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New vaccine aims to tackle multiple salmonella strains at once

NCT ID NCT07663032

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jul 29, 2026 · Updated 2 times

Summary

This study tests a new quadrivalent Pan-Salmonella vaccine designed to protect against several types of Salmonella bacteria that cause typhoid and paratyphoid fevers. Healthy adults aged 18 to 45 in Africa receive either a low or full dose of the vaccine, with or without an adjuvant (alum), to see how safe it is and how well it triggers an immune response. The trial is the first step in humans for this vaccine and will monitor side effects and antibody levels.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Pan-Salmonella vaccine (with or without alum)
What this could lead to
If successful, this could lead to a vaccine that protects against multiple Salmonella strains, reducing typhoid and paratyphoid fever in Africa.
What could go wrong
This is an early phase 1 trial with only 196 participants, so safety and immune response are still being tested. The vaccine may not produce strong enough protection or could have side effects.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 1

The first testing in people. Mainly checks safety and dose, usually in a small group.

Participants

About 196 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jun 2026

Expected to finish

Nov 2027

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 45 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Participants who, in the opinion of the Investigator, can and will comply with the requirements of the protocol (e.g., completion of the Diary cards, return for follow-up visits). 2. Written informed consent obtained from the participant prior to performance of any study specific procedure. 3. Healthy participants as established by medical history, clinical examination, and laboratory assessment\*. \*Hepatitis B surface antigen (HBsAg), hepatitis C virus (HCV) antibodies, and human immunodeficiency virus (HIV) antibodies will also be tested at Screening. 4. A male or female between and including 18 to 45 years of age at the time of the first study intervention administration, and no older than 45 years of age at second dose administration. 5. Female participants of nonchildbearing potential may be enrolled in the study. Nonchildbearing potential is defined as pre-menarche, current bilateral tubal ligation or occlusion, hysterectomy, bilateral ovariectomy, or menopause. 6. Participants of childbearing potential may be enrolled in the study if the participant: * Has practiced adequate contraception (as indicated in Section 10.5) for at least 30 days prior to study intervention administration, and * Has a negative pregnancy test within 24 hours prior to the study intervention administration, and * Has agreed to continue adequate contraception during the entire treatment period and for 8 weeks after completion of the study intervention administration series. 7. Negative HLA-B27 testing. 8. Body mass index of 18\>= to \<=30 kg/m2 at Screening. 9. Living in the study area and plan to remain in the study area for the study duration. Exclusion Criteria: Medical Conditions: 1. Known exposure to S. Typhi, S. Paratyphi A, and non-typhoidal Salmonella confirmed by blood culture during the period starting 3 years prior to first study intervention administration as confirmed using medical history. 2. History of any reaction or hypersensitivity likely to be exacerbated by any component of the study intervention. 3. Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination (no laboratory testing required). 4. Acute or chronic clinically significant pulmonary, cardiovascular, hepatic, or renal functional abnormality, as determined by physical examination or laboratory screening tests. 5. Recurrent history or uncontrolled neurological disorders or seizures. 6. Any clinically significant hematological and/or biochemical laboratory abnormality. 7. Clinical conditions representing a contraindication to intramuscular (IM) injections and/or blood draws. 8. Any behavioral or cognitive impairment or psychiatric disease that in the opinion of the Investigator, may interfere with the participant's ability to participate in the study. 9. Acute or chronic illness which may be severe enough to preclude participation. 10. Any other clinical condition that, in the opinion of the Investigator, might pose additional risk to the participant due to participation in the study. Prior/Concomitant Therapy: 11. History of receiving any typhoid vaccine (Ty21a, Vi capsular polysaccharide, or TCV) in the participant's life. 12. History of receiving any investigational iNTS, S. Paratyphi A, or GMMA vaccines in the participant's life. 13. Use of any investigational or non-registered product (drug, vaccine, or medical device) other than the study interventions during the period beginning 30 days (Days -30 to 1) before the first dose of study interventions, or their planned use during the study period. Use of herbs and traditional treatments is not considered an exclusion criterion. 14. A vaccine not foreseen by the study protocol administered during the period starting at 14 days before the first dose and ending 30 days after the last dose of study interventions administration, with the exception of flu vaccines or Coronavirus disease 2019 vaccine. 15. Administration of long-acting immune-modifying drugs (e.g., infliximab) at any time during the study period. 16. Administration of immunoglobulins and/or any blood products or plasma derivatives during the period starting 3 months before the administration of the first dose of study interventions or planned administration during the study period. 17. Chronic administration (defined as more than 14 days in total) of immunosuppressants or other immune-modifying drugs during the period starting 3 months prior to the first study intervention dose(s). For corticosteroids, this will be prednisone equivalent \>=20 mg/day for adult participants. Inhaled and topical steroids are allowed. Prior/Concurrent Clinical Study Experience: 18. Concurrently participating in another clinical study, at any time during the study period, in which the participant has been or will be exposed to an investigational or a non-investigational intervention (vaccine and drug). Other Exclusions: 19. Pregnant or lactating female. 20. Female planning to become pregnant or planning to discontinue contraceptive precautions. 21. History of/current chronic alcohol consumption and/or drug abuse. This will be decided at the discretion of the Investigator. 22. Any study personnel or their immediate dependents, family, or household members.

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • GSK Investigational Site

    RECRUITING

    Bloemfontein, 9301, South Africa

More trials for these conditions

Other studies related to the condition(s) this trial covers.