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Healthy VolunteersPhase 1NCT05987488

ShigETEC Vaccine Study in Bangladesh

A Phase 1 study testing ShigETEC live, attenuated, oral vaccine in people with Healthy Volunteers, run by Eveliqure Biotechnologies GmbH at 1 site in Bangladesh.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The goal of this clinical trial is to test ShigETEC vaccine, a combination vaccine against Shigella and ETEC diarrhoea in Bangladeshi adults (aged 18-45 years) and paediatric participants of three different age groups (aged 2-5 years, 12-23 months and 6-11 months). Read more about this study

Who is it for?
Ages 6 months to 45 yearsHealthy volunteers can take part
Conditions the study is for
Healthy Volunteers
What is being tested?
ShigETEC live, attenuated, oral vaccine
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
196 participants
Where
1 siteBangladesh
Study dates
26 Nov 2023to 1 Dec 2025
Phase
Phase 1
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 6 months to 45 years
  • All sexes
  • Healthy volunteers accepted
  • Child, Adult

Who may be able to join

  • Male or female adults, children, toddlers, and infants aged between 18-45 years, 2-5 years, 12-23 months, and 6-11 months, respectively at the time of vaccination.
  • Free of obvious health problems as determined by medical history and clinical examination before entering into the study.
  • Normal bowel habits.
  • Informed consent form signed.
  • Negative pregnancy tests before each vaccination for females of childbearing potential. Adult participants agree to use birth control steps or abstinence.

Who cannot join

  • Nursing and breast-feeding women.
  • Presence of any known significant medical or psychiatric condition / systemic disorder.
  • History of congenital abdominal disorders, intussusception, abdominal surgery, any other congenital disorder, any neurologic disorders or seizures.
  • Clinically significant abnormalities in screening hematology, serum chemistry.
  • Known or suspected HIV, hepatitis infection.
  • Clinical evidence of active gastrointestinal illness or acute disease at the time of enrolment.
Show all 14Show fewer
  • Prior receipt of any Shigella or ETEC vaccine, blood transfusion or blood products.
  • History of febrile illness within 48 hours prior to vaccination or fever at the time of immunization.
  • History of diarrhoea within 7 days and / or acute diarrhoea due to culture confirmed Shigella or ETEC infections within one month prior to vaccination.
  • Screening stool positive for any Shigella or ETEC strain by culture.
  • Participation in research involving another investigational product within 30 days before before planned date of first vaccination concurrent participation in another clinical trial.
  • Receipt of antimicrobial drugs for any reason within 7 days before vaccination.
  • Allergy to quinolone, sulfa, and penicillin classes of antibiotics
  • Any conditions which, in the opinion of the investigator, might jeopardize the safety of study participants or interfere with the evaluation of the study objectives.

Trial locations and contacts

1 site in 1 country.

Bangladesh1 site
  • International Centre for Diarrhoeal Diseases Research, Bangladesh (icddr,b)

    Dhaka

Other trials in Bangladesh

About this study

Official title: Early Clinical Development of a Live, Attenuated Combination Vaccine Against Shigella and ETEC Diarrhoea: Phase 1b Clinical Trial of ShigETEC Vaccine in Bangladeshi Adults and Three Paediatric Age Groups

The goal of this clinical trial is to test ShigETEC vaccine, a combination vaccine against Shigella and ETEC diarrhoea in Bangladeshi adults (aged 18-45 years) and paediatric participants of three different age groups (aged 2-5 years, 12-23 months and 6-11 months).

The main question[s] it aims to answer are:

  • Safety and clinical tolerability of the vaccine
  • Immune responses generated by the vaccine In the age-descending dose-escalating study
  • Adult participants will be divided into 2 escalating dose cohorts
  • Each age group of paediatric participants will be divided into 3 escalating dose cohorts
  • Participants in each cohort will receive three doses of vaccine/placebo two weeks apart
  • Solicited and unsolicited adverse events (AE) and serious adverse events (SAE) will be monitored after each vaccination dose
  • Stool samples will be collected for immunological analysis and shedding of vaccine strain
  • Blood samples will be collected for immunological analysis
Read the detailed description

A double-blind, randomized, placebo-controlled, age-descending and dose-escalating phase 1b clinical trial will be carried out in Bangladeshi adults and three paediatric age groups to evaluate the safety, clinical tolerance, and immunogenicity of ShigETEC, a live, attenuated Shigella/ETEC combination vaccine.

Objectives of the study

Primary Objectives:

To evaluate the safety and clinical tolerability of oral ShigETEC vaccine in Bangladeshi adults and different age groups of paediatric participants by monitoring the occurrence and severity of clinical signs and symptoms after administration of each of the three vaccinations.

Secondary Objectives:

  • To evaluate the immune response to Shigella and ETEC (Enterotoxigenic Escherichia coli) antigens in blood and stool following administration of ShigETEC vaccine.
  • To assess the fecal shedding of ShigETEC following ingestion.

The age-descending study will start testing the vaccine in healthy adults (aged 18-45 years) and move subsequently into three different paediatric age groups (aged 2-5 years, 12-23 months and 6-11 months). In the adult participants (group A), fifty-four participants will be enrolled and divided into 3 escalating dose cohorts. Each cohort of 18 healthy adults (12 vaccinees and 6 placebo recipients) will be randomized to receive three times vaccine/placebo two weeks apart. The first adult cohort (cohort A1) will receive the optimal vaccine dose (OVD) found in Phase I Europe trial (5x10^10 CFU). Cohort A2 will be given 4-fold higher dose than cohort A1 (2x10^11 CFU). Cohort A3 will receive a lower dose according to DSMB decision (2x10^9 CFU).

In each of the 2-5 years (group B), 12-23 months (group C), and 6-11 months age group (group D), 48 participants will be enrolled and divided into 3 escalating dose cohorts with 16 participants in each cohort (12 vaccinees and 4 placebo recipients). B1 cohort will be immunized with 25-fold lower than the OVD in EU (Europe) Phase 1 trial (2x10^9CFU). Cohorts B2 and B3 will be given higher doses in 5-fold increments, and thus cohort B2 will receive 1x10^10 CFU and cohort B3 will receive the OVD in EU Phase 1 trial (5x10^10 CFU). Cohort C1 will be vaccinated with 25-fold lower than the OVD in group B. Cohorts C2 and C3 will receive higher doses in 5-fold increments. Cohort D1 will be given 25- fold lower than the OVD in group C. Cohorts D2 and D3 will receive higher doses in 5-fold increments.

Recruitment, screening, and consenting of the participants will take place at the urban field site of icddr,b in Mirpur. In each cohort, the first dose and immediate safety evaluation will be conducted at the Clinical Trial Unit (CTU), an inpatient facility, where the participants will be closely monitored for 24 hours post-vaccination. If the initial dose is deemed safe, all participants will return to the CTU to receive the second and third time vaccine or placebo on an outpatient basis. Follow-up visits will take place 7 days after each dosing and 28 days after last dosing at the Mirpur field office.

Primary safety endpoint:

  1. Solicited reactogenicity
  2. Unsolicited adverse event (AE)
  3. Serious adverse event (SAE)

Secondary immunogenicity endpoints:

  1. Changes of antibody responses to antigens from baseline to each visit after vaccination:
  • Antibody responses IgG (Immunglobulin G) and IgA (Immunglobulin A) in all age groups in serum
  • IgA in lymphocyte supernatant (ALS) and fecal extract
  1. Functional antibodies:
  • ETEC toxins neutralization titers
  • Serum bactericidal activity
  • Inhibition of bacterial adherence and entry to human colon epithelial cells
  1. Antibody responses to Shigella and ETEC proteins and peptides
  2. Antibody avidity against LT, ST and selected Shigella antigens

Secondary shedding endpoint:

Intestinal replication of the ShigETEC vaccine

Being tested
ShigETEC live, attenuated, oral vaccine, Placebo
Keywords
Shigella, Enterotoxigenic Escherichia Coli
Medical subject headings
Dysentery, Bacillary

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • ShigETEC live, attenuated, oral vaccineBiological

    Vaccine will be delivered orally.

    Stage 1:

    Adults (18-45 years) will intake the vaccine 3 times 14 days apart in a dose escalating setting with two different doses.

    Stage 2:

    Children (2-5 years), Toddlers(12-23 months), Younger children (6-11 months) will intake the vaccine 3 times 14 days apart in a dose escalating setting with three different doses.

  • PlaceboOther

    Placebo will be delivered orally.

    Stage 1:

    Adults (18-45 years) will intake the placebo 3 times 14 days apart

    Stage 2:

    Children (2-5 years), Toddlers(12-23 months), Younger children (6-11 months) will intake the placebo 3 times 14 days apart.

Study groups in NCT05987488
Study groupRoleWhat they receive
ShigETEC vaccineExperimentalThe vaccine will consist of a suspension of a live, attenuated Shigella bacterial strain (a clinical isolate of Shigella flexneri 2457T strain) into which the genes for nontoxic forms of the ETEC heatlabile toxin B subunit (LTB) and a mutant heat stable toxin (STm) have been inserted.
Receives: Biological: ShigETEC live, attenuated, oral vaccine
PlaceboPlacebo comparatorA saline solution with corn starch
Receives: Other: Placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Reactogenicity

    Solicited adverse events in participants after vaccination. ShigETEC vaccine may result in symptoms similar to infection with Shigella or ETEC including fever, decreased appetite, irritability, decreased activity, abdominal pain, nausea, vomiting, loose stool, diarrhoea, dysentery, bloating, excess flatulence and constipation.

    Measured: 72 hours after vaccination

  2. Unsolicited adverse event (AE)

    Any untoward medical occurrence in study participants during the conduct of a clinical trial, for which there is no or less possibility that the drug caused the event.

    Measured: From first vaccination throughout 56 days

  3. Serious adverse event (SAE)

    Adverse event(s) classified as serious per definition.

    Measured: From first vaccination throughout 56 days

Secondary outcomes (7)
  1. Antigen-specific Antibody titers induced by ShigETEC

    Changes in IgG and IgA in plasma/serum, IgA in ALS and fecal extract to specific antigens from baseline to each visit after vaccination.

    Measured: From the day of first vaccination throughout 56 days in a 14 day interval

  2. Functional antibodies induced by ShigETEC- neutralization

    ETEC toxins neutralization titers

    • Serum bactericidal activity
    • Inhibition of bacterial adherence and entry to human colon epithelial cells

    Measured: From the day of first vaccination throughout 56 days in a 14 day interval

  3. Characterization of the antibody repertoire induced by ShigETEC

    Mapping of the vaccine-induced antibody for the entire Shigella proteome and ETEC toxin by high-resolution peptide and protein microarray assay.

    Measured: From the day of first vaccination throughout 56 days in a 14 day interval

  4. Antibody avidity induced by ShigETEC

    Antigen-antibody binding avidity

    Measured: From the day of first vaccination throughout 56 days in a 14 day interval

  5. Shedding of vaccine in stool

    Assessment of intestinal replication of the ShigETEC vaccine

    Measured: From the day of first vaccination throughout 56 days

  6. Functional antibodies induced by ShigETEC - SBA

    Serum bactericidal activity

    Measured: From the day of first vaccination throughout 56 days in a 14 day interval

  7. Functional antibodies induced by ShigETEC - adherence

    Inhibition of bacterial adherence and entry to human colon epithelial cells

    Measured: From the day of first vaccination throughout 56 days in a 14 day interval

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted14 Aug 2023
  2. Study start26 Nov 2023
  3. Primary completion1 Dec 2025
  4. Study completion1 Dec 2025

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Sequential
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
196 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05987488
Sponsor's protocol ID
PR-19067
Status last verified
Jan 2026
First submitted
25 Jul 2023
Last updated
23 Jan 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing ShigETEC live, attenuated, oral vaccine in people with Healthy Volunteers, run by Eveliqure Biotechnologies GmbH at 1 site in Bangladesh.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 5 inclusion and 14 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 23 Jan 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Bangladesh. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Reactogenicity (time frame: 72 hours after vaccination). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 23 Jan 2026.

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