Immunogenicity and Tolerability of Booster Typhoid Conjugate Vaccine (TCV) 5-6 Years After Initial Dose in Children in Burkina Faso
28. maj 2026 opdateret af: Kathleen Neuzil
Immunogenicity and Tolerability of Typhoid Conjugate Vaccine (TCV) 5-6 Years After Routine Vaccines Administered With or Without TCV Among Children Younger Than 2 Years in Ouagadougou, Burkina Faso
This study evaluated the persistence of immunity following primary typhoid conjugate vaccination in early childhood and assessed the immunogenicity and safety of a booster dose administered 5-6 years later. Children previously enrolled in a Phase 2 randomized clinical trial of Vi-tetanus toxoid conjugate vaccine (Vi-TT) were re-enrolled at 6-7 years of age. Participants who previously received Vi-TT received a booster dose of Vi-CRM, while control participants received their first TCV dose.
Anti-Vi IgG antibody responses were measured at baseline and 28 days post-vaccination. Safety was assessed through solicited and unsolicited adverse events. This study provides data on durability of TCV immunity and the potential role of booster dosing in endemic settings.
Studieoversigt
Status
Afsluttet
Betingelser
Intervention / Behandling
Detaljeret beskrivelse
This prospective, open-label interventional study followed children previously enrolled in a Phase 2 randomized controlled trial of Vi-TT administered in infancy. Approximately 5-6 years later, participants were re-contacted and assigned to receive either a booster TCV dose (Vi-CRM) or a first TCV dose depending on prior vaccination status.
Immunogenicity was assessed using anti-Vi IgG ELISA assays at baseline and 28 days post-vaccination. Safety outcomes included solicited and unsolicited adverse events and serious adverse events. The study was conducted at a single clinical site in Ouagadougou, Burkina Faso.
Undersøgelsestype
Interventionel
Tilmelding (Faktiske)
147
Fase
- Fase 2
Kontakter og lokationer
Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.
Studiesteder
-
-
-
Ouagadougou, Burkina Faso
- Schiphra Protestant Hospital
-
-
Deltagelseskriterier
Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.
Berettigelseskriterier
Aldre berettiget til at studere
- Barn
Tager imod sunde frivillige
Ja
Beskrivelse
Inclusion Criteria:
- Male or female children previously enrolled in the 2018-2019 Phase 2 typhoid conjugate vaccine trial
- Residence within study area
- Parent/guardian provides informed consent
Exclusion Criteria:
- Receipt of blood products within 6 months
- Prior typhoid conjugate vaccine receipt outside the study
- Medical condition interfering with evaluation
- Acute illness or fever prior to vaccination (temporary exclusion)
Studieplan
Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Forebyggelse
- Tildeling: N/A
- Interventionel model: Enkelt gruppeopgave
- Maskning: Ingen (Åben etiket)
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
|---|---|
|
Eksperimentel: typhoid conjugate vaccine (TCV)
Received one intramuscular dose of Vi-CRM (TYPHIBEV®)
|
Typhoid conjugate vaccine: Vi capsular polysaccharide conjugated to CRM197 carrier protein, administered as 0.5mL intramuscularly
|
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Anti-Vi IgG Antibody Response (Immunogenicity)
Tidsramme: Baseline (Day 0) and Day 28 post-vaccination
|
Geometric Mean Titers (GMT) and fold-rise in anti-Vi IgG
|
Baseline (Day 0) and Day 28 post-vaccination
|
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Seroconversion rate
Tidsramme: Day 28
|
Proportion of participants achieving ≥4-fold increase in anti-Vi IgG
|
Day 28
|
|
Solicited adverse events
Tidsramme: Days 0-7
|
Local and systemic adverse events within 7 days post-vaccination
|
Days 0-7
|
|
Unsolicited adverse events
Tidsramme: Days 0-28
|
Any non-solicited adverse events
|
Days 0-28
|
|
Serious adverse events
Tidsramme: Days 0-28
|
Any serious adverse events
|
Days 0-28
|
Samarbejdspartnere og efterforskere
Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.
Sponsor
Samarbejdspartnere
Publikationer og nyttige links
Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.
Generelle publikationer
- Sirima SB, Ouedraogo A, Barry N, Siribie M, Tiono A, Nebie I, Konate A, Berges GD, Diarra A, Ouedraogo M, Bougouma EC, Soulama I, Hema A, Datta S, Liang Y, Rotrosen ET, Tracy JK, Jamka LP, Oshinsky JJ, Pasetti MF, Neuzil KM, Laurens MB. Safety and immunogenicity of Vi-typhoid conjugate vaccine co-administration with routine 9-month vaccination in Burkina Faso: A randomized controlled phase 2 trial. Int J Infect Dis. 2021 Jul;108:465-472. doi: 10.1016/j.ijid.2021.05.061. Epub 2021 Jun 1.
- Laurens MB, Sirima SB, Rotrosen ET, Siribie M, Tiono A, Ouedraogo A, Liang Y, Jamka LP, Kotloff KL, Neuzil KM. A Phase II, Randomized, Double-blind, Controlled Safety and Immunogenicity Trial of Typhoid Conjugate Vaccine in Children Under 2 Years of Age in Ouagadougou, Burkina Faso: A Methods Paper. Clin Infect Dis. 2019 Mar 7;68(Suppl 2):S59-S66. doi: 10.1093/cid/ciy1104.
- Sirima SB, Ouedraogo A, Barry N, Siribie M, Tiono AB, Nebie I, Konate AT, Berges GD, Diarra A, Ouedraogo M, Soulama I, Hema A, Datta S, Liang Y, Rotrosen ET, Tracy JK, Jamka LP, Neuzil KM, Laurens MB. Safety and immunogenicity of co-administration of meningococcal type A and measles-rubella vaccines with typhoid conjugate vaccine in children aged 15-23 months in Burkina Faso. Int J Infect Dis. 2021 Jan;102:517-523. doi: 10.1016/j.ijid.2020.10.103. Epub 2020 Nov 8.
- Ouedraogo A, Diarra A, Nebie I, Barry N, Kabore JM, Tiono AB, Datta S, Liang Y, Mayo I, Oshinsky JJ, Tracy JK, Girmay T, Pasetti MF, Jamka LP, Neuzil KM, Sirima SB, Laurens MB. Durable Anti-Vi IgG and IgA Antibody Responses in 15-Month-Old Children Vaccinated With Typhoid Conjugate Vaccine in Burkina Faso. J Pediatric Infect Dis Soc. 2023 Sep 27;12(9):513-518. doi: 10.1093/jpids/piad058.
- Sawadogo JW, Hema A, Diarra A, Kabore JM, Hien D, Kouraogo L, Zou AR, Ouedraogo AZ, Tiono AB, Datta S, Pasetti MF, Neuzil KM, Sirima SB, Ouedraogo A, Laurens MB#. Immunogenicity and tolerability of booster typhoid conjugate vaccine (TCV) five to six years after initial dose in Burkinabe children. medRxiv [Preprint]. 2026 Apr 21. doi:10.64898/2026.04.19.26351224.
Datoer for undersøgelser
Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.
Studer store datoer
Studiestart (Faktiske)
17. august 2024
Primær færdiggørelse (Faktiske)
26. oktober 2024
Studieafslutning (Faktiske)
26. oktober 2024
Datoer for studieregistrering
Først indsendt
28. maj 2026
Først indsendt, der opfyldte QC-kriterier
28. maj 2026
Først opslået (Faktiske)
3. juni 2026
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
3. juni 2026
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
28. maj 2026
Sidst verificeret
1. maj 2026
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- HP-00110239
- INV 030857 (Andet bevillings-/finansieringsnummer: Gates Foundation)
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
JA
IPD-planbeskrivelse
Individual participant data will be available, after de-identification, via the Vivli platform upon approved request.
IPD-delingstidsramme
Upon study publication and for the subsequent 24 months.
IPD-delingsadgangskriterier
Persons who submit an approved request via the Vivli platform online will be able to access individual participant data after de-identification.
IPD-deling Understøttende informationstype
- STUDY_PROTOCOL
- ICF
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
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Ingen
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Ingen
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