Intra-articular, bursal, or tendon injectable steroids are permitted
    • Any over-the-counter topical steroid use is permitted
    • Ophthalmic and intranasal steroids are permitted
  10. Have received cytotoxic therapy at any time in the previous 5 years before study entry
  11. Have an active systemic or recurrent disease that would place the participant at unacceptable risk of injury, require hospitalization, or require surgical intervention (This includes active mental illness or history of mental illness not responsive to treatment.)
  12. Have a history of alcohol or drug abuse or dependence within 12 months of study entry
  13. Have past, present, or suspected illicit injection drug use
  14. Have inflammatory, vasculitic, or rheumatic disease, including systemic lupus erythematosus, polymyalgia rheumatica, rheumatoid arthritis, or scleroderma (Stable osteoarthritis treated with physical therapy and nonsteroidal anti inflammatory drugs is not an exclusion criterion.)
  15. Have any acute or chronic neuromuscular or neurologic disorder
  16. Have clinically confirmed hepatic or renal insufficiency
  17. Have uncontrolled hypertension, as defined a systolic blood pressure greater than 160 mmHg and diastolic blood pressure greater than 90 mmHg
  18. Have moderate to severe asthma, , or other significant pulmonary disease
  19. Have a seizure disorder
  20. Have moderate or severe illness or oral temperature of 100.4°F or greater within 3 days of Vaccination Visit (Day 0)
  21. Be unsuitable for participation in this study for any reason, as assessed by the investigator
Terms in these criteria, in plain language(11)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

Live vaccines

Vaccines made with a weakened form of the germ, such as measles–mumps–rubella (MMR), chickenpox and yellow fever. They can be risky when the immune system is weakened. Flu injections are not live; the nasal flu spray is.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

COPD

Chronic obstructive pulmonary disease: long-term lung disease that makes it hard to breathe out, including emphysema and chronic bronchitis.

05

Study design

Phase
Phase 2
Primary purpose
Other
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
32 participants (actual)

Study arms

  • Experimental
    Vaccine

    rBV A/B

    Biological: rBV A/B

Interventions

06

What researchers measure

Primary outcomes

  1. Proportion of Subjects Achieving Greater Than 3- or 4-Fold Increases in Neutralizing Antibody Concentration (NAC)

    Neutralizing Antibody Concentration in Plasma

    Time frame: Week 0 to Week 4

Secondary outcomes

  1. Proportion of Subjects Achieving Greater Than 2-Fold Increase in Neutralizing Antibody Concentration (NAC)

    Neutralizing Antibody Concentration in Plasma

    Time frame: Week 0 to 12

Other outcomes

  1. Volume of Plasma Collected With an Acceptable Anti-type A or Anti-type B Titer

    Neutralizing Antibody Concentration in Plasma

    Time frame: Week 0 to 4

07

Results

Posted Oct 19, 2021

Participant flow

A total of 32 participants were enrolled during the recruiting period from 07 March 2019 to 29 August 2019.

Participant flow — Overall Study
Milestone0.5 mL rBV A/B
Started32
Screening32
Participants received rbv a/b injection32
Participants included in the plasma-donating population32
Participants completed follow up32
Completed29
Not completed3
Withdrew: Red blood cell loss1
Withdrew: Out-of-limit pulse2

Outcome measures

PrimaryProportion of Subjects Achieving Greater Than 3- or 4-Fold Increases in Neutralizing Antibody Concentration (NAC)

Neutralizing Antibody Concentration in Plasma

Time frame:
Week 0 to Week 4
Reported as:
Number · proportion of participants
Proportion of Subjects Achieving Greater Than 3- or 4-Fold Increases in Neutralizing Antibody Concentration (NAC)
proportion of participants0.5 mL rBV A/B
Proportion of participants with a ≥4x increase in type A NAC.844 (.672 to .947)
Proportion of participants with a ≥3x increase in type A NAC.938 (.792 to .992)
Proportion of participants with a ≥4x increase in type B NAC.875 (.710 to .965)
Proportion of participants with a ≥3x increase in type B NAC.906 (.750 to .980)
Statistical analysis
  • 0.5 mL rBV A/B · Single proportion: .844 · 95% CI .672 to .947Values listed in table are for Type A. Estimated Value for the Estimation Parameter for type B = 0.875. Lower limit = 0.710, upper limit = 0.965
SecondaryProportion of Subjects Achieving Greater Than 2-Fold Increase in Neutralizing Antibody Concentration (NAC)

Neutralizing Antibody Concentration in Plasma

Time frame:
Week 0 to 12
Reported as:
Number · proportion of participants
Proportion of Subjects Achieving Greater Than 2-Fold Increase in Neutralizing Antibody Concentration (NAC)
proportion of participants0.5 mL rBV A/B
two times or greater increase in type A NAC compared with Week 0.906 (.750 to .980)
two times or greater increase in type B NAC compared with Week 0.844 (.672 to .947)
Other pre-specifiedVolume of Plasma Collected With an Acceptable Anti-type A or Anti-type B Titer

Neutralizing Antibody Concentration in Plasma

Time frame:
Week 0 to 4
Reported as:
Number · mL
Volume of Plasma Collected With an Acceptable Anti-type A or Anti-type B Titer
mL0.5 mL rBV A/B
Total volume of plasma from all donating participants470,102
Total volume of plasma from donating participants with any positive titer470,102
Total volume of plasma from donating participants with positive anti-A titer470,102
Total volume of plasma from donating participants with positive anti-B titer469,411

Adverse events

Collected over Non-serious AEs (injection site reactions/systemic reactions) were only collected from day 0 - day 7 during the participant diary collection period. For the rest of the study (from day 7 through 12 weeks of site visits and through the week 26 follow up phone call), AEs were only collected if they were SAEs.. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
0.5 mL rBV A/B0/32 (0%)1/32 (3.1%)5/32 (15.6%)
Most frequent serious events
Most frequent serious events
Event0.5 mL rBV A/B
pulmonary embolismRespiratory, thoracic and mediastinal disorders1/32
Most frequent other events
Most frequent other events
Event0.5 mL rBV A/B
injection site erythemaGeneral disorders4/32
injection site indurationGeneral disorders3/32
injection site painGeneral disorders1/32

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)0.5 mL rBV A/B
<=18 years0
Between 18 and 65 years30
>=65 years2
Age, Continuous
Age, Continuous(years)0.5 mL rBV A/B
Mean46.6 ± 8.80
Age, Continuous
Age, Continuous(years)0.5 mL rBV A/B
Median44.5 (33 to 69)
Sex: Female, Male
Sex: Female, Male(Participants)0.5 mL rBV A/B
Female16
Male16
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)0.5 mL rBV A/B
Hispanic or Latino0
Not Hispanic or Latino32
Unknown or Not Reported0
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)0.5 mL rBV A/B
Hispanic or Latino0
Not Hispanic or Latino32
Unknown or Not Reported0
Race (NIH/OMB)
Race (NIH/OMB)(Participants)0.5 mL rBV A/B
American Indian or Alaska Native0
Asian3
Native Hawaiian or Other Pacific Islander0
Black or African American1
White28
More than one race0
Unknown or Not Reported0
Region of Enrollment
Region of Enrollment(participants)0.5 mL rBV A/B
United States32

1 further baseline measures are reported on the registry.

08

Study locations

2 sites
  • California Department of Public Health
    Richmond, California 94804, United States
  • Battelle Biomedical Research Center
    West Jefferson, Ohio 43162, United States
09

References and documents

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 19, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT03676634
Lead sponsor
California Department of Public Health
Responsible party
Sponsor
First posted
Sep 19, 2018
Start date
Mar 7, 2019
Primary completion
Apr 25, 2020
Completion
Jul 3, 2020
Results posted
Oct 19, 2021
Last update
Oct 19, 2021

Study contacts

Stephen Arnon, M.D., M.P.H.
principal investigator · California Department of Public Health

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Studies of the drug tested here: Recombinant botulinum vaccine A/B

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