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
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.
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 →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.
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.
Exclusion Criteria:
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
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.
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.
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.
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 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 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.
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.
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.
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.
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.
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.
Chronic obstructive pulmonary disease: long-term lung disease that makes it hard to breathe out, including emphysema and chronic bronchitis.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
COPD
Chronic obstructive pulmonary disease: long-term lung disease that makes it hard to breathe out, including emphysema and chronic bronchitis.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
rBV A/B
Biological: rBV A/B
Drug page: Recombinant botulinum vaccine A/B
Recombinant Botulinum Vaccine A/B, rBV A/B
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
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
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
A total of 32 participants were enrolled during the recruiting period from 07 March 2019 to 29 August 2019.
| Milestone | 0.5 mL rBV A/B |
|---|---|
| Started | 32 |
| Screening | 32 |
| Participants received rbv a/b injection | 32 |
| Participants included in the plasma-donating population | 32 |
| Participants completed follow up | 32 |
| Completed | 29 |
| Not completed | 3 |
| Withdrew: Red blood cell loss | 1 |
| Withdrew: Out-of-limit pulse | 2 |
Neutralizing Antibody Concentration in Plasma
| proportion of participants | 0.5 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) |
Neutralizing Antibody Concentration in Plasma
| proportion of participants | 0.5 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) |
Neutralizing Antibody Concentration in Plasma
| mL | 0.5 mL rBV A/B |
|---|---|
| Total volume of plasma from all donating participants | 470,102 |
| Total volume of plasma from donating participants with any positive titer | 470,102 |
| Total volume of plasma from donating participants with positive anti-A titer | 470,102 |
| Total volume of plasma from donating participants with positive anti-B titer | 469,411 |
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.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| 0.5 mL rBV A/B | 0/32 (0%) | 1/32 (3.1%) | 5/32 (15.6%) |
| Event | 0.5 mL rBV A/B |
|---|---|
| pulmonary embolismRespiratory, thoracic and mediastinal disorders | 1/32 |
| Event | 0.5 mL rBV A/B |
|---|---|
| injection site erythemaGeneral disorders | 4/32 |
| injection site indurationGeneral disorders | 3/32 |
| injection site painGeneral disorders | 1/32 |
| Age, Categorical(Participants) | 0.5 mL rBV A/B |
|---|---|
| <=18 years | 0 |
| Between 18 and 65 years | 30 |
| >=65 years | 2 |
| Age, Continuous(years) | 0.5 mL rBV A/B |
|---|---|
| Mean | 46.6 ± 8.80 |
| Age, Continuous(years) | 0.5 mL rBV A/B |
|---|---|
| Median | 44.5 (33 to 69) |
| Sex: Female, Male(Participants) | 0.5 mL rBV A/B |
|---|---|
| Female | 16 |
| Male | 16 |
| Ethnicity (NIH/OMB)(Participants) | 0.5 mL rBV A/B |
|---|---|
| Hispanic or Latino | 0 |
| Not Hispanic or Latino | 32 |
| Unknown or Not Reported | 0 |
| Ethnicity (NIH/OMB)(Participants) | 0.5 mL rBV A/B |
|---|---|
| Hispanic or Latino | 0 |
| Not Hispanic or Latino | 32 |
| Unknown or Not Reported | 0 |
| Race (NIH/OMB)(Participants) | 0.5 mL rBV A/B |
|---|---|
| American Indian or Alaska Native | 0 |
| Asian | 3 |
| Native Hawaiian or Other Pacific Islander | 0 |
| Black or African American | 1 |
| White | 28 |
| More than one race | 0 |
| Unknown or Not Reported | 0 |
| Region of Enrollment(participants) | 0.5 mL rBV A/B |
|---|---|
| United States | 32 |
1 further baseline measures are reported on the registry.
PDFs hosted by the registry, ClinicalTrials.gov.
This study is completed, as verified in Jan 2020. You cannot join it, but the record below documents what was studied.
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Studies of the drug tested here: Recombinant botulinum vaccine A/B
California Department of Public Health