Safety and Efficacy Challenge Study of Live Oral Cholera Vaccine Candidate,PXVX0200, to Prevent Cholera

June 26, 2023 updated by: Bavarian Nordic

A Phase 3 Randomized, Double-Blind, Placebo-Controlled, Efficacy Trial of a Single Dose Live Oral Cholera Vaccine, PXVX0200 CVD 103-HgR, in Preventing Cholera Following Challenge With Vibrio Cholerae 10 Days or 3 Months After Vaccination

The purpose of the study is to determine if PXVX0200 is safe and effective in preventing cholera infection

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

A Phase 3 Randomized, Double-Blind, Placebo-Controlled, Efficacy Trial of a Single Dose of Live Oral Cholera Vaccine Candidate, PXVX0200 CVD 103-HgR Strain, in Preventing Cholera following Challenge with Vibrio cholerae O1 El Tor Inaba 10 Days or 3 Months after Vaccination in volunteers aged 18-45 years

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
197

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 3

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

  • United States
    • Maryland
      • Baltimore, Maryland, United States, 21201
        • University of Maryland Baltimore
    • Ohio
      • Cincinnati, Ohio, United States, 45229
        • Cincinnati Children's Hospital Medical Center
    • Vermont
      • Burlington, Vermont, United States, 05405
        • University of Vermont

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 45 years (Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • healthy men or women,
  • age 18 to 45 years inclusive;
  • normal medical history and physical examination; and
  • no clinically significant abnormalities from:
  • urine dipstick for glucose, protein, and blood
  • complete blood count,
  • serum hepatic transaminases,
  • total bilirubin (direct if abnormal),
  • creatinine,
  • electrolytes,
  • albumin, or
  • electrocardiogram.
  • Women must have a negative pregnancy test.

Exclusion Criteria:

  • travel to a cholera endemic area in the previous 5 years;
  • abnormal stool pattern or regular use of laxatives;
  • history of eating disorders (such as bulimia), anal or rectal disorders, allergy to tetracycline and/or ciprofloxacin;
  • history of cholera or enterotoxigenic E. coli challenge or infection;
  • current or recent antibiotic use;
  • pregnancy or nursing;
  • positive serology for HIV, hepatitis B antigen, or hepatitis C;
  • any immunosuppressive medical condition;
  • history of hospitalization for psychiatric illness or use of specific psychiatric drugs.

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: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: PXVX0200
Biological: PXVX0200 Single dose; liquid suspension after reconstitution with buffer; 5x10^8 CFU
Biological: PXVX0200
Single dose; liquid suspension after reconstitution with buffer; 5x10^8
Placebo Comparator: Placebo
Biological: Placebo physiological saline
Biological: placebo

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
% of Participants With Moderate to Severe Diarrhea
Time Frame: Ten days after vaccination
Determine whether a single dose of PXVX0200 provides significantly greater protection than placebo against a challenge with virulent V. cholerae O1 El Tor Inaba at 10 days after vaccination. The primary endpoint was the occurrence of moderate or severe (>/= 3 liters) diarrhea.
Ten days after vaccination
% of Participants With Moderate to Severe Diarrhea
Time Frame: Ninety days after vaccination
Determine whether a single dose of PXVX0200 provides significant greater protection than placebo against a challenge with virulent V. cholerae O1 El Tor Inaba at 3 months after vaccination. The primary endpoint was the occurrence of moderate or severe (>/= 3 liters) of diarrhea.
Ninety days after vaccination

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Total Weight of Diarrheal Stools Following the 10 Day Cholera Challenge
Time Frame: Through 10 Days following challenge
Total weight (converted to volume) per subject of diarrheal stools measured from subjects with diarrhea following the 10 day cholera challenge.
Through 10 Days following challenge
Total Weight of Diarrheal Stools Following the 90 Day Cholera Challenge
Time Frame: Through 10 Days following challenge
Total weight (converted to volume) per subject of diarrheal stools measured from subjects with diarrhea following the 90 day cholera challenge.
Through 10 Days following challenge
% of Participants With Diarrhea of Any Severity Following a 10 Day Cholera Challenge
Time Frame: Through 10 Days following challenge
Incidence of mild or worse (any severity) diarrhea following the 10 day cholera challenge.
Through 10 Days following challenge
% of Participants With Diarrhea of Any Severity Following a 90 Day Challenge
Time Frame: Through 10 Days following challenge
Incidence of mild or worse (any severity) diarrhea following the 90 day cholera challenge.
Through 10 Days following challenge
% of Participants With Fever Following the 10 Day Cholera Challenge
Time Frame: Through 10 Days following challenge
Incidence of mild or worse fever following the 10 day cholera challenge.
Through 10 Days following challenge
% of Participants With Fever Following the 90 Day Cholera Challenge
Time Frame: Through 10 Days following challenge
Incidence of mild or worse fever following the 90 day cholera challenge.
Through 10 Days following challenge
Number of Days With Fecal Shedding Following 10 Day Challenge
Time Frame: Through 10 Days post challenge
Number of days of fecal shedding of wild type V. cholerae following 10 Day Challenge.
Through 10 Days post challenge
Number of Days With Fecal Shedding Following 90 Day Challenge
Time Frame: Through 10 days following challenge
Number of days of fecal shedding of wild type V. cholerae following 90 Day Challenge
Through 10 days following challenge
# of Days With Positive Stool Culture Following 10 Day Cholera Challenge
Time Frame: Through 10 Days following challenge
Total number of days with a positive stool culture following the 10 Day Cholera challenge.
Through 10 Days following challenge
# of Days With Positive Stool Culture Following 90 Day Cholera Challenge
Time Frame: Through 10 Days following challenge
Total number of days with a positive stool culture following 90 Day Cholera Challenge
Through 10 Days following challenge
% of Participants With Reactogenicity, Diarrhea, Fever or Unsolicited Adverse Events Following Vaccination
Time Frame: Following vaccination (Days 1 - 8) and to Day 29

Incidence and severity of signs and symptoms of reactogenicity such as diarrhea, and fever following vaccination (through Day 8).

Incidence and severity of unsolicited adverse events following vaccination (through Day 29).
Following vaccination (Days 1 - 8) and to Day 29

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Bavarian Nordic

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Emergent BioSolutions

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: James McCarty, MD, Emergent BioSolutions

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
September 1, 2013

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
November 1, 2014

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
November 1, 2014

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
July 5, 2013

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 10, 2013

First Posted (Estimated)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
July 11, 2013

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
June 28, 2023

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 26, 2023

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
June 1, 2023

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • PXVX-VC-200-003

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

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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